Two banks can quote fixed deposit rates a percentage point apart, and the one with the lower headline number can still leave you with more money at maturity. The advertised annual rate is only one of several numbers that decide what you actually receive, and comparing offers on that number alone is how people end up choosing the worse deal.
Why the Advertised Rate Alone Is Not Enough
A quoted rate tells you the annual pace of return, nothing else. It says nothing about the minimum amount required to get that rate, how long you must lock your money to earn it, when the interest is actually paid to you, whether any fee eats into it, or what happens if the bank auto renews your deposit at a different rate when the term ends. Two offers with identical headline rates can produce different amounts in your account, and two offers with different headline rates can produce the same amount, or even the reverse of what the percentages suggest.
The Annual Interest Rate
Start here, because it is still the baseline every other factor gets measured against. Note the exact figure, and note whether the bank described it as fixed for the full term or subject to change, since some products only fix the rate for an initial period.
Principal and Minimum Deposit
Minimum deposit requirements vary meaningfully between banks. As one real example, checked directly against bank websites on 17 September 2026: CalBank states a minimum of GH¢5,000 to open a fixed deposit, while Stanbic Bank states a minimum of GH¢500. Neither of these banks publishes its actual current interest rate on its website; both say rates are confirmed directly with the bank, and CalBank specifically notes that rates can be "negotiable for funds above certain limits." A rate quoted to someone depositing GH¢100,000 is not necessarily the same rate quoted to someone depositing GH¢1,000, so always confirm the rate for your own amount, not a rate you saw mentioned for a different sum.
Tenor
Tenor ranges also differ by bank. GTBank advertises tenors from 30 to 180 days, Stanbic advertises 30 to 365 days, and CalBank offers fixed terms of 3, 6 or 12 months. A rate quoted for a 12 month tenor is not directly comparable to a rate quoted for a 91 day tenor. Convert both to the same time period before judging which is actually better, using the method in the next section.
Turning the Quoted Rate Into Actual Cedis
The full arithmetic is worked through in detail elsewhere, but the short version: interest is normally principal multiplied by the annual rate, multiplied by the tenor in days divided by 365. Do this calculation for every offer you are comparing, using your own principal and each bank's actual tenor, rather than comparing the quoted percentages directly.
Maturity Amount
The maturity amount, principal plus interest, is the number that actually matters, not the percentage that produced it. A longer tenor at a slightly lower rate can sometimes return more in cedis than a shorter tenor at a higher rate, simply because it has more time to accrue interest. Always compare final maturity amounts on the same principal, not the rates that led to them.
When Interest Is Paid
Payment timing differs across offers, and it rarely appears on the advertised summary. If you need that income along the way rather than in one lump sum at the end, a lower rate with earlier payouts can genuinely suit you better than a higher rate you cannot touch until the term closes. Ask this directly for every offer you compare.
Early Withdrawal Conditions
Ask exactly what happens if you need the money before maturity: whether you lose all accrued interest, only part of it, or pay a separate penalty fee on top. This is one of the most common places savers get caught out, usually because they never asked the question until they actually needed to withdraw.
Fees or Other Charges
Ask whether opening, maintaining or closing the deposit carries any charge. A fee that looks small on its own can meaningfully reduce the real return on a shorter tenor or a smaller principal, where the interest earned is also small in absolute terms.
Automatic Renewal Terms
Find out what the bank does by default at maturity if you give no instructions. Some products default to rolling the balance into a fresh term at that day's going rate, which could sit well below what you originally agreed to. Get a clear answer on this at account opening, since correcting it after an unwanted renewal is far harder than preventing it.
Conditions Attached to Promotional Rates
A headline "special" or promotional rate often comes with conditions that are not obvious from the advertisement: it may apply only above a certain deposit size, only to genuinely new money rather than funds already with the bank, or only for a limited signup window. Ask specifically whether the rate you were quoted applies to your actual situation before assuming it does.
Always Note the Date You Were Quoted
Fixed deposit rates move with broader interest rate conditions and are not fixed indefinitely for new deposits. A rate you were quoted three months ago may no longer be on offer today. Write down the date alongside any rate you are given, and treat a rate without a date attached as unverified.
Comparing Two Offers on an Equivalent Basis
To compare two real offers fairly, put them on the same footing: the same principal, the same tenor (or each converted to its actual cedi return over its own tenor), and account for when interest is paid and any fee involved. Comparing raw percentages without doing this is the single most common reason people misjudge which offer is actually better. The same equivalent basis matters if you are weighing a fixed deposit against a different instrument entirely; a Treasury Bill is structured differently and needs the same careful comparison, not a glance at two percentages.
A Worked Comparison
The two offers below are hypothetical, built only to illustrate the method, not to describe any real bank.
| Bank A (illustrative) | Bank B (illustrative) | |
|---|---|---|
| Quoted annual rate | 20% | 19% |
| Tenor | 182 days | 182 days |
| Minimum deposit | GH¢5,000 | GH¢5,000 |
| Other charges | One time GH¢50 processing fee | None |
| Gross interest on GH¢5,000 | GH¢498.63 | GH¢473.70 |
| Net interest after fees | GH¢448.63 | GH¢473.70 |
| Maturity amount | GH¢5,448.63 | GH¢5,473.70 |
Bank A's headline rate is a full percentage point higher, but its processing fee brings the actual return below Bank B's, once both are worked through to a real maturity amount on the same GH¢5,000. Looking at the rate alone would have pointed to the wrong choice.
A Practical Checklist
- What is the exact annual rate, and is it fixed for the full term?
- What is the minimum deposit for that rate, and does a larger amount qualify for a better one?
- What is the exact tenor, in days?
- What does that work out to in actual cedis on your principal?
- Is interest paid monthly, quarterly, or only at maturity?
- What happens if you withdraw before maturity?
- Are there any account opening, maintenance or closing fees?
- What happens automatically at maturity if you give no instructions?
- If the rate is promotional, does it apply to your amount and your situation?
- What date was this rate quoted to you?
Running through these ten questions for every offer you are seriously considering takes a few extra minutes and is the difference between comparing two real numbers and comparing two advertisements. If you are still getting familiar with how a fixed deposit works in the first place, or want to check how safe a specific offer actually is before comparing further, those are worth reading first. And if you want the whole decision, understanding the product, calculating your real return, comparing it against Treasury Bills, and deciding how much to commit, laid out in one place rather than pieced together from separate conversations with different banks, Fixed Deposits in Ghana walks through all of it.