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Mortgages

Mortgage calculators

NatWest mortgages are available to over 18s. Your home or property may be repossessed if you do not keep up repayments on your mortgage.

Looking for a new mortgage?

Learn how much you could borrow and see how changes to your mortgage could affect your repayments. Use our online mortgage calculators to see potential mortgage rates and compare monthly payments. Our tools are all free to use.

Agreement in Principle

Get a personalised indication of how much you could borrow without impacting your credit score. Takes less than 10 minutes.

Mortgage Calculator

Find out what we may be able to lend you and what your monthly repayments could be. Takes less than five minutes.

Mortgage rate finder

Compare our mortgage rates and products. Get an indication of product fees and what your monthly repayments could be.

Interest rate changes

Are your interest rates changing? You could use our calculator to get an indication of how your payments might change.

Mortgage calculators for homeowners

If you already have a mortgage with us or want to work out more about your borrowing, we have some calculators that can help.

Home equity calculator

Already own your home? Calculate the amount of equity you have in your property in as little as a minute.

Overpayment calculator

See how you could save money by making regular monthly overpayments or paying a lump sum (subject to the terms of your mortgage).

Additional borrowing calculator

Already have a mortgage with us? Log into 'Manage your Mortgage' to calculate how much extra you can borrow on your existing mortgage.

Remortgage calculator

Is your current mortgage deal coming to an end soon? See how your repayments could change when your current interest rate ends.

Questions about our mortgage calculators

Need some help?

Call us

We're on hand to arrange a phone or video call with one of our qualified mortgage professionals. We can also help with any general queries about the process. 

Call us on ${dn-0800 096 9527} 

Relay UK: 18001 0800 096 9527

Opening hours: Mon-Fri 8am-6pm, Sat 9am-4pm, Sun Closed. Excluding public holidays.

Buy to Let? We only provide Buy to Let mortgages online for small portfolio landlords.

  • Please use our tools and guidance designed to help you complete your mortgage application online.
  • We do not provide advice on Buy to Let mortgages but if you need technical help with your online application, get in touch so we can provide support.
  • If you are not a small portfolio landlord, or you wish to apply with a mortgage professional, NatWest Buy to Let mortgages are available via mortgage brokers.