Employer FBT on a cheap staff loan, using the prescribed market rate.
FBT due (annual)
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Taxable benefit (annual)
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Benefit per month
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Market rate used
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When a cheap staff loan becomes a taxable perk
A generous employer that lends staff money at a soft rate is, in the eyes of the KRA, handing over a benefit. The employee enjoys interest cheaper than the market offers, and that saving has value. Fringe benefit tax exists to capture it. The mechanics are specific to loans: the taxable benefit is the loan multiplied by the gap between the KRA prescribed market interest rate and the lower rate the employer actually charges. Crucially, in Kenya this tax falls on the employer, not the worker. The company computes the benefit, applies the corporate rate, and remits it. So when finance teams price a staff loan scheme, FBT is a real cost they carry, and this tool sizes it for them.
The prescribed rate does the heavy lifting
Everything turns on the prescribed market interest rate, a figure the KRA publishes and revises quarterly to track market conditions. The wider the gap between that benchmark and the rate you charge, the bigger the benefit and the bigger the tax. Charge employees the full market rate and the gap is nil, so there is no benefit and no FBT at all. Charge them nothing and the entire prescribed rate becomes the benefit. Because the benchmark moves every quarter, a loan that triggered little tax last quarter can attract more this quarter even though nothing about the loan changed. That volatility is the main reason to recompute FBT each period rather than set it once and forget it.
A KES 1 million loan at 3 percent
Picture an employer lending a manager KES 1 million and charging 3 percent interest. With the prescribed market rate this calculator applies set at 9 percent, the benefit and tax fall out as below.
| Step | Working | Result |
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So the employer's tax cost for offering that loan is KES 18,000 a year, the corporate rate this calculator applies multiplied by the KES 60,000 benefit. Notice how the benefit is only the interest gap, not the whole loan or the whole interest. The chart breaks the KES 60,000 benefit into the portion that becomes tax and the portion that does not.
A point finance teams sometimes miss: the benefit is calculated on the loan balance, so as the employee repays principal, the balance shrinks and the monthly benefit falls with it. Modelling FBT off the original principal for the whole term overstates the cost on an amortising loan. The other common slip is charging zero interest as a kindness, which maximises the benefit and the tax rather than minimising it. The 9 percent prescribed rate and the 30 percent corporate rate used here are the figures this calculator applies, and the prescribed rate in particular changes every quarter, so always pull the current rate from the KRA before computing a real return.
Does the employee pay anything on a cheap loan?
For the loan benefit itself, the FBT charge sits with the employer at the corporate rate, so the employee is not separately taxed on the interest saving. That is what makes staff loans an attractive perk for the worker. Other non-cash benefits can be taxed on the employee, but the low-interest loan benefit is handled through employer FBT.
How often must FBT be worked out and paid?
FBT is accounted for monthly and remitted alongside other payroll taxes, and because the prescribed market rate is revised quarterly, the benefit can change between quarters. Recalculate when the KRA updates the rate or when the loan balance changes materially, rather than relying on a single annual estimate.