Rent vs Buy Calculator United Kingdom

Comparing rent with a monthly mortgage payment tells you little. Buying costs a deposit plus a large one-off bill on the way in, and returns equity on the way out. Renting costs the rent and returns nothing. This calculator runs both over the same number of years and reports what each costs once the money you get back is counted.

What the model weighs against what

Renting is simple: monthly rent, twelve months a year, for the years you stay. None of it is recoverable.

Buying has four parts: the deposit, the upfront costs of purchase, a mortgage payment every month you live there, and at the end your equity, which is the grown value of the property minus the loan still outstanding. The net cost of buying is the deposit plus the payments plus the upfront costs, minus that equity. The lower total wins over the period you chose.

Stamp duty and short stays

Transaction tax is the main reason buying and selling quickly is expensive in the UK. It is charged in slices rather than as one rate on the whole price.

In England and Northern Ireland the residential bands are nil up to £125,000, 2% on the slice to £250,000, 5% to £925,000, 10% to £1.5 million and 12% above that. A first-time buyer pays nothing up to £300,000 and 5% from there to £500,000, but loses the relief entirely if the price is above £500,000, one of the sharpest cliffs in the UK tax system. Buying an additional property adds a 5% surcharge on the whole price.

Scotland and Wales have their own taxes. Land and Buildings Transaction Tax in Scotland starts above £145,000. Land Transaction Tax in Wales starts higher, above £225,000, but its first charging band is 6% rather than 2%, so a mid-priced Welsh purchase can cost more in tax than an English one at the same price.

None of this tax is recoverable, which is the main reason owning for two years rarely beats renting.

The rest of the upfront bill

A conveyancer’s fee, local authority searches, Land Registry charges, a survey and often a mortgage arrangement fee all come before you get the keys. Selling later brings estate agency fees and another round of conveyancing. Put your realistic total into the buying costs field, not just the stamp duty, because the model treats that number as spent.

Equity comes from two directions

Each mortgage payment reduces the outstanding balance, and if the property rises in value, your stake grows without any further payment. The calculator amortises the loan to find the balance after the years you stay, grows the purchase price at the rate you enter, and treats the difference as equity.

Ownership looks poor over short horizons because neither source has had time to work. Mortgage interest is front-loaded, so early payments reduce the balance only slowly, and price growth has had only a couple of years to compound against fixed upfront costs. Over a longer horizon both effects grow while the upfront cost stays the same.

What an owner carries that a tenant does not

Council tax is not one of these costs. In England, Scotland and Wales the occupier pays it, so it falls on a tenant just as on an owner and does not change the comparison. In some other countries an annual property tax sits with the owner.

Leasehold costs are the ones to watch. If you buy a flat, ground rent and service charges are yours, and they can be substantial. A short lease is a risk with no rental equivalent, because extending it can be expensive, so check the remaining term before treating any equity figure as reliable.

Repairs, buildings insurance and the boiler are also yours, and none of them appear in the model.

A five-year example

Take a £300,000 property with a £30,000 deposit, a 5% mortgage over 25 years and a five-year stay. Assume prices grow 3% a year and buying costs of £12,000, which on that price covers £5,000 of stamp duty for a buyer who is not a first-time buyer, with the rest for legal, survey and other fees.

The tool amortises the £270,000 loan, totals sixty monthly payments, works out the balance still owed and the grown value of the property, and nets the equity off the cash spent. Buying costs about £28,088 over the five years, against £72,000 of rent at £1,200 a month, so buying comes out about £43,912 ahead. With no price growth the net cost of buying rises to about £75,870, and renting wins by about £3,870.

The inputs that move the answer

The years you stay matter most, because the upfront costs are fixed and each extra year spreads them thinner. House price growth comes next, and it has large leverage because it compounds on the full £300,000 rather than on your £30,000 stake. The mortgage rate is third, since a higher rate sends more of each payment to interest instead of the balance.

Change one input at a time. Within a few runs it is usually clear which assumption your decision rests on.

Limits of the model

The model is deliberately simple. It excludes maintenance, repairs, buildings insurance, ground rent and service charges. It holds rent flat rather than raising it each year, which favours renting. It gives renting no credit for the return you could earn by investing the deposit. It assumes one mortgage rate for the whole period, while most UK deals fix for two or five years and then revert to a variable rate, a material simplification over a long horizon. Because equity depends heavily on a growth rate that can be negative, treat the output as a structured way to think rather than a forecast. Run several scenarios, then weigh them against what a calculator cannot price: security on one side, flexibility on the other.

About This Rent vs Buy Calculator

Use this rent vs buy calculator to get an instant estimate based on the figures you enter. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.