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Existing mortgage customers

Borrow more money on your  Royal Bank of Scotland mortgage

You can apply to borrow extra money on your current Royal Bank mortgage. This extra money must be for a clear purpose. Your new payments are added to your usual monthly mortgage payment.

What is additional borrowing?

Additional borrowing is extra money added to your mortgage for an agreed purpose. Here are the key things to know:

  • It’s still a mortgage: The extra money is secured against your home.
  • How much you can borrow: For residential mortgages, we may be able to lend up to 90% of your property’s value.
  • Valuation:  We don't charge a valuation fee for additional borrowing.
  • How you repay it: Your new borrowing is added to your monthly mortgage payment.
  • How long you can borrow for: You can borrow for 3 to 40 years. For interest‑only or Buy to Let mortgages, the longest term is 35 years.
  • If your mortgage deal is ending: If your mortgage deal has ended or is ending soon, you can ask us to put your current mortgage and your new borrowing into one deal.

New to Royal Bank of Scotland? You can check our rates, work out your repayments and even submit an application by visiting our Remortgage to Royal Bank page.

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Got a big plan that needs a bit more money to make it happen?

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Think carefully before securing other debts against your home. Consolidating debt may reduce your outgoings now, however you may pay more interest over your mortgage term.

Complete home improvements

Want to learn more about adding value to your home, the different costs involved and energy saving ideas? Then take a look at our home improvements guide.

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Buy a second/ rental property

Are you looking to buy a second/rental property? Take a look at our second home mortgage options.

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Buy a new or used car

Looking to buy a new or used car? We've put together some tips to help you make the right choice.

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Want help making your debts more affordable?

We can consider lending you money to pay off a number of existing debts and bring together under a single payment with your mortgage. This is known as 'Debt Consolidation'.

How to applying for additional borrowing

Check if you're eligible to apply

  • You have a mortgage with Royal Bank.
  • You're a resident in the UK.
  • You're looking to borrow between £10,000 and £500,000 (If you need a different amount, our borrowing needs tool can help you explore the options.)
  • You're up to date with your current mortgage payments.
  • You're looking to borrow for a minimum term of 3 years.
  • You've made at least one payment on your existing mortgage.​​

How do I apply?

For residential mortgages, you can check if you are eligible, see the cost, and apply online.

Go to Manage your Mortgage in our app or in Online Banking.

What to do:

  1. Log in and select your mortgage 
  2. Select ‘Additional borrowing’

Have a Buy to let mortgage?

If you have a Buy to Let mortgage, you will need to call us to speak to our mortgage team to consider your application.

Need help? Speak to our mortgage team

Call us

Written by: Mortgages Team
Reviewed by: Financial Promotions Approvals team
Last updated on: 27/04/2026