Preparing for Higher Mortgage Payments

Mortgage payment shock is the jump in your monthly payment that can happen when your mortgage rate goes up, most often when a low fixed-rate deal ends. It’s worth knowing about early, because the months before your deal ends are when you have the most choice.

This guide explains why mortgage payments rise, how to work out what a higher rate could mean for you, and the practical steps that may help you prepare. It also covers the options lenders offer if a payment rise is hard to manage, and where to find free help.

£New payment calculatorCompare your payment now with what it could be at a new rateTry it →

What is mortgage payment shock?

“Payment shock” is the name for a sudden, noticeable rise in your monthly mortgage payment. It isn’t a product or a rule. It’s what happens when the interest rate on your mortgage goes up and your payment follows.

The biggest jumps tend to come at the end of a fixed-rate deal. If you fixed when rates were much lower, the new rate on offer when your deal ends could be a lot higher. Because the change happens in one go, it can feel like a shock to your budget, even if you knew the deal was ending.

UK Finance says around 1.8 million customers have fixed-rate mortgages due to expire through 2026. So this is something a lot of homeowners are planning for right now.

Why mortgage payments rise

How and when your payment changes depends on the type of mortgage you have. Our guide to fixed, variable and tracker mortgages explains each type in more detail.

When a fixed-rate deal ends

MoneyHelper explains that your payments on a fixed rate won’t change until the fixed period ends. After that, you move to your lender’s standard variable rate, which is usually higher than most fixed deals. StepChange makes the same point: if you do nothing, you’ll usually be moved to the SVR, which is often higher and can go up or down.

Our guide to what happens when your fixed-rate mortgage ends walks through this moment step by step.

Tracker and variable rates

A tracker mortgage follows Bank Rate plus a set margin. MoneyHelper says that if Bank Rate rises by 0.25%, your tracker rate rises by the same amount, so your payment can change straight away. An SVR is set by your lender and usually follows Bank Rate changes.

%Bank Rate change calculatorSee how a rise or cut in Bank Rate could change your monthly paymentTry it →

How much could your payment go up?

The size of the rise depends on three things: how much you still owe, how long is left on your mortgage, and the gap between your old rate and your new one. The example below shows how big that gap can be.

The table shows the same mortgage at three different rates. The 7% row is there to show how much more a higher variable rate could cost, not to suggest what any lender charges.

Figures are for a £180,000 repayment mortgage over 20 years, rounded to the nearest pound. They’re illustrative only.

There’s some reassurance in the wider picture. UK Finance says 94% of those refinancing in 2026 can move to rates below the stress-test rate they were assessed at when they took out their mortgage. In other words, their lender had already checked they could afford a higher payment. It’s still worth checking your own figures, as your budget may have changed since then.

How to prepare for higher mortgage payments

You can’t control interest rates, but there’s a lot you can do before a payment rise lands. These steps are based on MoneyHelper’s guidance on preparing for a rate change.

1. Find your deal end date Check your mortgage offer or annual statement for when your current rate ends and what type of mortgage you have.
2. Work out your new payment Use a calculator to see what your payment could be at today’s rates, so you know the likely payment rise.
3. Review your budget Look at where your money goes each month and whether you could cut costs or raise income to cover the difference.
4. Build a savings buffer MoneyHelper suggests a savings plan, which could support you if rates go up.
5. Start looking about six months ahead You can usually explore and secure a new deal in the last six months of your current one.
6. Talk to your lender early if you’re worried The sooner you act, the more options you’re likely to have.

Our free fixed rate ending checklist puts these steps in order, with space to note your dates and figures.

Booking a new deal early

One of the simplest ways to soften mortgage payment shock is to avoid any time on your lender’s SVR. Under the Mortgage Charter, lenders that have signed up give customers the chance to lock in a deal up to six months ahead. They also let you ask for a better like-for-like deal right up until your new term starts, if one is available.

MoneyHelper notes that if your deal ends within six months, you can usually book a new rate without committing to it. Most lenders refund the fees if you cancel, but a few charge fees that can’t be refunded, so it’s worth checking first. The FCA says a mortgage offer usually stands for between three and six months, depending on the lender.

Staying with your lender or switching

You can usually move to a new deal with your current lender, called a product transfer, or remortgage to a new lender. The FCA says your current lender usually won’t need an affordability check if you’re up to date with payments, unless you want to borrow more. Most other lenders will want you to pass one.

Our guide on when and why to re-mortgage covers the pros and cons of each route. StepChange suggests comparing deals from your own lender and the wider market, and checking you can still cover your priority bills before you sign.

Can you spread a payment rise?

If a higher payment would stretch your budget, some lenders offer ways to lower it for a while. Lenders that have signed the Mortgage Charter let customers who are up to date with their payments do either of the following without a new affordability check or any effect on their credit score:

• extend their mortgage term to reduce their monthly payments, with the option to go back to their original term within six months
• switch to interest-only payments for six months

The Charter doesn’t cover buy-to-let mortgages. It’s also clear that payments after the support ends may be higher, and the total cost over the life of the mortgage will be higher.

Extending your mortgage term

A longer mortgage term spreads what you owe over more years, so each payment is smaller. The FCA points out that you’ll pay more overall, and if the new term runs past your expected retirement age, your lender may check affordability.

Switching to interest-only for a short time

With an interest-only arrangement, you pay only the interest each month, not the amount you borrowed. The FCA says this can lower payments for a short time, but when you go back to repaying, your payments will be higher than before.

Building a buffer before the payment rise

If your deal ends in a few months, one approach is to start living on the higher payment now. In the example above, the rise was about £237 a month. Setting that amount aside for the last six months of your current deal would build a buffer of about £1,420 before the new payment starts.

Doing this tests whether the new payment fits your budget, while you still have the lower payment as a safety net. If it’s a struggle, you’ll know early, while you still have time to look at your options.

MoneyHelper also notes that paying more than your minimum monthly payment could help. Overpaying reduces what you owe, which can make the next deal a little cheaper. Check your mortgage terms for any limit on overpayments first. Our mortgage overpayment calculator shows how much interest and time overpaying could save.

If you’re worried about higher mortgage payments

If you think you’ll struggle with a payment rise, the most important step is to talk to your lender as early as possible. The FCA says lenders should treat you fairly and give you support tailored to your circumstances. They might temporarily reduce your rate or give you longer to make payments.

Asking for help won’t harm your credit file on its own. The FCA says simply talking to your lender won’t affect it. If you agree to pay less than your contract says, that will be recorded, but so would a missed payment. Your lender should tell you whether an option will be reported.

Under the Mortgage Charter, lenders that have signed up also agree that you won’t be forced to leave your home without your consent, in less than a year from your first missed payment, except in exceptional circumstances.

Free, independent help

You don’t have to work it out alone. These organisations give free help with mortgages and debt:

• MoneyHelper, the government-backed service, which has a debt advice locator to find free help near you
• StepChange, a debt charity with free online debt advice
• Citizens Advice, which MoneyHelper also lists as a source of free debt advice

MoneyHelper says if you’ve missed two or more mortgage payments, now is the time to get debt advice. It also warns against taking out more loans secured on your home, handing back your keys or using sale-and-rent-back schemes without getting free debt advice first.

Support for Mortgage Interest

If you get a qualifying benefit, such as Universal Credit or Pension Credit, you may be able to get Support for Mortgage Interest (SMI). GOV.UK explains that SMI is paid as a loan, normally straight to your lender, and you’ll need to repay it with interest when you sell or transfer ownership of your home. It can’t be used to pay arrears.

♥Free mortgage health checkSee what’s worth looking at before your payments changeStart →

Summary

Mortgage payment shock usually comes when a cheaper deal ends and a higher rate takes over. Knowing your deal end date, working out your likely new payment and looking for a new deal up to six months ahead can take a lot of the surprise out of it. If higher payments would be hard to manage, speaking to your lender early opens up the most options, depending on your circumstances.

Sources

• Bank of England – Interest rates and Bank Rate: our latest decision
• UK Finance – Trends in the Economy and Lending: what global tensions mean for your mortgage
• GOV.UK – Mortgage Charter
• Financial Conduct Authority – Support available for mortgages as interest rates rise
• MoneyHelper – How to prepare for an interest rate change
• MoneyHelper – How will interest rates affect my mortgage?
• MoneyHelper – Help with mortgage payments
• StepChange – My fixed rate mortgage term is ending
• GOV.UK – Support for Mortgage Interest (SMI)

Last updated: 9 November 2026. This guide is general educational information only and is not regulated financial advice.