The effect on your household budget depends on the size of your loan, your deposit, the remaining term, your deal and the fees attached.

That’s the bit mortgage headlines often leave out.

The latest snapshot available for this article, dated 7 August 2026, put Bank Rate at 3.75%.

It reported average residential rates of 5.63% for two-year fixed mortgages, 5.67% for five-year fixes, 4.52% for two-year variable deals and 7.13% for the average standard variable rate (SVR).

Those are market averages, not personal offers.

Lenders price mortgages differently according to your loan-to-value, income, credit history, property and fees.

What could that mean each month?

Here’s an illustration using a £300,000 repayment mortgage over 25 years.

It excludes fees and assumes the rate stayed unchanged for the whole calculation period.

At 5.63%, the payment would be about £1,864 a month. At 5.67%, it would be about £1,874. At 4.52%, it would be about £1,670.

At 7.13%, it would be about £2,143.

So the gap between 4.52% and 7.13% is roughly £473 a month more than £5,600 a year.

That isn’t a quote from a lender, and your figures could be very different.

But it shows why the percentage point in a headline needs translating into pounds before you make a decision.

Cambridge prices add another layer.

The provisional May 2026 average house price was £467,000, while the average first-time-buyer price was £391,000 and the average price for mortgage-funded purchases was £463,000, according to the Office for National Statistics and HM Land Registry.

Those figures show the size of the budgets many local buyers are dealing with.

They do not set your mortgage rate.

A larger deposit can reduce the loan-to-value and may open up different products, but affordability still depends on your full circumstances.

Should you wait, fix or remortgage?

Waiting could pay off if rates fall. It could also leave you paying a higher variable rate, facing a different affordability assessment or losing the chance to buy a property that works for you.

Fixing gives you a clearer monthly payment for the agreed period. The trade-off is that you may pay more than necessary if rates later drop, and leaving early can trigger an early-repayment charge.

Remortgaging can be sensible when your fixed or discounted deal is nearing its end, but compare the total cost. A lower headline rate can be cancelled out by arrangement fees, legal costs or an early-repayment charge.

MoneyHelper and the Financial Conduct Authority both advise borrowers to check the costs and timing before switching.

Mortgage offers commonly last six months, but individual lender rules change.

The useful next step is to write down your balance, current payment, deal end date, early-repayment charge and likely fees.

Then compare the total cost over the period you expect to keep the mortgage not just the rate printed in the advert.

If you’re unsure, ask an independent mortgage expert to explain what you should check before choosing a rate.

And if you’re buying in Cambridge or elsewhere in Cambridgeshire, tell us which budget or deal decision you’d like examined in a follow-up.