How to Read a Kenyan Money Market Fund Rate (Without Getting Fooled)

By Nash ·5 min read ·Updated 7 Jun 2026

Important

Executive Summary:

• The same fund shows wildly different rates online because sites quote different numbers (gross vs net, different dates) and rarely say which.
• A 15% withholding tax plus a management fee sits between the advertised “gross” rate and what you actually keep.
• Learn three things, daily-yield vs effective-annual, gross vs net, and the date, and you can compare any two funds honestly.

Wanjiku has KES 50,000 she finally managed to save, and she wants it to grow. So she does what any sensible person does: she Googles “best money market fund Kenya.” Up come a dozen ranked lists. One shows Sanlam at 9%. Another shows the same Sanlam fund at 15%. A third ranks Cytonn number one at 16.9%, but a fourth puts Cytonn nearer 11%.

Same funds. Different numbers. So who is lying?

Almost nobody. They are quoting different numbers, measured in different ways, on different dates, and most of them never tell you which. That confusion costs real money: people chase the biggest headline, lock their savings into the wrong fund, and are surprised when far less than the advertised percentage actually reaches their M-PESA.

This guide gives you the one durable skill those ranked lists assume you already have: how to read a rate.

The 3 things a single “rate” is hiding

Whenever you see one percentage next to a fund, three different decisions are buried inside it. Learn these and the conflicting tables suddenly make sense.

1. Daily yield vs effective annual yield

Kenyan MMFs accrue interest every day. The daily yield is roughly today’s snapshot, annualised. The effective annual yield assumes you stay invested and your interest keeps earning interest for a year, so it is always a little higher. Madison, for example, has been quoted at a 9.82% daily yield but a 10.32% effective annual yield. Same fund, two honest numbers. Always check which one a table is showing.

2. Gross vs net (the single biggest trap)

A gross rate is before fees and tax. A net rate is what you actually keep. The gap is large, and it is why “Sanlam is 9%” and “Sanlam is 15%” can both be roughly right: one is quoting a net figure, the other a gross one. If a table does not say, assume it is showing you the flattering gross number.

3. The 15% withholding tax (and the fee)

Kenya deducts a 15% withholding tax on MMF interest, at source. The fund manager removes it before the interest reaches you, and it is charged on the interest earned, not on your principal. On top of that sits an annual management fee (often around 1.5% to 2%). So a 16% gross headline is really closer to 13.6% before fees, and lower after them. (The tax is painless and final, see how MMF interest is taxed in Kenya.)

Turn any advertised rate into what actually hits your M-PESA

Here is the only arithmetic you need. Take a gross headline, remove the 15% tax and the fee, and you have your real, net return. Worked on a tidy KES 100,000 held for a year:

The shortcut: net is roughly (gross x 0.85) minus the fee%. Multiplying by 0.85 applies the 15% tax in one step, and it is the fastest way to sanity-check whether a “best rate” headline is gross or net. Run that on every fund you compare, the Sanlam Money Market Fund included, and you are finally comparing the same number, net of everything, instead of one fund’s marketing headline against another’s tax-adjusted figure.

A snapshot, and why you must not trust it blindly

Below is one publicly published ranking, shown only to demonstrate what these tables look like and how to read them, not as an endorsement. These are gross figures (before the 15% tax and fees), as reported for early 2026. Rates have been falling since, so treat every number as out of date the moment you read it.

Warning

Read this as a lesson, not a leaderboard. A different source, dated a few weeks earlier, put Sanlam nearer 9% and Cytonn nearer 11%, because it was quoting net figures from a different week. Neither is wrong. The takeaway: never compare a number from one site against a number from another. Pick one source, confirm the date, confirm gross vs net, and check the fund’s own official fact sheet before you move money.

Why the highest number is often not the right pick

Yield is one column, and for most people it is not the most important one. Before you chase the top of a table, weigh liquidity (most Kenyan MMFs pay out in 1 to 4 working days, some same day to M-PESA up to the standard daily limits), stability and size (a large, long-established fund is less likely to surprise you), minimums (some funds start as low as KES 100), and regulation (only invest in funds licensed by the Capital Markets Authority).

This is where a fund like the Sanlam Money Market Fund earns its place. It is rarely the single highest headline on a list, but it pairs a solid net yield with the scale, the CMA-regulated track record, the daily interest, and the reliable liquidity that actually matter when it is your money. The point is not to win a leaderboard. The point is to understand exactly what you own.

From a rate to a plan

Knowing a fund pays “about 11% net” is abstract. Knowing the date your money market fund income could cover your monthly expenses is not. Once you can read a rate honestly, the free MMF PRO terminal turns it into a plan: enter your contributions and watch what they compound into, and see your Freedom Date move closer. Understanding beats hype, and a plan beats a number you cannot interpret.

Your 5-minute checklist before you pick a fund

1. Confirm the fund is licensed by the Capital Markets Authority.
2. Find the date of the rate. No date means ignore it.
3. Confirm whether the rate is gross or net. If unsure, assume gross.
4. Convert to net: (gross x 0.85) minus the fee%. Now compare like with like.
5. Check withdrawal time, the minimum, and the manager’s fact sheet, then open your Sanlam MMF account and let the daily interest start working.

Keep reading: new to all this? Start with the complete beginner’s guide. Otherwise, see where to put your money, compare this week’s best MMF rates, check whether an MMF is safe, turn a rate into your Freedom Date, or if you earn in dollars, compare USD money market funds.

Frequently Asked Questions

Why does the same fund show different rates on different websites? Because the sites quote different things: a gross rate on one, a net rate on another, often from different weeks. A rate without a date and a “gross or net” label is close to meaningless.

What is a “good” net MMF rate in Kenya right now? It moves with interest rates and has been easing through 2026. Rather than chase a single headline, convert each fund to its net figure with the (gross x 0.85) minus fee shortcut and compare the funds on the same basis.

Is the 15% withholding tax extra, on top of fees? Yes. The fund deducts the 15% tax on your interest at source, and the manager’s annual fee is separate. Both sit between the gross headline and what you actually keep, which is why the net number is the only one worth comparing.

Is my money safe in a money market fund? A CMA-licensed MMF is low risk and invests in short-term instruments like Treasury bills and bank deposits, but it is not capital-guaranteed like a bank deposit. Always verify a fund’s licence and read its fact sheet first.

Calculate your exact Freedom Date free → Open the MMF PRO Terminal