Free Investment Tool

Buy-to-Let Profit Calculator

Q: How do I calculate buy-to-let profit?

Buy-to-let profit is calculated by taking your gross rental income, deducting all costs including mortgage payments, letting agent fees, maintenance, insurance and void periods, and then deducting income tax on the rental profit. What remains is your net profit. Dividing this by your purchase price gives your return on investment (ROI).

Q: Is buy-to-let property profitable after tax?

Yes, buy-to-let can be profitable after tax but the tax position depends on ownership structure, income level and finance costs. Since 2017, private landlords can no longer deduct mortgage interest as an expense and instead receive a 20% tax credit. Holding property in a limited company can be more tax-efficient for higher-rate taxpayers, though company mortgage rates and costs are typically higher.

Model your complete monthly cashflow, annual net profit after income tax, and cash-on-cash return on investment for any buy-to-let property. The calculator shows instantly whether the investment generates positive or negative cashflow after all costs and tax.

Property and Income

Purchase Price

Monthly Rent

Void Rate

% of year

4% represents approximately 2 weeks of void per year. Use 0% if you have long-term tenants in place.

Monthly Costs

Mortgage Payment

Letting Agent Fee

Monthly Maintenance

Monthly Insurance

Tax

Income Tax Rate on Rental Profit

Tax on rental profit is simplified here. Your actual tax position depends on allowances, mortgage interest relief rules and ownership structure. Seek advice from a tax adviser or accountant.

This calculator provides a simplified estimate for guidance only. It does not account for all UK landlord tax rules including the mortgage interest tax credit, capital allowances, or company ownership structures. Consult a qualified tax adviser before making investment decisions based on these projections.

Buy-to-Let Profit FAQ

How do I calculate buy-to-let profit?

Take your gross rental income and deduct all costs including mortgage payments, letting agent fees, maintenance, landlord insurance and void periods. The remaining figure is profit before tax. Deduct income tax on that rental profit to reach your net profit. Dividing net annual profit by purchase price gives your return on investment. Use this calculator to model any scenario instantly.

What ROI should I expect from a buy-to-let property?

A cash-on-cash ROI of 4 to 8% net of costs and tax is realistic for well-sourced buy-to-let property in England. Northern English cities typically generate stronger returns than London or the South East. Below market value deals and HMO properties can push ROI significantly higher by combining higher rental income with discounted acquisition costs.

Is buy-to-let property profitable after tax?

Yes, but the tax position varies by ownership structure and income level. Private landlords receive a 20% tax credit on mortgage interest rather than a full deduction. Higher rate taxpayers often benefit from holding property through a limited company where mortgage interest remains a fully deductible expense, though company mortgage rates and additional costs should be factored in. Seek advice from a property accountant before purchasing.

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