Your mortgage fix is ending: how to lock a rate six months early and avoid the SVR

With a UK mortgage, the expensive mistake is rarely a missed payment. It is doing nothing in the final months of a fixed deal. The deal expires on its own; the replacement does not appear on its own. Here is what the payment is made of, which deadlines matter, and which three ways of cutting it need no affordability check at all.

What is your mortgage payment actually made of?

Three things: the outstanding balance, the years left to run, and the rate. You know the first two exactly; the third changes the day your deal ends. The rate itself is the cost of money to the lender — anchored to Bank Rate and to what markets expect it to do — plus the lender's margin, which depends on your loan-to-value. The lower your debt against the value of the property, the cheaper the band you fall into. Bands usually sit at 60%, 75%, 80%, 85%, 90% and 95% LTV.

The practical point: if the property has gained value or the balance has come down over the years of your fix, you may now qualify for a cheaper band than the one you started in. Check that before accepting the first thing your lender offers.

Why do new mortgages cost 4.45% when Bank Rate is 3.75%?

Because Bank Rate is the price of money for banks, not for borrowers. Bank of England figures put the effective rate on newly drawn mortgages at 4.45% in July 2026 — 0.7 percentage points above Bank Rate, and wider than the 4.35% recorded in June. Across the whole outstanding stock the average is 3.97%, because old cheap fixes are still in there, gradually expiring.

The uncomfortable consequence: even if the Bank cuts, your new mortgage rate will almost certainly still be above Bank Rate. Watch lender pricing in your LTV band, not the headline about the base rate.

How do a fix, a tracker and an SVR differ?

A fixed rate is written into the contract for two, three, five or ten years and does not move whatever the Bank decides. A tracker is Bank Rate plus a set margin and moves automatically with each decision, usually from the next monthly payment. A standard variable rate is the lender's own rate, set at its discretion: it does not have to follow Bank Rate in either direction and is typically well above both a fix and a tracker.

Nobody chooses an SVR. It is where you land by default when the fix has ended and no new deal is in place.

What happens on the day your fix ends?

Nothing breaks and nobody demands the balance. From the next payment you are simply on your lender's SVR, and the payment goes up. The gap between an SVR and a current market deal is commonly 1.5 to 2 percentage points, and on a £250,000 balance each percentage point is roughly £2,500 a year in interest alone.

The good news is that an SVR normally carries no early repayment charge, so you can leave whenever you are ready. The bad news is that every month on it costs money, and arranging a new deal takes weeks.

Can you reserve a new rate before your deal ends?

Yes, and this is the single most useful thing in this guide. Under the Mortgage Charter — voluntary commitments signed by 47 lenders covering around 90% of the UK mortgage market — you can lock in a new deal up to six months before the current one expires. If a better equivalent product appears at the same lender before your new deal starts, you can ask to move to it.

Reserving commits you to nothing: you can decline it and go elsewhere. So the sensible sequence is to lock something in at six months as insurance against rising rates, then keep comparing at leisure.

Product transfer with your own lender, or remortgage to another?

A product transfer is a rate change inside the same lender: usually no new valuation, usually no fresh affordability check, done in days, no solicitor. A remortgage is a new loan with a different lender that repays the old one: slower, needs a valuation and legal work, but opens the whole market.

Compare total cost over the deal term, not headline rates: rate plus product fee (often £999 to £1,499) plus valuation and legal costs where they apply. On a small balance, a lower rate with a £1,499 fee frequently loses to a higher rate with no fee. On a large balance the reverse is true. It is five minutes of arithmetic and it regularly surprises people.

What does it cost to leave a fix early?

Whatever your contract says under early repayment charge. It is usually a percentage of the outstanding balance that tapers year by year — say 5% in year one falling to 1% in the final year. The exact figure is in your mortgage offer and your annual statement, and the lender will confirm it by phone.

Check the overpayment allowance separately: almost every lender lets you repay up to 10% of the balance a year with no charge. If cash is sitting at 1.65% while the mortgage costs 4.45%, overpaying within that allowance beats any savings account — provided you keep an emergency fund, because money paid into a mortgage is not money you can take back out.

What if the payment has become unaffordable?

If you are still up to date, the Mortgage Charter gives you two options that require no affordability assessment: switch temporarily to interest-only for up to six months, or extend the mortgage term, with the right to revert to the original term within six months. Both cut the monthly payment straight away.

Both have the same price: total interest over the life of the loan rises, because the capital is repaid more slowly or over longer. These are tools for a difficult few months, not a permanent fix. Talk to the lender before a payment is missed — once you are in arrears, some of these options stop being automatic.

Can the lender repossess if you miss a payment?

Not quickly. Under the Charter, lenders committed not to repossess a home without consent for at least twelve months from the first missed payment, other than in exceptional circumstances. That year is not permission to stop paying; it is time to agree a plan, and courts in England and Wales also look at whether the lender offered a reasonable one.

Missed payments still go onto your credit file and stay there for years, which shapes the rate you are offered on your next mortgage. A phone call a week before the problem is far cheaper than clearing up the consequences a year later.

Have the rules on how much you can borrow changed?

Yes, and in borrowers' favour. In 2025 the FCA reminded lenders that they have flexibility to design an interest-rate stress test appropriate to the individual mortgage rather than applying one blanket threshold. Its PS25/11 rules eased affordability assessments when remortgaging to a cheaper product with a new lender, and allowed borrowers to shorten their term without a full reassessment. Separately, on the Financial Policy Committee's recommendation, lenders can now approach their regulator about increasing high loan-to-income lending.

In practice this means a flat "the rules say no" on a remortgage is less common than it was two or three years ago. If you are declined, ask which specific criterion failed and try another lender.

How many people are remortgaging right now?

In July 2026 the Bank of England recorded 56,100 approvals for house purchase and 34,500 for remortgaging, while net mortgage lending fell to £4.3bn from £7.7bn the month before. Read plainly: fewer purchases, more remortgages. The wave of fixes taken out in cheaper years is running out, and people are rebuilding their deals.

What should you do with savings while rates are high?

Check what yours are earning. The effective rate on new household time deposits was 4.21% in July; the average on instant-access balances was 1.65%. That 2.5 percentage point gap is £250 a year on every £10,000, and closing it carries no risk — it only takes opening an account.

Mind the tax. The personal savings allowance is £1,000 of interest a year for basic-rate taxpayers, £500 for higher-rate and nil for additional-rate. At around 4%, a basic-rate taxpayer uses up that allowance at roughly £25,000 of savings; beyond that a cash ISA, where interest is not taxed at all, usually wins.

Where can you get free help?

For debt and mortgage difficulty, Citizens Advice is free and nationwide, including by phone. For calculations and plain explanations of products, MoneyHelper is the government-backed money guidance service. A mortgage broker is also worth considering: many are paid by the lender rather than by you and can see deals that are not on public comparison sites. Nobody should ever pay up front for a "free mortgage consultation".

What should you do in the next few weeks?

One: find the end date of your fix. Two: if it is under six months away, reserve a rate now — you can walk away later. Three: recalculate your LTV using today's property value, not the purchase price. Four: compare your lender's product transfer against two or three market deals on total cost, not on rate. Five: move idle cash out of the current account.

Every upcoming deadline, bank holiday and rate decision date is in the ONLYWAY calendar, day by day with explanations.

Read also: Bank of England rate decision on 17 September · UK credit history, cards and transfers