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Mortgages · 9 minute read

Choose the mortgage, not just the headline rate.

Start with deals you can actually obtain, then compare the full cost and the restrictions that matter to your plans.

Key points

What to know before you act

  • Compare deals over the same period and include every product and advice fee.
  • Choose rate certainty or flexibility according to the payment movement you could absorb.
  • Check early repayment charges, overpayment rules and the reversion rate before applying.

On this page

Test your assumptions Compare mortgage payments Change the price, deposit, rate and term

The short answer

The right mortgage is an affordable, suitable product for which you are eligible. Compare the payment and total cost over the period you expect to keep the deal, including product, valuation, legal and broker fees; then examine the rate type, initial-deal end date, reversion rate, early repayment charges, overpayment rules, portability and mortgage term.

Compare like with like

A low rate with a large fee can cost more than a fee-free deal, particularly on a smaller mortgage. APRC is useful for a whole-term illustration but may assume you remain on a costly reversion rate for years. Also calculate the cost over your likely fixed or introductory period. Our mortgage calculator compares payments and total interest; the break-even calculator includes switching costs.

Fixed, tracker or other variable rate?

  • Fixed: payment certainty during the deal, usually with early repayment charges.
  • Tracker: normally moves with a stated reference rate plus a margin; payments can rise or fall.
  • Discount or lender variable: linked to a lender-controlled rate, so understand what can change and why.

Do not choose solely on a forecast of future rates. Decide how much payment movement your household could absorb and how valuable certainty is to you. Our mortgage-rate history shows how representative fixed rates and Bank Rate have moved without pretending that history predicts the next change.

Term and repayment method

A longer term generally lowers the required monthly repayment but increases interest if all else is equal. A repayment mortgage reduces capital over time. Interest-only requires a credible repayment strategy and lender acceptance; a hoped-for increase in property value is not a repayment plan.

Flexibility can be worth money

Check annual overpayment allowances, early repayment charge dates, whether the mortgage can move to another property, and what happens if you need to borrow more. “Portable” does not mean an automatic transfer: affordability and property checks still apply.

Direct lender or mortgage adviser?

A lender adviser discusses that lender’s range. A broker may consider a wider range but not necessarily every product, including some direct-only deals. The FCA says advisers must explain their charges and any limits on the mortgages they can recommend. Check the firm or individual on the FCA Register.

A practical comparison checklist

  1. Confirm borrowing need, deposit, LTV and monthly ceiling.
  2. Shortlist only products matching your circumstances and property.
  3. Compare all costs over the same period.
  4. Stress the payment at a higher rate.
  5. Read overpayment, exit, portability and reversion terms.
  6. Confirm whether advice is restricted and how the adviser is paid.
  7. Recheck the product before application and before completion if your adviser offers this.

Sources and limitations

Read the FCA’s mortgage affordability and advice guide and impartial MoneyHelper homebuying guidance. This page does not recommend a product or predict rates. Send corrections to hello@propertiesandhomes.co.uk.

Reviewed by the Properties & Homes editorial team
Published and last reviewed: 14 August 2026.
Change log: first edition.