A money market fund lets a business earn a market rate on cash it does not need for a while, without locking the money away. The fund puts cash from many investors into very short-term debt, such as government bills and bank deposits, and you sell your shares when you need the money back.
The hard part is knowing what you are buying. EU rules set four kinds of fund with different pricing and liquidity rules, and charges, ratings and dealing times vary from fund to fund. A fund is also not a bank deposit. It carries no guarantee, the €100,000 deposit cover does not apply, and its value can fall.
This is where we come in. We connect your company with our regulated treasury partner, which offers funds in euros, pounds and US dollars. We check your eligibility, prepare the onboarding with you and stay your single point of contact. Your cash is invested 2 to 3 business days after onboarding, with no lock-in.
Put Spare Company Cash Into a Money Market Fund
Cash that sits in a current account for months can earn a market rate instead. We set up the fund side with you.
- Funds in three currencies: From 2% p.a. in EUR, GBP or USD, with a variable return.
- Regulated investing: A CySEC-regulated investment firm handles the funds for you.
- Cash when you need it: No lock-in, so you sell your shares when the business needs the money.
- Spread beyond one bank: Move balances above €100,000 off a single bank's books.
- Quick start: Digital onboarding that usually takes about a day.
- One contact: We handle the setup and the paperwork with you.
When investing, your capital is at risk. Yields may vary.
Sophic
Treasury management
Yield
2% to 3%+ p.a
Fees
0.3% a year + €10 per order
Eligibility
EU/EEA businesses with an LEI
When investing, your capital is at risk. Yields may vary.
What Is a Money Market Fund
A money market fund is an investment fund that puts investors' cash into very short-term, high-quality debt and bank deposits. You own shares in the fund, and your return follows short-term interest rates. In the EU, Regulation (EU) 2017/1131 has set how money market funds work since 21 July 2018.
The regulation, which shortens the name to MMF, calls these funds short-term cash management tools and says companies are their main users, investing spare cash for a short time (recital 2).
The Fund Holds Only Short-Term Debt and Deposits
Article 9 lists what a fund may buy. The main items are money market instruments such as government bills, certificates of deposit and commercial paper, plus bank deposits and repurchase agreements. Under Article 10, most must mature within 397 days. A fund cannot buy shares or commodities, sell short, lend out its securities, or borrow or lend cash. Article 17 caps holdings from one issuer at 5% of assets and deposits with one bank at 10%, with a wider exception for government debt.
Money Market Fund Shares Are Not Bank Deposits
Cash in a bank is a loan to that bank. Cash in a fund buys shares, sometimes called units, in a portfolio spread across many issuers. If those holdings lose value, your shares lose value too.
Article 36(3) makes every fund say so in its marketing. It must state that it carries no guarantee, that it differs from a deposit, that the amount invested can go up and down, that it does not rely on outside support, and that the investor bears the risk of loss.
European Funds Hold €2,236 Billion
EFAMA's fact sheet for July 2026, published on 30 September 2026, puts net assets of money market UCITS in 29 European countries at €2,236 billion, up 6.8% since the end of 2025. In Luxembourg alone, the regulator, the CSSF, counted 115 funds of this type holding €631 billion at the end of 2025. In the US, these funds held $7.89 trillion in the week ended 30 September 2026, according to the Investment Company Institute.
Sophic
Treasury management
Yield
2% to 3%+ p.a
Fees
0.3% a year + €10 per order
Eligibility
EU/EEA businesses with an LEI
When investing, your capital is at risk. Yields may vary.
How Do Money Market Funds Work
Once you know what a money market fund is, the mechanics are simple. The fund pools cash from many investors and lends it for short periods to governments, banks and large companies. The interest it earns, less its charges, is your return. You buy or sell shares at the published price, usually before a daily cut-off time.
You Buy and Sell Shares at the Day's Price
When you invest, the fund issues new shares at its net asset value (NAV) per share, and Article 29 requires it to value its assets at least daily. Income builds up every day. Some share classes pay it out, while others add it to the share price, which changes how the return shows in your accounts.
To get cash back, you place a sell order before the cut-off and receive that dealing day's price (Article 33). The prospectus states the cut-off and when the cash reaches your account. With our regulated treasury partner there is no lock-in.
The Money Market Fund Yield Follows Short-Term Rates
The fund keeps reinvesting short loans at current rates, so its yield moves with central bank rates. Research from the Federal Reserve Bank of New York, published on 11 April 2024, found that the yields of European MMFs track ECB policy much more closely than bank deposit rates do.
At the time of writing, in October 2026, the ECB's deposit facility rate is 2.50%, in force since 16 September 2026. The euro short-term rate (€STR), which measures what euro area banks pay to borrow overnight, was 2.438% on 5 October 2026. Funds in euros earn returns linked to rates like these, before charges. Euro area companies earned an average of 0.61% on overnight deposits in August 2026, according to the ECB. When investing, your capital is at risk. Yields may vary.
The link also works downwards. The ECB's deposit rate was below zero from June 2014 to July 2022, and the same New York Fed research shows European fund yields turning negative from December 2015.
Every Fund Reports Its Holdings Weekly
Under Article 36(2), the manager must give investors, at least weekly, the maturity breakdown, the credit profile, the WAM and WAL, the 10 largest holdings, total assets and the net yield. Read it before you invest and while you hold.
Read more: what Treasury bills are and how a company buys them.
Earn on Company Cash Without a Treasury Team
You do not need in-house treasury staff to use these funds. Tell us how much cash you hold and when you will need it.
- Fund facts upfront: See the fund type, currency and yield before you put money in.
- Segregated client cash: Held at J.P. Morgan, apart from the firm's own money.
- Independent custody: Your fund shares are safeguarded by SIX Group.
- Paperwork handled: We prepare the onboarding documents with you.
- You stay in control: You decide how much goes in and when it comes out.
When investing, your capital is at risk. Yields may vary.
Types of Money Market Funds in the EU
EU law allows three types of fund: public debt constant NAV (CNAV), low volatility NAV (LVNAV) and variable NAV (VNAV). Funds are also short-term or standard, depending on how long their holdings run, and only a VNAV can be standard. The type decides how a money market fund works on a normal day and under stress.
Public Debt CNAV Funds Hold Government Debt
A public debt CNAV fund puts at least 99.5% of its assets into government debt, reverse repos backed by government debt, and cash. It aims to keep the price per share unchanged and values its assets mainly at amortised cost. It must hold at least 10% of assets maturing daily and 30% weekly.
An LVNAV Fund Keeps a Constant Price Within 0.20%
An LVNAV can deal at a constant price only while that price stays within 20 basis points (0.20%) of its NAV at market value. Beyond that, the next deals use the market price (Article 33). It can hold bank and corporate paper as well as government debt, which adds credit risk. The CSSF found that no short-term LVNAV in Luxembourg moved more than 20 basis points from its constant price in 2025.
A VNAV Fund Prices Its Shares at Market Value
A VNAV prices its shares daily at market value, so the price moves a little. A short-term VNAV needs at least 7.5% of assets maturing daily and 15% weekly. It may hold up to 10% with one issuer, as long as those larger positions total no more than 40% of assets (Article 17(2)).
Short-Term and Standard Funds
A short-term fund keeps its weighted average maturity (WAM) to 60 days and its weighted average life (WAL) to 120 days (Article 24). WAM shows how soon holdings mature or reset their rate. WAL shows how soon they are repaid. A standard fund may run a WAM of 6 months and a WAL of 12 months (Article 25), may hold some instruments with up to two years left, and must be a VNAV.
Fund type | Share price | Main holdings | Liquidity floor | WAM and WAL limits |
|---|---|---|---|---|
Public debt CNAV | Constant | At least 99.5% government debt, government-backed repos and cash | 10% daily, 30% weekly | 60 days and 120 days |
LVNAV | Constant while within 0.20% of market value | Government, bank and corporate short-term debt, deposits | 10% daily, 30% weekly | 60 days and 120 days |
Short-term VNAV | Moves daily with market value | Government, bank and corporate short-term debt, deposits | 7.5% daily, 15% weekly | 60 days and 120 days |
Standard VNAV | Moves daily with market value | As short-term VNAV, plus some instruments with up to 2 years left | 7.5% daily, 15% weekly | 6 months and 12 months |
The table shows the trade-off. Public debt CNAV and LVNAV funds must keep the most cash close at hand, while standard funds lend for longer, which can pay more but moves the price more. In Luxembourg at the end of 2025, short-term LVNAVs held 57% of fund assets, standard VNAVs 19%, public debt CNAVs 13% and short-term VNAVs 10%, according to the CSSF.
Sophic
Treasury management
Yield
2% to 3%+ p.a
Fees
0.3% a year + €10 per order
Eligibility
EU/EEA businesses with an LEI
When investing, your capital is at risk. Yields may vary.
Money Market Fund Risks and the Rules That Limit Them
A fund can lose value. Its holdings can default, it can struggle to pay out when many investors sell at once, and its return falls when rates fall. EU rules reduce these risks with liquidity floors, issuer limits, stress tests and a ban on outside support. They do not remove them.
A Fund Can Lose Value
The Reserve Primary Fund in the US held $785 million of Lehman Brothers debt when Lehman failed. On 16 September 2008 it announced it would price its shares at $0.97 instead of $1.00, and it suspended redemptions from 17 September, according to the SEC. By January 2010, investors had received more than $0.98 per dollar. In the week of 15 September 2008, investors pulled about $300 billion, 14% of assets, out of US taxable prime funds.
Funds Come Under Pressure When Everyone Sells
In March 2020, LVNAV and VNAV funds in the EU recorded very high outflows while the markets for commercial paper and certificates of deposit dried up, ESMA reported on 14 February 2022. These funds hold more than half of the commercial paper market. Outflows slowed once the ECB, the Bank of England and the Federal Reserve stepped in. No EU or US fund had to charge liquidity fees, gate or suspend redemptions, but ESMA concluded the weak points remain.
No Sponsor Can Prop Up the Fund
Article 35 bans external support. Nobody, including the bank or asset manager behind the fund, may inject cash, overpay for its assets, buy its shares to support it, or guarantee it in any way. In 2007 and 2008, all but one of the US funds hit by losses on structured vehicles and Lehman debt got support from their sponsors, the SEC noted. In the EU that route is closed, so a fund's value reflects its holdings alone.
Liquidity Rules Set a Minimum Cash Buffer
Article 34 gives LVNAV and public debt CNAV funds tools for heavy selling. When weekly assets fall below 30% and one day's net redemptions top 10% of assets, the board can charge liquidity fees, limit redemptions to 10% a day for up to 15 working days, or suspend them for up to 15 working days. Every fund must also stress test itself at least twice a year (Article 28).
These tools protect the investors who stay in. For cash needed on a set day, they are a reason to keep that money in the bank, the core of good liquidity management.
Fund Shares Sit Outside the €100,000 Deposit Guarantee
The EU Deposit Guarantee Schemes Directive 2014/49/EU covers deposits up to €100,000 per depositor, added up across all your accounts at one bank (Articles 6 and 7). Fund shares are not deposits, so this cover never applies. Our guide to deposit guarantee schemes for business accounts explains the bank side.
Read more: how companies manage treasury risk.
Invest Company Cash in Money Market Funds
The best money market funds for your company depend on your cash forecast. We set up the account with our regulated partner.
- Matched to your forecast: Reserve cash in funds, cash with a set date in bills.
- Currency matched: Hold each balance in the currency of the costs it will pay.
- Fixed dates covered: Treasury bills from 2.5% p.a. for cash with a known use date.
- Longer horizons: Government bonds from 3% p.a. with regular interest payments.
- Clear fees: A small yearly fee and a flat charge per order, shown before you invest.
When investing, your capital is at risk. Yields may vary.
How to Judge the Best Money Market Funds
The best money market funds for a business match when it needs the cash, the currency it pays in and the risk it can accept. Ranking the best money market funds by yield alone misses most of that. A better test looks at fund type, currency, credit quality, maturity, net yield, dealing terms and size.
Match the Fund Type to When You Need the Cash
Cash you may need within days or weeks suits a short-term fund, and public debt CNAV and LVNAV funds carry the highest liquidity floors. Cash you will not touch for six months or more can go into a standard fund, which lends for longer and whose price moves more. The best money market funds for payroll cash are rarely the best money market funds for a reserve held for a year.
Hold the Fund in the Currency You Spend
A US dollar fund often pays a different rate from a euro fund, but for a euro-based company that gap is not free money. If the euro rises against the dollar while you hold, the currency loss can wipe out the extra yield. Hold each balance in the currency of the costs it will pay.
Check Credit Quality and the Rating
The weekly report shows the credit profile, and the manager must run its own credit assessment of what it buys (Articles 19 to 22). S&P Global's top rating for these funds, 'AAAm', describes an "extremely strong capacity to maintain principal stability and to limit exposure to principal losses due to credit risk." A rating is an opinion, not a promise, and Article 26 makes a fund disclose when it paid for its own rating.
Read WAM, WAL and Liquid Assets Each Week
A lower WAM means the yield adjusts faster when rates change and the price moves less. A lower WAL means less time exposed to each borrower. A short-term fund at a WAM of 55 days is close to its 60-day cap. Check liquid assets against the floors above too. The CSSF reported average liquidity well above those floors in Luxembourg in 2025.
Compare Net Yield and Dealing Terms
Compare funds on the weekly net yield, not a gross yield or a past high, then add any fee from the service you invest through. On €1,000,000, a gap of 0.10% is €1,000 a year. Also check the cut-off time, how fast cash arrives after a sale and when the fund can charge liquidity fees or limit redemptions. When investing, your capital is at risk. Yields may vary.
Check Fund Size and Who Else Is Invested
Large investors leaving at once is what drains a fund, and Article 27 makes managers plan for it. In Luxembourg, the five largest investors held 24% of a fund's NAV on average at the end of 2025, the CSSF reported. Ask the manager how concentrated its investors are.
What to check | Where to find it | What it tells you |
|---|---|---|
Fund type, short-term or standard | Prospectus and every fund document | How the price behaves and how long the fund can lend |
Currency | Share class name and factsheet | Whether you take exchange rate risk |
Credit profile and rating | Weekly report and the rating agency | How much credit risk it holds |
WAM, WAL and liquid assets | Weekly report | How fast the yield follows rates and how much cash is ready |
Net yield and charges | Weekly report and key information document | What you actually earn |
Dealing terms | Prospectus | When you can sell and when the cash arrives |
Fund size and investor mix | Factsheet or the fund manager | How exposed it is to a few large sellers |
No single fund wins every row. Among the best money market funds for one company, the one with the highest yield may run a longer WAM or hold more bank debt. A ranked list cannot tell you which fund suits your cash. Your own forecast can.
Read more: money market funds for companies and money market fund vs savings account.
Sophic
Treasury management
Yield
2% to 3%+ p.a
Fees
0.3% a year + €10 per order
Eligibility
EU/EEA businesses with an LEI
When investing, your capital is at risk. Yields may vary.
Where a Money Market Fund Fits in Company Cash
So what is a money market fund for in a company? Usually the reserve: cash not needed for this month's payments that still has to be reachable within days. Operating cash stays in the current account. Cash set aside for a known date further out can go into Treasury bills or bonds that mature in time.
Start from a rolling cash forecast, the base of cash flow management. Keep the next one to two months of payments in your current account or EMI account, size the reserve with our guide on how much cash reserves a business should have, and write the split into your treasury policy. Our guide to what treasury management is covers the wider job.
Businesses That Build Up Cash Before They Spend It
Any business where money arrives well before it goes out can use a fund for the gap.
Business | Cash that builds up | Why a fund can fit |
|---|---|---|
Premiums and reserves for future claims | Most claims are paid over months, some at short notice | |
Fees paid a term or a year ahead | Salaries go out monthly, so the balance runs down in steps | |
Grants, large gifts and the board's reserve | The reserve must stay reachable if income drops | |
A funding round paid in at once | Runway is spent month by month over a year or more | |
Annual plans paid upfront | The cost of serving those customers comes monthly | |
Cash left after peak season | The next big stock order is weeks or months away | |
Exporters paid in US dollars | Dollar receipts from customers abroad | A dollar fund keeps it in dollars until dollar costs fall due |
Holding companies after a sale | Proceeds from selling a business or property | The next deal or dividend may take months to agree |
Any profitable company | Corporate tax building up during the year | Due on the tax date, often months after the year end |
In every row, the cash has a job but no fixed date, or a date that can move. That is the money a fund suits. Cash with a firm date six months away may do better in a Treasury bill maturing just before it.
A Fund Sits Between a Bank Account and Government Debt
Factor | Business savings account | Money market fund | Treasury bills | Government bonds |
|---|---|---|---|---|
Typical return | 0.61% euro area average on corporate overnight deposits (ECB, August 2026); 2.24% on deposits fixed up to 1 year | From 2% p.a. with our partner, variable | From 2.5% p.a. with our partner, fixed to maturity | From 3% p.a. with our partner, fixed coupon |
Access to cash | Same day on demand accounts; notice or term on others | Sell on any dealing day | Repaid at maturity or sold earlier at market price | Repaid at maturity or sold earlier at market price |
Lock-in | None on demand accounts; notice or term for higher rates | None with our partner | None with our partner | None with our partner |
Deposit guarantee cover | Up to €100,000 per bank | None, not a deposit | None, not a deposit | None, not a deposit |
Main risk | Bank failure above €100,000, low return | Holdings can lose value, returns fall with rates | Issuing government's credit, price moves if sold early | Price falls when rates rise, more on longer bonds |
A fund gives up the €100,000 deposit cover in exchange for a return close to market rates and access within days. Treasury bills pay a fixed rate if held to maturity, and government bonds pay more for tying money up longer, with more price risk, as our guide to Treasury bills vs bonds explains. Many companies pair a fund for the reserve with bills for dated cash. When investing, your capital is at risk. Yields may vary.
Have an Active LEI Before You Invest
Our regulated treasury partner asks every company for an active LEI at onboarding. EU rules require one before an investment firm carries out reportable trades for a company, such as buying Treasury bills (Article 13(2) of Delegated Regulation (EU) 2017/590). GLEIF describes the LEI as a 20-character code under ISO 17442, renewed every year. See what an LEI number is and who needs an LEI number.
Read more: where to put business cash for the short term and business savings accounts.
What a Money Market Fund Costs
A fund takes its running costs from its own assets, so they lower the return you see instead of arriving as a bill. The service you invest through may add a yearly fee and a fee per order. Even the best money market funds lose part of their return to these charges, so check the total.
Cost Types to Ask About
Cost | How it is charged | What to check |
|---|---|---|
Fund ongoing charges | Taken from the fund's assets every day | The cost figure in the key information document |
Service or platform fee | A yearly percentage of your invested balance | What it includes, such as custody and reporting |
Order fee | A flat amount per buy or sell | How often you plan to move cash |
Currency conversion | A margin on the exchange rate | Only if the fund's currency differs from your account |
Liquidity fee | Charged on sales only when a fund is under stress | The conditions in the prospectus |
LEI | Paid to an LEI issuer and renewed every year | The renewal date, so it never lapses |
For cash that stays invested, ongoing charges and the yearly fee matter most. Order fees matter if you move money often, and liquidity fees apply only under stress.
What Costs Do to a Money Market Fund Return
Assume a company keeps €400,000 in a fund for a year at 2%, the starting yield our partner quotes for these funds. That earns about €8,000. With assumed total costs of 0.3% a year and two order fees, about €6,780 is left. The same €400,000 at the ECB's August 2026 average of 0.61% on corporate overnight deposits earns about €2,440.
Costs weigh more when yields are low. A yearly cost of 0.3% takes 15% of a 2% return, but 30% of a 1% return. Compare net yields after every charge. When investing, your capital is at risk. Yields may vary.
Read more: why most business current accounts pay so little.
Check Your Eligibility to Invest Company Cash
Most EU and EEA companies with spare cash can start quickly. We confirm the details with you before onboarding begins.
- EU or EEA company: Our partner onboards businesses based in the EU and EEA.
- LEI checked early: We tell you upfront if you still need one.
- Documents listed once: One clear list of what to send, with no repeat requests.
- Sector screened first: Excluded industries are flagged on the first call.
- Live in days: Cash is invested 2 to 3 business days after onboarding.
When investing, your capital is at risk. Yields may vary.
Common Money Market Fund Mistakes
Most mistakes with these funds come from treating them like a bank account or choosing them on one number. Each of the three below has a real cost in return or in access to cash, and each is easy to avoid once you know it.
Treating Fund Shares Like a Deposit
Some boards assume a fund is a deposit with a better rate. It is not. If a company moves €600,000 from its bank into a fund, none of that money sits under the €100,000 deposit cover any more, and the fund carries no guarantee. That can still be the right move, since the money is spread across many issuers. But the treasury policy should record it as an investment, with a limit per fund and a rule on which fund types are allowed. Agree this before the first purchase, not after a board member asks.
Picking a Fund on Yield Alone
A yield table is not a list of the best money market funds for your cash. The fund at the top is often there for a reason. It may run a longer WAM, hold more bank paper, or be a standard fund that can lend for 6 months on average instead of 60 days. For a reserve that must be ready within a week, an extra 0.05% on €500,000, or €250 a year, rarely justifies that. Start from the fund type and liquidity you need, then compare net yields inside that group. When investing, your capital is at risk. Yields may vary.
Forgetting the Dealing Cut-Off
A sell order placed after the cut-off is dealt on the next dealing day, and settlement may add another day. If payroll or a VAT payment is due that morning, the business ends up overdrawn or paying late, and the overdraft interest can cost more than the fund earned that month. The fix is simple. Keep the next one to two months of payments in the current account, put each fund's cut-off and settlement times in your payment calendar, and sell a few days ahead of any large payment. Check the times again whenever you switch funds.
Sophic
Treasury management
Yield
2% to 3%+ p.a
Fees
0.3% a year + €10 per order
Eligibility
EU/EEA businesses with an LEI
When investing, your capital is at risk. Yields may vary.
Bottom Line
A money market fund is a regulated way to earn close to short-term market rates on cash a business does not need this month. It is not a deposit, carries no guarantee, and can fall in value. Judge each fund on type, currency, credit and dealing terms. The best money market funds for a company fit its cash forecast.
What is a money market fund in simple terms?
How do money market funds work?
Are money market funds safe?
What makes the best money market funds?
Can a money market fund lose money?
What is the difference between an LVNAV fund and a VNAV fund?
What is a short-term money market fund?
Is a money market fund covered by the €100,000 deposit guarantee?
How quickly can I sell money market fund shares?
What does a money market fund invest in?
What return does a money market fund pay in 2026?
Is a money market fund the same as a money market account?
How much does it cost to invest in a money market fund?
Sources
- Regulation (EU) 2017/1131 on money market funds, EUR-Lex
- ESMA, Opinion on the review of the Money Market Fund Regulation, 14 February 2022
- EFAMA, Investment Fund Industry Fact Sheet, July 2026 data (published 30 September 2026)
- EFAMA, Equity UCITS attract strong inflows in July, 30 September 2026
- CSSF, MMF Reporting Dashboard 2025 (data at 31 December 2025)
- Investment Company Institute, Money Market Fund Assets, week ended 30 September 2026
- SEC, Release IC-29132, Money Market Fund Reform (2010)
- Federal Reserve Bank of New York, Liberty Street Economics, Monetary Policy and Money Market Funds in Europe, 11 April 2024
- European Central Bank, Key ECB interest rates (checked 6 October 2026)
- European Central Bank, Euro short-term rate (€STR), 5 October 2026
- European Central Bank, Euro area bank interest rate statistics, August 2026 (released 1 October 2026)
- Directive 2014/49/EU on deposit guarantee schemes, EUR-Lex
- FDIC, Understanding Deposit Insurance
- S&P Global Ratings, Principal Stability Fund Ratings
- Commission Delegated Regulation (EU) 2017/590 (RTS 22), EUR-Lex
- GLEIF, Introducing the Legal Entity Identifier
Disclaimer
Binderr does not provide investment services or investment advice. We introduce businesses to our regulated treasury partner and help with the setup. Investment services are provided by Athlos Capital Investment Services Ltd, which is regulated by the Cyprus Securities and Exchange Commission (CySEC, licence 348/17). Client cash is held in segregated accounts at J.P. Morgan, and investment assets are safeguarded by SIX Group.
Every investment is made under the partner's own terms and conditions, fees and risk disclosures, which you review and accept directly with the partner before you invest. The decision to invest is yours. Binderr is not responsible for investment performance, for any loss, or for the services the partner provides.
This article is general information, not investment, tax or legal advice. Figures, rates and rules were checked against the sources listed at the time of writing and can change. When investing, your capital is at risk. Yields may vary.
