It depends on what calculator you used and what return assumption the calculator used.
Most investment calculators simply assume:
a certain annual return rate,
monthly compounding,
and regular contributions.
They do not guarantee that a specific investment will actually produce that result.
For example, if you entered:
Initial deposit = ₦50,000
Monthly contribution = ₦20,000
the final amount depends heavily on whether the calculator assumed:
5% return,
10% return,
15% return,
etc.
Can Money Market Funds Produce Those Calculator Results?
Yes — but only for modest/realistic projections.
Money Market Funds (MMFs) are generally:
low-risk,
stable,
liquid,
short-term focused.
In Nigeria, conventional MMFs often historically yield somewhere around moderate annual returns depending on interest-rate conditions.
But:
returns fluctuate,
they are not fixed forever,
and they usually do not create very aggressive long-term growth like equities.
Important for You as a Muslim Investor
Most conventional MMFs in Nigeria invest in:
Treasury Bills,
fixed deposits,
commercial papers,
interest-bearing securities.
So from a Shariah perspective, many Muslims avoid conventional MMFs because of riba concerns.
If You Want Halāl Alternatives
You may consider:
1. Islamic/Halal Equity Funds
Like the halal ETF you already mentioned.
These are better for:
long-term growth,
wealth building over 10–20 years.
But:
prices fluctuate more,
short-term volatility is normal.
2. Sukuk
Sukuk can provide:
relatively stable returns,
lower volatility than stocks,
Shariah-compliant structure.
Good for:
medium/long-term investing.
3. Islamic Money Market-Type Products
Available through institutions like:
Jaiz Bank Plc
TAJBank
Lotus Capital Limited
These aim to provide:
liquidity,
lower risk,
halal structures.
Which Investment Matches Calculator Expectations?
Here is a practical comparison:
Investment Type
Risk
Growth Potential
Halal-Friendly?
Conventional MMF
Low
Low–Moderate
Usually problematic
Islamic MMF
Low
Low–Moderate
Better
Sukuk
Low–Moderate
Moderate
Generally acceptable
Halal Equity ETF
Higher
Higher long-term
Generally acceptable
Individual Stocks
Higher
High
Depends on company
Long-Term Reality
If your calculator showed a very large future amount, it was probably assuming:
compounding over many years,
and decent annual returns.
That kind of long-term growth is usually more associated with:
equities,
equity mutual funds,
halal ETFs,
rather than ordinary MMFs.
Example of Compound Growth
Your setup:
₦50,000 initial
₦20,000 monthly
Over time, compounding becomes powerful.
For compound growth calculations, this formula is commonly used:

Where:
= initial deposit
= monthly contribution
= annual return rate
= number of years
The bigger factor is usually:
consistency, not trying to chase unrealistic returns.
A Balanced Halāl Strategy for You
Given your concerns about ethics and Islam, a sensible structure may be:
Goal
Possible Option
Emergency savings
Islamic MMF
Medium-term stability
Sukuk
Long-term wealth growth
Halal ETF/equity fund
That combination balances:
halal compliance,
growth,
and risk management.
One Important Mindset
Do not choose investments only because a calculator showed a big number.
Always ask:
How does the investment generate returns?
Is it halal?
What are the risks?
Is the return realistic?
Can I stay invested consistently for years?
Consistency plus compounding is usually more powerful than chasing the “highest” return.