Do Nothing, and It Almost Always Costs You More
Many homeowners assume the mortgage simply carries on as normal once a fixed deal ends. It does not. Without a new deal arranged beforehand, the loan moves automatically onto the lender’s Standard Variable Rate, almost always a higher one, and monthly payments rise from that point onward.
Knowing what changes, and when to act, decides whether the handover to a new deal goes smoothly or costs several months of paying more than you needed to.
What Actually Happens When the Fixed Term Finishes
A fixed-rate mortgage holds the interest rate steady for an agreed period, commonly two to five years, sometimes longer. The mortgage itself does not end when that period does. The rate applied to it does.
Without a new deal in place, the lender moves the loan onto their Standard Variable Rate, or SVR. This rate moves at the lender’s discretion rather than staying fixed, and it typically sits well above the deals available on the open market. The longer that gap runs, the more it adds to the total interest owed by the time a new deal is finally arranged.
How Much Payments Can Actually Rise
Take a mortgage of £250,000 with 25 years remaining, on a fixed rate of 2.2%. The monthly payment on that deal is £1,084. Move the same balance onto a representative SVR of 6.5% and the payment rises to £1,688, an increase of £604 a month, or just under 56%.
That is the scale of the jump a lender’s reversion rate can produce, and it is why so many borrowers who could technically afford the higher payment still choose to shop around rather than simply absorb it.
When Lenders Tell You, and What the Letter Actually Covers
Lenders do not move a mortgage onto the SVR without warning. Most borrowers receive a notice three to six months before the fixed term ends, setting out the expiry date, the lender’s current SVR, any product transfer options available with that same lender, and how to review alternatives elsewhere.
The letter arrives with enough time to act. Whether it gets acted on is a different question, and letting a fixed rate expire before a replacement is agreed is one of the more common ways borrowers end up briefly on the SVR by accident rather than by choice.
Product Transfer or Remortgage
Two routes exist once the fixed term ends. A product transfer keeps the loan with the same lender on a new deal, usually with lighter paperwork and often without a fresh valuation or full affordability check. A remortgage moves the loan to a different lender entirely, which requires a complete application and valuation but opens up the full market rather than one lender’s own range. Our remortgaging guide covers both in more detail.
The right route comes down to whether the current lender’s own rates still hold up, or whether the wider market has pulled ahead.
What Usually Replaces the Fixed Rate
Most borrowers move onto one of three things once the old deal ends. Another fixed-rate product keeps payments predictable for a further term, a tracker mortgage follows the Bank of England base rate up or down instead, and some lenders offer a discounted variable rate for a short initial period. Our guide to the different mortgage types covers how each of these actually works.
The choice generally comes down to whether payment certainty matters more than the chance of a lower rate that can also move against you.
Why Acting Early Matters
Most lenders let borrowers secure a new rate three to six months ahead of the expiry date, while staying on the current fixed rate until it actually ends. That window gives time to complete an application properly rather than under pressure, and it means watching how rates move rather than settling for whatever happens to be on offer the day the old deal expires.
Waiting carries three real risks. Rates can move against you between deciding to look and actually completing. A short spell on the SVR while a new application processes still costs real money, even if it is brief. And some products get withdrawn or repriced as the market moves, so the deal available today may not still be there in three months.
Getting Advice Before the Switch
Lender criteria on affordability, deposit requirements and product range all differ, and comparing them properly takes more than checking one bank’s website. A broker working across the whole market can identify options a single lender would not offer directly, which matters most for anyone whose income has changed, or whose situation looks different, since the original mortgage was arranged. Our mortgage strategy guide brings this decision together with rate type and timing in one place.
Frequently Asked Questions
When should I start looking for a new mortgage deal?
Most borrowers begin reviewing options three to six months before their fixed rate expires. Many lenders allow a new deal to be secured in advance so it starts the moment the current term ends.
Can a mortgage broker help find better mortgage deals?
Yes. A broker can check deals across many lenders rather than just one bank, which makes it easier to see what is actually available and decide what fits.
Will my mortgage automatically change when the fixed rate ends?
Yes. Without a new deal arranged, the mortgage moves onto the lender’s Standard Variable Rate, which is usually higher than the previous deal and can change further over time.
Can I remortgage before my fixed rate ends?
Yes. Most lenders allow a new deal to be secured three to six months before the fixed term finishes, ready to begin as soon as it does.
How much could my mortgage payment increase when the fixed rate ends?
It depends on the loan size, the remaining term, and the gap between the old fixed rate and the new SVR. On a £250,000 balance moving from 2.2% to 6.5%, the increase comes to roughly £604 a month.
Final Thoughts
The end of a fixed deal does not need to be stressful, but it does need a decision made before it arrives rather than after. Reviewing options a few months early gives time to compare properly and avoid the default outcome of drifting onto a lender’s Standard Variable Rate.
UK Mortgage Broker is a whole-of-market broker helping clients throughout the UK and globally to secure funding on UK property. We are directly authorised and regulated by the Financial Conduct Authority. Your home may be repossessed if you do not keep up repayments on your mortgage.
Call: +44 1628 969 500
Email: info@uk-mortgagebroker.co.uk
Related Pages
- When Is the Right Time to Remortgage? – Timing your next deal around your fixed rate expiry.
- Mortgage Product Switch Guarantee – If we cannot beat your lender’s best rate, we switch you for free.
- Early Repayment Charges – What to check before leaving your deal before it ends.
- Residential Mortgages – Whole-of-market advice for main home purchases across the UK.
- First-Time Buyer Mortgage UK – Deposit bands, affordability and the process from start to completion.