Remortgaging in 2026/27: When and How to Switch Your Mortgage

How to remortgage in 2026/27 - when to start (3 to 6 months before your deal ends), product transfer vs remortgage, the Mortgage Charter protections, Early Repayment Charges, costs, affordability, and why a broker helps.

2026/27 tax year

Personal Finance
UK-wide

Millions of UK fixed-rate mortgage deals expire every year. When yours ends, doing nothing means slipping onto your lender's Standard Variable Rate (SVR) - almost always the most expensive rate you can be on. Remortgaging is how you avoid that: securing a new deal, either with your current lender (a product transfer) or a new one (a full remortgage). This guide explains when to start, the product-transfer-versus-remortgage trade-off, the Mortgage Charter protections available in 2026/27, Early Repayment Charges, the likely costs, and why a broker helps.

When to start remortgaging

The practical window is 3 to 6 months before your current deal ends. Two facts drive that timing:

Mortgage offers are typically valid for 3 to 6 months. That means you can apply now, get an offer, and have the new deal start on the exact day your old one expires - so you never touch the SVR (per MoneyHelper).
The Mortgage Charter lets you lock in a new deal up to six months ahead of your current fixed-rate deal ending (per the GOV.UK Mortgage Charter).

Locking a rate early does not usually stop you switching again if rates fall before completion - many borrowers reserve a deal early as insurance, then re-check the market nearer the date. Starting early matters most if you are moving to a new lender, because their affordability check, valuation and legal work all take time. Leaving it to the last minute risks a gap on the SVR.

Product transfer vs remortgage

A product transfer keeps you with your current lender on a new rate. A remortgage moves you to a new lender. The trade-off is speed and certainty versus choice and price.

	Product transfer (stay)	Remortgage (switch lender)
Who	Your current lender	A new lender
Affordability re-check	Not normally, for the same amount and term	Yes - full affordability and credit check
Valuation	Usually none	Usually required (often free on the deal)
Legal work	None	Conveyancing (often free or cashback)
Speed	Fast, often days	Weeks
Rate choice	Only your lender's range	Whole of market
Borrow more / change term	Limited (extra borrowing may need a check)	Yes, subject to affordability

Rule of thumb: a product transfer wins on convenience and certainty (no re-underwriting), while a full remortgage wins when a better rate elsewhere - or a need to release equity or change the term - outweighs the extra work. Sources: MoneySavingExpert - product transfers and the Mortgage Charter.

The Mortgage Charter - your protections in 2026/27

The Mortgage Charter is a voluntary agreement first published in June/July 2023 and still current in 2026/27 (GOV.UK published a Mortgage Charter 2026 version). Its signatories represent around 90% of the UK mortgage market. If your lender has signed up, you can rely on the following - all confirmed on the GOV.UK Mortgage Charter:

Lock in a new deal up to six months ahead of your current fixed-rate deal ending.
Switch to a new deal at the end of your fixed rate without another affordability check, provided you are up to date with payments.
A one-off option to reduce your monthly payments: switch to interest-only for six months, or extend your mortgage term - with the right to revert within six months, and no new affordability check and no impact on your credit score (for borrowers up to date on payments).
No forced repossession within 12 months of a first missed payment, except in exceptional circumstances.

Check the current signatory list on GOV.UK - it is maintained over time and not every lender participates. The FCA also publishes Mortgage Charter uptake data.

Early Repayment Charges and costs

Early Repayment Charge (ERC). If you leave your deal before the tie-in period ends - most commonly while inside a fixed-rate period - your lender typically charges an ERC. It is usually a percentage of the outstanding balance and often tapers down over the years of the deal (higher early on, lower as the deal nears its end). Remortgaging before your current deal ends usually triggers this charge, so waiting until the deal is close to expiring is often the cheaper path - unless the saving from a new, lower rate clearly outweighs the ERC. Your exact ERC and its end date are on your mortgage offer or annual statement.

Other costs to weigh (categories, not fixed figures - they vary by deal):

Arrangement / product fee - charged by the new lender; can sometimes be added to the loan (which then accrues interest).
Valuation fee - often free on remortgage deals; not needed for a product transfer.
Legal / conveyancing fee - often free or covered by cashback on remortgage deals; none for a product transfer.
Broker fee - some brokers charge a fee, some are commission-only.
Exit / deeds-release fee - a small admin fee some lenders charge when you leave.

Compare the true cost - the new rate plus all fees over the deal period - not just the headline rate. A slightly higher rate with no fees can beat a market-leading rate with a large arrangement fee, especially on smaller balances. Our mortgage repayment calculator and affordability calculator help you model the monthly figures.

The process, and why a broker helps

A typical remortgage runs: check your current deal's end date and ERC; get a decision in principle; compare deals across the market; apply and pass the new lender's affordability check and valuation; instruct the (often free) conveyancing; and complete on or just after your current deal ends. A product transfer collapses most of that into a single call or online request with your existing lender.

A whole-of-market broker adds value in three ways: they see deals across many lenders (including some not on comparison sites), they package your affordability case to the lender most likely to accept it, and they handle the paperwork and timing so the new deal lands as your old one ends. This matters most for anyone with a non-standard income profile.

On affordability: in March 2025 the FCA reminded lenders of the flexibility in its interest-rate stress-test rules (MCOB 11.6.18R), noting that as rates fall an overly cautious stress test can restrict access to otherwise affordable mortgages. Several lenders eased their tests in response, widening borrowing options (see the FCA).

Special cases

Self-employed, contractors and directors. Expect to evidence income with tax calculations (SA302s), tax-year overviews and accounts. Lenders differ widely on how they read this income, so a broker matters most here. See our self-employed and contractor mortgage guide.
Improved loan-to-value. If you have repaid capital or your home has risen in value, you may drop into a lower LTV band and unlock a better rate on remortgage.
Higher balances. On large loans, fee-heavy market-leading rates can beat fee-free deals - run the true-cost comparison over the full deal period.
Poorer credit. A product transfer with your current lender may be more accessible than switching, since it usually skips a fresh credit and affordability check; specialist lenders exist for adverse credit but price for the risk.
Payment worries. If you are struggling, the Mortgage Charter's one-off interest-only or term-extension options (reversible within six months) can cut payments without harming your credit file - speak to your lender before missing a payment.

Mortgage payment shock guide - what happens when a cheap fixed rate ends and payments jump.
Mortgage affordability calculator - estimate how much a lender may let you borrow.
Mortgage repayment calculator - model monthly payments at a new rate and term.
Self-employed and contractor mortgage guide - income evidence for non-standard applicants.

Frequently asked questions

When should you start remortgaging in the UK?

Most people start looking to remortgage about 3 to 6 months before their current fixed or introductory deal ends. Mortgage offers are typically valid for 3 to 6 months, so you can apply and lock in a new rate early, then have it take effect the day your existing deal expires - avoiding a spell on your lender's expensive Standard Variable Rate (SVR). Under the Mortgage Charter, borrowers approaching the end of a fixed-rate deal can lock in a new deal up to six months ahead. Starting early also gives time for an affordability check, valuation and legal work if you are switching to a new lender.

What is a product transfer and how is it different from a remortgage?

A product transfer means you take a new deal with your CURRENT lender - you stay put and simply move onto a new rate. A remortgage means you move to a NEW lender. The key trade-off: a product transfer is usually faster and simpler because the lender does not normally run a fresh affordability assessment or credit check if you are borrowing the same amount over the same term, and there is typically no valuation or legal work. A remortgage to a new lender opens up the whole market (often better rates), but the new lender runs its own affordability check, credit assessment, valuation and legal conveyancing. Under the Mortgage Charter, customers who are up to date with payments can switch to a new deal with their existing lender at the end of their fixed rate without another affordability check.

Is the Mortgage Charter still available in 2026?

Yes. The Mortgage Charter remains current - GOV.UK published a Mortgage Charter 2026 version with lenders reaffirming their commitments, and the signatories represent around 90% of the UK mortgage market. It gives borrowers the right to lock in a new deal up to six months ahead, switch deals at the end of a fixed rate without another affordability check (if up to date on payments), make a one-off switch to interest-only for six months or extend the term to cut payments (reversible within six months, with no new affordability check and no credit-file impact), and protection from repossession within 12 months of a first missed payment except in exceptional circumstances. Check the current signatory list on GOV.UK, as it is updated over time.

Do I need a solicitor to remortgage?

It depends. A product transfer - staying with your current lender on a new rate - normally needs no solicitor and no legal work at all. A remortgage to a NEW lender does involve legal conveyancing to transfer the charge on your property, but many remortgage deals include free legal work (or a cashback contribution towards it) as an incentive, so you may not pay for it directly. A dedicated remortgage conveyancing service is usually simpler and cheaper than a full purchase conveyance.

What is an Early Repayment Charge (ERC)?

An Early Repayment Charge is a fee your lender charges if you repay or leave your mortgage deal before the end of the tie-in period - most commonly while you are inside a fixed-rate period. ERCs are typically calculated as a percentage of the outstanding balance and often taper down over the years of the deal (for example a higher percentage in year one, falling each year). Remortgaging before your current deal ends usually triggers the ERC, so it is worth waiting until the deal is close to expiring unless the saving from a new rate clearly outweighs the charge. Always check your mortgage offer or annual statement for your exact ERC figures and the date it stops applying.

What does it cost to remortgage?

Costs vary by deal and lender, so treat these as categories rather than fixed figures. Typical costs are: an arrangement or product fee charged by the new lender (which can sometimes be added to the loan); a valuation fee, though many remortgage deals include a free valuation; legal or conveyancing fees, which are often free or covered by cashback on remortgage deals; a possible broker fee; and an Early Repayment Charge if you leave your current deal early. A product transfer with your existing lender usually has the fewest costs because there is no valuation or legal work. Always compare the true cost including any fees against the interest saving over the deal period.

Will I need to pass an affordability check to remortgage?

If you remortgage to a NEW lender, yes - they treat it like a new mortgage application and run a full affordability check, credit assessment and usually a valuation. If you do a product transfer with your CURRENT lender for the same amount over the same term, they normally will not run a fresh affordability check. In March 2025 the FCA reminded lenders of the flexibility in its interest-rate stress-test rules (MCOB 11.6.18R), noting that as rates fall an overly cautious stress test can restrict access to otherwise affordable mortgages - several lenders responded by easing their tests. If money is tight, a product transfer or a Mortgage Charter option may be more accessible than switching lender.

Can I remortgage if I am self-employed or have a smaller deposit?

Yes, though the paperwork differs. Self-employed borrowers, contractors and company directors usually need to evidence income with tax calculations (SA302s), tax-year overviews and business accounts, and lenders vary widely in how they treat this income - which is where a whole-of-market broker adds most value. If your loan-to-value has improved since you took out the mortgage (because you have repaid capital or your property has risen in value), you may qualify for a better rate band on remortgage. Borrowers with adverse credit have fewer options and may pay a higher rate, but specialist lenders exist. See our self-employed and contractor mortgage guide for the income-evidence detail.