When Should You Remortgage?

Most people remortgage for one clear reason: their current deal is ending. When your fixed or tracker rate finishes, you don’t just keep paying what you were — you’re moved onto your lender’s expensive standard variable rate. Avoiding that is the single most common trigger, and the reason timing is everything. But it isn’t the only reason to remortgage. The main triggers:

• Your deal is ending — switch to a new rate to avoid the SVR (the big one).
• Your home has risen in value — a lower loan-to-value can unlock materially cheaper rates.
• You want to release equity — for home improvements, to buy another property, or other needs.
• You want to overpay or change term — restructuring your mortgage term or building in flexibility.
• Rates have fallen — potentially worth switching even mid-deal, if the maths works.

When to Start the Remortgage Process

Here’s the part people most often get wrong — they start too late. The rule: begin 3–6 months before your current deal ends, with six months the sweet spot. That window exists because remortgaging isn’t instant:

The practical move the day you take out any mortgage: diary your deal end date, then set a reminder for six months before. That single habit is what keeps you off the SVR and in control — and it’s the answer to “when should I start the remortgage process?”

The SVR Trap — the Cost of Doing Nothing

If you do nothing when your deal ends, you don’t get penalised with a fee — you get penalised every single month instead. Your lender automatically moves you to their Standard Variable Rate, and the gap is brutal in 2026:

On a £200,000 mortgage, the difference between a ~5% fix and a ~7–8% SVR can be roughly £300–£500 a month — money simply handed to your lender for inaction. Over six months of drifting on the SVR, that’s often more than the entire cost of remortgaging. The SVR isn’t a “default resting place” — it’s the most expensive place your mortgage can sit, and it can change at the lender’s discretion at any time. Escaping (or never touching) it is the whole point of good timing.

Lock In Early — but Keep Your Options Open

One of the most useful and least-known facts about remortgaging: securing a rate early doesn’t commit you to it. When you lock in a deal up to six months ahead, you get a one-way safety net:

In other words, applying early is heads you win, tails you don’t lose — which is exactly why the “start six months early” advice is so strong. The specifics vary by lender (it’s always worth confirming the switch-down policy when you apply), and it’s one of the practical things a broker manages for you: locking a rate, then keeping it under review right up to completion.

Things to Consider Before You Remortgage

Timing aside, a handful of factors decide whether remortgaging is right and which deal to pick. Run through these first:

• Your ERC status — are you still within a fixed period? If so, leaving triggers an early repayment charge (typically 1–5% of the balance). Request a redemption statement from your lender for the exact figure.
• Your current LTV — if your home’s value has risen or you’ve paid down the balance, you may have dropped into a cheaper band. Lenders price best at 60% LTV, stepping up at 65/70/75/80/85/90%.
• Whether you want to borrow more — releasing equity changes which deals fit and the affordability check.
• Total cost, not headline rate — factor in arrangement fees (£0–£2,000), valuation and legal fees (often free on remortgage). A low rate with a big fee can cost more than a fee-free deal at a slightly higher rate.
• Product transfer vs full remortgage — see the warning below.

Should You Remortgage Mid-Deal?

Usually no — but sometimes yes. If you’re part-way through a fixed deal, leaving early almost always means paying an ERC, which often wipes out any saving. The way to know is a simple break-even calculation:

The exceptions where mid-deal remortgaging can still pay: rates have fallen dramatically since you fixed, your property’s value has jumped enough to unlock a much lower LTV band, or your circumstances have changed and you genuinely need to borrow more or restructure. In all these cases, do the full maths (ERC + fees vs saving) before acting — it’s exactly the calculation a broker runs for you.

When NOT to Remortgage

Sometimes staying put is the right call. Hold off if:

• You’re mid-deal with a large ERC that outweighs the saving (per the break-even test above).
• You’re in negative equity — you owe more than the home is worth, so remortgaging options are very limited.
• Your balance is very small — fees can outweigh the benefit; some lenders have minimum loan sizes.
• Your circumstances have worsened — a drop in income or new credit issues may mean a product transfer with your current lender (no affordability re-check) beats a full remortgage.

None of these are necessarily permanent — they’re reasons to time it differently, not to ignore it forever. Even here, it’s worth a conversation, because a whole-of-market broker can often find a route (or confirm that waiting is genuinely best) rather than leaving you guessing.

Frequently Asked Questions