First Time Buyer Mortgage Affordability

Higher income multiples for first time buyers

As a first time buyer, you may have access to higher income multiples than you expect. While the standard range across UK lenders is 4x to 4.75x income, several lenders now offer enhanced multiples specifically for first time buyers.

Some lenders offer up to 5.5x income for first time buyers earning above a certain threshold, typically around £35,000 per year. This is a significant boost. On a salary of £40,000, the difference between a 4.5x and a 5.5x multiple is £40,000 of additional borrowing capacity, which could be the difference between affording the property you want and falling short.

These enhanced multiples are often restricted to certain deposit levels or property values, and not every lender advertises them prominently. This is one of the key reasons why checking across multiple lenders matters so much for first time buyers. The lender your bank suggests may not be the one that offers you the most.

Lenders offer these higher multiples to first time buyers for a practical reason: first time buyers typically have fewer existing financial commitments such as existing mortgages, and they are generally younger with longer remaining career trajectories. From a risk perspective, lenders are comfortable stretching further.

How your deposit size affects affordability

Your deposit does more than just reduce the amount you need to borrow. It directly influences which lenders are available to you and what terms they offer. The loan-to-value (LTV) ratio, which is the percentage of the property value you are borrowing, is a key factor in every lender's affordability calculation.

With a 10% deposit (90% LTV): Most high-street lenders are available. You will typically be offered standard income multiples of around 4 to 4.5x. Interest rates at 90% LTV are slightly higher than lower LTV tiers, which means the stress test calculation reduces your maximum borrowing slightly.

With a 15% deposit (85% LTV): You unlock better interest rate tiers, which improves your stress test result and can increase your maximum borrowing. Some lenders also start offering enhanced income multiples at this level.

With a 25% deposit (75% LTV): You gain access to the most competitive rates and the widest range of lender products. Several lenders offer their highest income multiples at 75% LTV or below. The combination of a lower rate and higher multiple can significantly increase the amount available to you.

For first time buyers saving towards a deposit, every extra percentage point of deposit can make a meaningful difference. If you are close to a threshold like 85% or 75% LTV, it can be worth saving a little longer to cross it.

First time buyer stamp duty relief

First time buyers in England and Northern Ireland benefit from stamp duty relief that can save you thousands of pounds. As of April 2026, the current relief structure is:

• 0% stamp duty on the first £300,000 of the purchase price
• 5% stamp duty on the portion between £300,001 and £500,000

If the property price exceeds £500,000, the first time buyer relief does not apply and you pay the standard rates on the entire purchase price.

For example, buying a property at £350,000 as a first time buyer means paying just £2,500 in stamp duty (5% on the £50,000 above £300,000). A non-first time buyer would pay £2,500 on the same property under the standard rates. On a £425,000 property, the first time buyer saves even more relative to the standard rates.

This saving can be redirected towards your deposit or kept in reserve, both of which strengthen your overall affordability position.

Shared ownership for lower incomes

If your income makes a full purchase seem out of reach, shared ownership is worth considering. Under shared ownership, you buy a share of the property (typically between 25% and 75%) and pay rent on the remainder to a housing association.

Because you are only taking a mortgage on your share, the amount you need to borrow is significantly lower. On a £300,000 property, buying a 50% share means your mortgage is on £150,000, making it accessible on a much lower income.

There are important trade-offs to understand. You will pay rent on the share you do not own, which reduces the monthly saving compared to buying outright. Selling a shared ownership property can be more complex. And not all lenders offer shared ownership mortgages, so your choice of lender is more limited.

That said, shared ownership remains a practical route onto the property ladder for many first time buyers, particularly in areas where property prices are high relative to local incomes.

Help to Buy legacy implications

The Help to Buy equity loan scheme closed to new applications in 2023, but its effects are still relevant for many buyers in 2026. If you purchased a property using Help to Buy, the equity loan (typically 20%, or 40% in London) must be repaid when you sell or remortgage.

The equity loan is linked to your property's value, not the original loan amount. If your property has increased in value, you owe more in cash terms than you originally borrowed. This can affect your ability to remortgage or move home, as the repayment reduces the equity available for your next deposit.

If you are currently in a Help to Buy property and looking to move, it is essential to calculate your true equity position after repaying the loan. Some buyers discover they have less equity available than expected, particularly if property values in their area have not grown significantly.

Lifetime ISA for deposit saving

The Lifetime ISA (LISA) remains one of the most effective tools for first time buyers saving for a deposit. You can save up to £4,000 per year and receive a 25% government bonus of up to £1,000 annually. Over several years of saving, this can add thousands to your deposit.

The LISA can be used towards a first property purchase of up to £450,000. You must be between 18 and 39 to open one, and the account must have been open for at least 12 months before you use it to buy a property.

If you withdraw money for any purpose other than buying your first home or retirement, you will pay a 25% withdrawal penalty, which actually results in a net loss on your original contribution. This means it is important to be reasonably confident you will use the funds for a property purchase.

For first time buyers still in the saving phase, maximising your LISA contributions each year is one of the simplest ways to increase your deposit. A larger deposit improves your LTV ratio, which as discussed above can unlock better rates and higher income multiples.

Check your personalised figure

Every first time buyer's situation is different. Your income, deposit size, existing commitments, and the type of income you receive all feed into the calculation. And because each lender assesses these factors differently, the amount you can borrow varies significantly depending on which lender you approach.

Mortgage Affordability checks your specific details against 60+ UK lenders simultaneously, connecting to each lender's actual affordability calculator. This means you see the real range of what is available to you, not just one generic estimate. The tool was built by a CeMAP-qualified mortgage professional who understands exactly how lender assessments work.

Last updated: April 2026