Banks Can’t Just Raise Your Loan Interest—Court Rules
For years, many Kenyan borrowers have shared the same frustrating story: you take a loan at one interest rate, make your repayments faithfully, and then—almost without warning—the amount you owe starts climbing. No renegotiation. No meaningful explanation. Just a notice from the bank saying the interest rate has been “adjusted” under the loan agreement you signed.
On 28 June 2024, the Supreme Court of Kenya finally addressed this long-standing grievance in Stanbic Bank Kenya Ltd v Santowels Ltd [2024] KESC 31. The Court delivered a judgment that could reshape the relationship between banks and borrowers across the country. Its message was clear and unmistakable: banks do not have unfettered power to increase loan interest rates, even if the contract appears to allow it.
This decision is not just about one bank or one borrower. It speaks directly to thousands of Kenyans—individuals, SMEs, and corporations—who have watched their loan balances balloon over time and wondered whether it was all lawful.
How the dispute began
The case started in a very ordinary way. Santowels Ltd borrowed money from Stanbic Bank Kenya Ltd under loan agreements that included clauses allowing the bank to vary interest rates. Such clauses are common in banking contracts and are often presented as standard, non-negotiable terms.
Over time, Stanbic adjusted the interest rates on the loan. The bank notified Santowels of the changes, and Santowels continued servicing the loan. For years, everything appeared routine.
However, doubts eventually crept in. Santowels commissioned an independent audit of the loan account. The audit revealed something alarming: the bank had charged interest in excess of what should have been lawfully applied. Armed with this information, Santowels challenged the bank, setting off litigation that would travel from the High Court, through the Court of Appeal, and ultimately to the Supreme Court.
The bank’s argument: “You signed the contract”
Stanbic Bank’s defence was straightforward—and, as the Supreme Court would later observe, deeply problematic. The bank argued that the loan agreements expressly allowed it to vary interest rates at its discretion. Santowels had signed those agreements. Therefore, the borrower was bound by them.
This line of reasoning will sound familiar to many borrowers. Banks frequently rely on contract clauses to justify interest changes, often implying that once you sign, you surrender any right to question later adjustments.
But the Supreme Court was not persuaded.
What the Supreme Court decided
At the heart of the judgment was section 44 of the Banking Act. This provision requires banks to obtain approval from the Cabinet Secretary responsible for finance before increasing interest rates or other charges.
The Supreme Court held that this statutory requirement is not optional and cannot be overridden by private contracts. Even where a loan agreement grants a bank discretion to vary interest rates, that discretion must be exercised within the bounds of the law.
The Court emphasized several key principles:
- Statutory safeguards override contracts
A contractual clause cannot defeat a clear statutory requirement. Parliament enacted section 44 precisely to protect borrowers from arbitrary or exploitative practices. - Bank discretion is not absolute
Discretion must be exercised lawfully, reasonably, and in good faith. It cannot be arbitrary or unchecked. - Notification is not the same as approval
Merely informing a borrower that interest has been increased does not cure the illegality if the required approval was never obtained.
In firm language, the Court rejected the idea that consent at the point of signing a loan agreement amounts to blanket permission for future interest hikes outside the law.
Why this ruling matters for borrowers
This judgment has far-reaching implications, especially for ordinary Kenyans and small businesses.
Many borrowers have long assumed that once interest is increased and payments are made, the issue is closed forever. The Supreme Court has now clarified that unlawful interest charges do not become lawful simply because time has passed or because the borrower paid under protest—or even without protest.
The Court confirmed that where overcharging is proved, borrowers are entitled to remedies. These may include:
- Refunds of unlawfully charged interest
- Recalculation of loan balances
- Damages in appropriate cases
In other words, money that was wrongly taken does not automatically belong to the bank.
A regulated act, not a private arrangement
Perhaps the most important takeaway from this case is the Court’s clear declaration that interest rate variation is a regulated act, not a purely private matter between a bank and its customer.
Banks operate within a tightly regulated sector because their decisions affect livelihoods, businesses, and the broader economy. By insisting on Cabinet Secretary approval, the law injects public oversight into what might otherwise be an unequal bargaining relationship.
The Supreme Court’s decision reinforces the idea that financial power must be exercised responsibly and within legal limits.
What borrowers should do now
If you have ever noticed unexplained increases in your loan interest or rising balances that do not align with your understanding of the agreed rate, this judgment is a wake-up call.
Borrowers should consider:
- Requesting full loan statements and interest computations
- Reviewing loan agreements alongside applicable banking regulations
- Seeking independent audits where discrepancies are suspected
- Obtaining legal advice on whether interest increases complied with section 44 of the Banking Act
While each case will turn on its own facts, the legal principle is now settled at the highest level.
A line drawn by the Supreme Court
The Supreme Court of Kenya has drawn a clear line in the sand. Banks cannot “just” wake up and increase your loan interest because a clause in the contract seems to allow it. The law demands more—approval, accountability, and fairness.
For borrowers who felt powerless, unheard, or resigned to losing money forever, this judgment delivers a powerful message: the law is on your side, and unlawful interest charges can be challenged.
In an economy where access to credit is essential but often costly, this decision restores a measure of balance—and reminds banks that discretion without legality has no place in Kenyan law.
