Compare buying with a mortgage against renting over a holding period.
Cheaper option
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Net cost of buying
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Cost of renting
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The real question is not the rent versus the repayment
People usually compare a monthly rent against a monthly mortgage payment and decide buying is dearer. That misses most of the picture. A mortgage payment is partly interest, which is money gone, and partly principal, which becomes equity you own. On top of that, the house can appreciate, and that gain belongs to you. So the honest comparison is the total cash you sink into each path over the years you actually plan to stay, with the equity you walk away with credited back to the buying side. That is exactly what this tool does, and the holding period is the single most important input you will set.
On the buying side it adds up your deposit, every mortgage payment made during the hold, the one-off stamp duty, and the recurring county land rates, then subtracts the equity you hold at the end. Equity is the appreciated value of the property minus whatever mortgage balance is still outstanding. On the renting side it grows your rent by your chosen rate each year and totals the cheques. The cheaper number wins. Note that the model leaves out repairs, service charges, insurance, transaction costs on a future sale, and the return you might have earned by investing your deposit instead, so read the output as a structural comparison rather than a full cash-flow forecast.
The Kenyan costs baked into the buying side
Two Kenya-specific charges sit inside the buy calculation. Stamp duty on a property transfer is applied at the rate this calculator uses for urban locations, which is 4 percent of the price, with rural transfers attracting a lower rate. That is a sizeable one-off cost the rent path never pays. Then there are county land rates, a recurring property tax levied by the county government on the site value. There is no single national figure for these, so the tool applies an indicative default of about 0.115 percent of value a year, modelled on a Nairobi-style rate. Counties set their own rates and revalue periodically, so treat both the stamp duty rate and the land-rate assumption as the figures the calculator applies and confirm your county's current schedule and any KRA stamp-duty guidance before budgeting.
A KES 10 million home held for seven years
Using the calculator's default inputs, a KES 10 million house with a KES 2 million deposit, an 8 million loan at 13.75 percent over 20 years, against rent of KES 60,000 a month growing 5 percent a year, with the property also appreciating 5 percent a year. Over a 7-year hold the calculator returns the figures below, using the rates this calculator applies.
| Buying side over 7 years | Amount (KES) |
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Buying comes out roughly KES 2.1 million cheaper across the seven years, almost entirely because the deposit and principal repayments rebuild as equity worth nearly KES 7 million by year seven. The chart contrasts the two net figures.
When the answer flips to renting
Shorten the hold to two or three years and buying usually loses. The stamp duty is paid in full whether you stay one year or twenty, early mortgage payments are nearly all interest, and there has been little time for appreciation to build equity. Push the mortgage rate higher, or assume flat house prices, and the scales tip further toward renting. The practical rule the model keeps proving is that buying rewards patience. If your job, your city, or your family situation might move you within a few years, the flexibility of renting can be worth more than the equity you would have slowly built.
Why does the tool not let me invest my deposit instead?
It deliberately keeps the comparison to housing cash flows so the result stays easy to read. In reality a renter could put the KES 2 million deposit into a money-market fund or Treasury bills and earn a return, which strengthens the rent case. If you want the fuller picture, estimate that investment growth separately and add it to the rent side as a credit before deciding.
Should I trust the appreciation rate I typed in?
Be conservative with it. House-price growth in Kenya varies sharply by location and segment, and the default of 5 percent a year is an assumption, not a forecast. Because the buying case leans heavily on appreciation, run the tool twice, once with a modest rate and once with zero growth, and see whether buying still wins in the pessimistic case. If it does, the decision is robust.