Give Yourself Six Months, Not Six Weeks

The single most useful thing you can do for your mortgage is to start looking at it roughly six months before your current deal ends. That sounds early, but it isn't. Lenders typically let you lock in a new rate three to six months ahead of completion, so you can secure a product now and switch straight over when your existing fix expires.

Leave it too late and you risk rolling onto your lender's standard variable rate, which is usually somewhere between two and three percentage points higher than the fix you came off. On a £180,000 balance with 20 years left, moving from 4.5% to 8% would push your payment from around £1,139 a month to roughly £1,506 — more than £360 extra, every month, for no benefit at all.

So set a reminder in your calendar, dig out your latest mortgage statement, and note the exact date your deal ends. You'll also want the early repayment charge period to have finished, otherwise switching could cost you thousands.

What Actually Moves Your Monthly Payment

A remortgage isn't just about chasing a lower headline rate. Four things decide what you pay each month, and they work together:

• The interest rate. Even a small difference matters. On a £180,000 loan over 25 years, dropping from 5.5% to 4.5% takes your payment from about £1,105 to roughly £1,001 — around £1,250 a year back in your pocket.
• The term. Stretching the remaining term brings the monthly cost down but means paying more interest overall. It's a legitimate short-term fix when money is tight, but go in with your eyes open.
• Your loan-to-value. If your property has risen in value, or you've been overpaying, you may have slipped into a better bracket. Rates are priced in bands — 90%, 85%, 80%, 75%, 60% — and crossing into the next one down can genuinely cut your rate.
• The fees. A cheap rate with a hefty fee isn't always cheaper. More on that below.

Compare Fees, Not Just Rates

This is where a lot of people quietly lose money. Two deals can look almost identical on the comparison table and be hundreds of pounds apart once you add everything up:

• Product fee. Commonly £999 to £1,499, sometimes more. It can usually be added to the loan, but that means paying interest on it for years.
• Valuation fee. Often free on remortgages, sometimes £100 to £300.
• Legal fees. Many lenders cover these on a remortgage, but not all. Check before assuming.
• Exit fee from your current lender. Usually £0 to £300, and it's easy to overlook.
• Broker fee. Anything from nothing to around £600, depending on the firm and the complexity of your case.

The honest way to judge a deal is to add the fee to the balance, work out the total cost over the fixed period, and compare that figure. A rate that's 0.1% lower but comes with a £1,500 fee can easily be the more expensive choice.

How a Broker Can Save You Money

You can absolutely remortgage on your own, and if your circumstances are straightforward it's perfectly doable. But a broker earns their keep in a few specific ways.

First, they see deals that aren't always on the high street, including products from lenders who only work through intermediaries. Second, they can check whether your current lender will offer you a better rate to stay — a "product transfer" often skips valuation and legal work entirely and can be arranged in days. That's a genuine option people forget to ask about.

Third, and most importantly, they can flag problems before they become refusals. A blip on your credit file, a recent change in income, self-employed accounts that look lumpy — these are exactly the situations where an experienced broker knows which lender will look at your case fairly rather than auto-declining it.

Ask upfront how they're paid. Some are fee-free and take commission from the lender; some charge a fee; some do both. Either way, it should be disclosed clearly before you commit.

If Your Circumstances Have Changed

Job moves, maternity leave, a period of self-employment, a divorce, a big drop in income — life happens, and lenders have rules about all of it. That doesn't automatically mean you're stuck.

Sometimes the sensible move is a product transfer with your existing lender, which involves far less paperwork and no affordability stress test in the same way a full remortgage does. Sometimes extending the term temporarily is the right call to free up cash flow while you get back on your feet. And sometimes the best answer is to do nothing at all and simply ride out the standard variable rate for a few months while you sort things out — expensive, but occasionally the least bad option.

What you shouldn't do is ignore it. Lenders are far more flexible with people who engage early than with those who wait until they've missed a payment.

Getting Your Documents in Order

Before you apply, gather the basics: three months of bank statements, three months of payslips, your last two P45s or P60s if you've changed jobs, and ID. If you're self-employed, you'll need two or three years of accounts or SA302s and tax year overviews.

Check your credit report with all three main agencies a few weeks beforehand and correct anything that's wrong — an old address or a settled account still showing as open is surprisingly common and surprisingly damaging. Avoid applying for new credit, changing jobs, or making big unexplained deposits in the months before you apply.

Then diary the whole thing again for your next deal. Remortgaging isn't a one-off job; it's a habit, and the people who review it every few years are quietly the ones who pay the least.