Buy-to-let calculators
Investing in buy-to-let properties as a contractor can be a smart way to build wealth and secure your financial future. With changes in tax and lending regulations, it’s essential to stay informed and make the most of your investment.
Our buy-to-let calculators are here to help you:
- Compare the best BTL mortgage deals on the market
- Assess your mortgage loan potential
- Calculate the minimum letting income required for your loan
- Calculate your Stamp Duty Land Tax (SDLT) liability
Simply input your property details and let the calculators do the rest.
Whether you’re a first-time landlord or expanding your portfolio, knowing your expected rental income is key to making sound investment decisions.

1. Compare the best buy-to-let mortgage deals
2. Buy-to-let mortgage loan amount calculator
Calculate how much you can potentially borrow on a buy-to-let mortgage based on rental income. |
Please note the calculation assumes a stress test rate of 5% and buffer of 125%.
3. Buy-to-let rental income calculator
Buy-to-let mortgages require that the rental income of the property will cover the mortgage interest repayments.
Use our rental calculator to work out the rent required for a buy-to-let mortgage. Please note the calculation assumes a stress test rate of 5% and buffer of 125%.
4. Buy-to-let Stamp Duty Land Tax (SDLT) calculator
If you’re looking at investing in a rental property, you will need to know the stamp duty on a buy-to-let. To calculate how much Stamp Duty Land Tax (SDLT) you’ll pay, use our buy to let stamp duty calculator.
Request a call-back from our specialist BTL team
Complete our call-back form for unbiased advice.
One of our specialist buy-to-let mortgage brokers will call you back the same working day.
To speak to an advisor immediately, please call us on 020 8421 7999
Calculators are just a starting point
Our calculators provide quick estimates to guide you, but they won’t replace tailored advice or a lender’s formal decision. Use them as a helpful first step and let us handle the rest.
What affects your borrowing and repayments? It’s not just about your income. Lenders look at these factors, which shape how much you can borrow and what you’ll pay monthly:
Deposit size and loan term
A larger deposit or shorter term can improve your options.
Credit history
Your track record matters; good credit often means better deals.
Financial commitments
Existing debts or expenses impact affordability.
Dependents
More dependents can affect how much you can borrow.
Contract details
Your rate, contract length, and experience play a big role.
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Ready to take the next step?
Contact our expert team today. Whether you’re exploring options or ready to apply, we’ll guide you to the perfect solution based on your circumstances.