Remortgaging £400,000: Rates, Lenders and What You Need to Earn

Income Requirements for a £400,000 Remortgage

The standard affordability model used by most high-street lenders is 4x–4.5x gross annual income. On a £400,000 loan that translates to a required income of £89,000–£100,000. For joint applicants, combined income is used, so two earners on £50,000 each would typically satisfy a 4x lender. However, stress-testing at rates of 6.5%–7.5% can reduce the maximum loan further, even when the headline multiple appears sufficient.

Specialist and challenger lenders — including Kensington, Accord, and several building societies — will consider 5x income for applicants with strong credit histories, low existing debts and stable employment. At 5x, a £400,000 loan requires £80,000 gross income, making it accessible to a wider range of senior professionals. Some lenders participating in professional mortgage schemes will go to 5.5x for qualifying occupations, reducing the income threshold to approximately £73,000.

Self-employed borrowers need to present two or three years of accounts showing sufficient net profit or salary-plus-dividend income to support the loan. Some lenders will average the last two years; others use the lower of the two. A good mortgage broker will match your income structure to the right lender rather than letting you be declined on a technicality.

Joint borrower sole proprietor (JBSP) arrangements are also worth considering if the main applicant's income falls slightly short. A parent or family member can be added to the mortgage for income purposes without necessarily being on the title deeds, subject to lender policy.

Monthly Costs and Rate Tiers

At a rate of 4.3% on a 25-year repayment mortgage, a £400,000 loan costs approximately £2,177 per month. At 4.0% the payment falls to around £2,107, and at 4.8% it rises to £2,280. Over a two-year fixed term the difference between the best and worst rate available could exceed £2,400 in total interest paid — underscoring why rate comparisons matter at this loan size.

LTV plays a decisive role in the rate you are offered. Borrowers at 60% LTV typically access rates 0.2%–0.4% lower than those at 75% LTV, and 0.5%–0.8% lower than 85% LTV. On a £400,000 loan at 60% LTV, the minimum property value is £667,000 — very common in London and parts of the South East where this loan size is most frequently seen.

Arrangement fees deserve careful attention on large loans. A fee of £999 added to the loan at 4.3% costs roughly £1,600 in interest over 25 years. A fee-free product at 4.45% on £400,000 would cost an additional £32 per month, or £768 over a two-year fix — still less than the fee cost in many cases. A whole-of-market broker can run a true cost comparison across both options.

Lenders and Products for £400,000 Remortgages

The major high-street lenders — Barclays, HSBC, Halifax, NatWest and Santander — all lend at £400,000 to qualifying borrowers. Nationwide is also competitive at this level, often offering strong five-year fixed rates for existing members. First Direct, operated under the HSBC umbrella, is popular with high-income professionals due to its clean application process and competitive pricing.

For borrowers who need higher income multiples or have more complex income structures, lenders such as Kensington, Accord (the broker arm of Yorkshire Building Society), Metro Bank and Aldermore often offer greater flexibility. These lenders tend to take a more manual approach to underwriting, which can be an advantage for the self-employed, contractors or those with commission-heavy income.

Private banks including Coutts, Arbuthnot Latham and C. Hoare and Co. are worth exploring if you have significant investable assets alongside property, even if your headline income does not meet standard criteria. These institutions can offset assets against income in their affordability calculations, which is not available through mainstream channels.

Some lenders impose maximum loan size caps or apply tighter criteria above £350,000. Using a broker with whole-of-market access ensures you are not inadvertently directed only to lenders whose criteria you happen to fit, missing out on better-priced options elsewhere.

Tips for Securing the Best £400,000 Remortgage Deal

Start the process three to six months before your current deal expires. Most lenders allow you to secure a rate four to six months in advance with no obligation to proceed, protecting you if rates rise in the interim. This window also gives time to address any minor credit issues — settling outstanding balances, removing errors from your credit file — before a formal application is submitted.

Gather documentation early: three months of payslips, three months of bank statements, your last P60, and a copy of your current mortgage statement showing the outstanding balance. Self-employed applicants should have SA302 forms and tax year overviews ready for at least two years, ideally three.

Consider whether a two-year or five-year fix best suits your circumstances. In 2025 the rate premium for a five-year fix over a two-year fix is modest on many products, making the longer-term security attractive for borrowers who value payment certainty. If you anticipate moving or significant income changes within two years, a shorter fix preserves flexibility.

Finally, consider the total cost of switching — including your current lender's early repayment charge if applicable, legal and valuation fees on the new deal, and any product fees. On a £400,000 loan, a broker-led whole-of-market search regularly identifies net savings of £3,000–£8,000 over a fixed term compared with rolling onto a standard variable rate.