Monthly cost of a £300,000 mortgage in the UK (2026): the full payment matrix

A £300,000 mortgage sits at the upper end of the median English market and the lower end of London's. In 2025 there were 119,061 residential transactions between £270,000 and £330,000 across England and Wales — roughly 14% of the 848,775 sales HM Land Registry recorded that year. At the Bank of England's most recent quoted rate for a 75% LTV 5-year fix (4.32%, April 2026), a £300,000 repayment mortgage costs approximately £1,637 per month over 25 years.

Below: payments by term, payments by rate, total interest paid, and how a 1-3 percentage point rate shock changes the monthly bill.

Where £300,000 buys a typical home in 2026

£300,000 is the median price point for Bristol, Manchester's better postcodes, parts of York and Norwich, and outer London zones 4-6. The top 15 towns and cities by 2025 transaction volume in the £290k-£310k band:

(Source: HM Land Registry pp-complete, full year 2025, fetched 2026-05-11. Town field as recorded by HMLR.)

Across England and Wales 41,928 transactions completed between £290,000 and £310,000 at an average of £299,601 — a near-perfect match to the £300,000 reference point. A further pattern worth noting: 9,389 sales completed at exactly £300,000 in 2025, against 2,005 in the £300,001-£304,999 band — a 4.7× cliff at the post-April 2025 first-time buyer nil-rate threshold. Vendors and buyers price to the round number, not above it.

The payment matrix at current rates

A repayment mortgage payment is fixed by three numbers: the loan amount, the interest rate, and the term in years. The standard amortisation formula gives, for £300,000:

The top row uses the latest published Bank of England representative quoted rate for 75% loan-to-value 5-year fixed mortgages (4.32% on 2026-04-01). Actual rates a borrower will be offered vary by lender, deposit, credit profile, property type and product features. The remaining rows are illustrative — products at higher rates remain on the market for higher-LTV cases, specialist lenders and buyers who fail mainstream affordability checks.

Total cost over the term

Stretching the term reduces the monthly payment but increases total interest paid:

A 35-year term saves £250/month versus a 25-year term but costs an additional £91,237 in interest over the life of the loan. The cheaper monthly is a trade against total cost. The interest gap on a £300,000 loan is roughly £4,500 per extra year of term.

Recent rate trend

The BoE 75% LTV 5-year fix quoted rate has trended down through the 2025-2026 cycle:

(Source: Bank of England series 75LTV5Y, monthly, fetched 2026-05-11.)

We do not forecast where rates go next. We can show what happens if they move.

Rate shock at the next remortgage

Borrowers fixing today need to plan for what the payment looks like if rates are higher when the fix ends:

A 2-percentage-point rate rise on a £300,000 mortgage adds £355/month — £4,260/year — to the household budget at remortgage. Lenders' affordability assessments under FCA MCOB rules already stress-test for this; borrowers should plan for it independently.

Stamp duty on a £300,000 purchase

Under post-1 April 2025 SDLT thresholds in England and Northern Ireland, £300,000 sits exactly on the first-time buyer nil-rate ceiling:

• First-time buyer: £0 (£300,000 is the post-April-2025 FTB nil-rate threshold; relief tapers between £300,001 and £500,000)
• Standard buyer (main residence, not first-time): £5,000 (2% on £125,001-£250,000 = £2,500; 5% on £250,001-£300,000 = £2,500)
• Additional property (second home / buy-to-let, 5% surcharge applies): £20,000

The £0 versus £5,000 first-time-buyer swing at exactly £300,000 is one reason the data shows such pronounced bunching at the round number — a single pound above changes the FTB SDLT bill from £0 to £50 (5% of £1) and removes future FTB-relief eligibility. The mechanics of the relief and the 300k-500k taper are walked through in the first-time buyer SDLT relief explainer. HMRC's SDLT calculator and a conveyancer confirm individual eligibility on completion.

The all-in monthly cost

The £1,637 figure is the mortgage payment alone. The all-in monthly cost of owning a £300,000 home includes several other line items:

• Council tax (varies by local authority): Bristol Band D 2026-27 = £2,713.68 (~£226/month). The 2026-27 average across 296 English billing authorities is approximately £2,411 — about £201/month.
• Energy (varies by property, EPC rating and tariff): a typical D-rated 3-bed semi runs roughly £120-£190/month at the current Ofgem default tariff cap.
• Buildings and contents insurance: typically £25-£45/month for a mid-priced family home.
• Maintenance reserve: 0.5-1.5% of property value annually, or £125-£375/month on a £300,000 home (in line with RICS planned-maintenance guidance).

A £300,000 home in Bristol therefore typically costs £2,150-£2,500/month all-in to own, before any service charge on a leasehold flat or ground rent. For the full breakdown including deposit, conveyancing, survey and first-year ownership costs, see our full true-cost worked example for a £300,000 home.

How does this compare to a smaller or larger loan?

The mortgage payment scales close to linearly with the loan amount at any given rate. A £200,000 mortgage at 4.32% over 25 years is £1,091/month — see our £200,000 mortgage payment matrix for the threshold-pair view. Stepping up to £500,000 at the same rate and term is £2,728/month — see the £500,000 home worked example for the larger SDLT slab impact. The income headroom required scales the same way: roughly £22k more in gross household income for every additional £100,000 of borrowing at a 4.5× loan-to-income multiple.

How much income do you need?

UK lenders typically apply a 4.5× loan-to-income (LTI) multiplier on residential affordability assessments, with rate stress-tests at +1 to +3 percentage points. To borrow £300,000 conventionally, a single applicant needs roughly £66,700 gross household income at a 4.5× multiple, or £54,500 at the higher 5.5× multiple some lenders apply for professionals or high earners. Joint applications pool income, so two applicants on £33-35k each would also clear a 4.5× test for £300,000.

This is illustrative; an applicant's actual maximum borrowing depends on credit history, dependants, existing debt, deposit size and the specific lender's policy. Speak to a qualified mortgage broker before acting.

See your own number

Type any UK postcode into Homecost's tool to see the all-in monthly cost — mortgage at the current BoE quoted rate, council tax from gov.uk 2026-27 statistics, energy estimates from EPC data, and stamp duty calculated for your buyer status — for every home on that street. Try a Bristol BS15 postcode (BS15 1NE), or browse all our cost-intelligence guides.

Sources and dates

Mortgage rates: Bank of England series 75LTV5Y, monthly, latest 2026-04-01 (4.32%). Transaction counts: HM Land Registry pp-complete, full year 2025, fetched 2026-05-11 (848,775 total sales England & Wales). Council tax: gov.uk England council tax statistics 2026-27 (296 billing authorities, Bristol Band D £2,713.68). Stamp duty bands: HMRC, post-1 April 2025 SDLT rules for England and Northern Ireland. Energy averages: EPC Open Data (29.21M certificates).

This is general information, not advice. Mortgage rates available to a specific applicant depend on lender, deposit, credit profile, property type and product features. Speak to a qualified mortgage broker or financial adviser before acting.