How to prepare for a mortgage application

Key takeaways

• Preparing key documents such as payslips, bank statements and proof of identity in advance can help avoid delays  
• Lenders assess your credit history, income, outgoings and existing financial commitments 
• Saving for a deposit can strengthen your application by reducing the amount you need to borrow, which may unlock better mortgage deals 
• Understanding how much you can borrow for a mortgage can help you plan your finances 

What lenders look for in a mortgage application

When applying for a mortgage in the UK, lenders want reassurance that you can afford your repayments now and in the future. To do this, they typically assess:

• Income and employment stability – including your salary, bonuses and how long you’ve been in your current role. Self-employed applicants are often assessed over a longer period and asked for additional financial records.
• Credit history – your track record of repayments and borrowing, including late or missed payments, defaults and other information recorded in your credit file.
• Existing debts – such as loans, credit cards and car finance agreements.
• Regular outgoings – household bills, subscriptions, childcare payments, commuting costs and other recurring expenses.
• Deposit size and source – how much you’re putting down upfront and where the funds have come from. A larger deposit can reduce risk for lenders and may give you access to a wider range of mortgage products.

Lenders also stress test your income to see whether you could still afford your mortgage repayments if interest rates were to rise or your financial circumstances changed in the future. A mortgage adviser can help you understand how different lenders assess affordability.

Knowing what mortgage lenders look for can give you a clearer picture of how mortgage decisions are made and help you prepare more effectively.

Mortgage application checklist

Explore our mortgage application checklist to understand the key steps in the process.

1. Check your credit score and financial history

Your credit history helps lenders understand how you've managed borrowing in the past.

You can check your credit report online through credit reference agencies such as TransUnion, Experian and Equifax. Reviewing your report can highlight areas that may need attention before you apply, including inaccuracies that could affect your credit score or lead lenders to assess your application based on incorrect information.

If you're planning to apply for a mortgage in the coming months, it's worth reviewing your credit report as early as possible. Changes to your credit score can take 3 to 6 months to appear in your report, so acting sooner gives you more time to make improvements before you apply. Some steps you can take include:

• Registering on the electoral roll. This helps lenders verify your identity and address.
• Paying bills and credit commitments on time. Consistently paying bills and credit commitments by their due date can show lenders that you’re financially responsible.
• Keeping credit card balances low where possible. Even if you make payments on time, regularly using a large proportion of your available credit can suggest a greater reliance on borrowing, which can make an application appear higher risk.
• Avoiding multiple credit applications in a short period. Each application can trigger a hard credit check and temporarily lower your score. It can also signal financial strain or irresponsible borrowing to lenders.

While a strong credit profile may indicate to lenders that you’re a reliable borrower, it’s just one of the factors they consider when assessing your application. Depending on your circumstances, you may still be able to get a mortgage with a history of credit problems.

2. Save for a deposit

Your deposit plays a key role in your mortgage application. Most lenders require at least a 5% deposit. However, some first time buyers may be eligible for a 100% mortgage, where no deposit is required. While this reduces the amount you need to save upfront, deposit size can still affect the mortgage deals available to you. Lenders often charge higher interest rates to borrowers with lower deposits, as they represent a higher lending risk. As a result, a smaller deposit usually means higher monthly repayments.

A larger deposit means you'll need to borrow less, which can improve your loan-to-value (LTV) ratio – the percentage of the property's value covered by your mortgage. For example, if a property costs £200,000 and you put down a £20,000 deposit, you'd need a £180,000 mortgage. This means you'd be borrowing 90% of the property's value, giving you a 90% LTV ratio.

A lower LTV can give you more mortgage options and lower interest rates, while a higher LTV may limit your choices and result in higher rates.

Setting up a savings plan and exploring government-backed or homebuilder schemes and offers can help you reach your deposit goal.

3. Organise your financial documents

Having the right paperwork to hand before you apply can help keep your mortgage application moving and reduce the chance of delays. Some of the essential documents lenders ask for include:

• Proof of identity (e.g., passport or driving licence)
• Proof of address
• Payslips and bank statements (usually the last 3 to 6 months)
• Tax returns, 2 to 3 years of business accounts and tax year overviews if you’re self-employed

Depending on where your deposit comes from, you may also need to provide evidence of its source. This could include savings account statements, inheritance documentation or confirmation of a gifted deposit from a family member.

4. Reduce existing debts and manage spending

Existing debts can affect how much you're able to borrow. Lenders look closely at your debt-to-income ratio, which you can improve by:

• Paying down credit cards or loans
• Avoiding taking on new credit
• Tracking your spending using a budget planner and reducing your outgoings where possible

Even small changes can help strengthen your application.

5. Understand how much you can borrow

Knowing how much you can borrow for a mortgage helps you set a realistic budget and narrow down your property search, giving you a clearer understanding of the homes and locations within your price range.

A mortgage calculator or budget planner can provide a useful starting point when working out how much you could afford to borrow. For more tailored guidance, a mortgage adviser can help you understand your options and explain how different lenders assess your application.

Additional ways to strengthen your mortgage application

Below are some additional steps you can take to improve your financial position in the lead up to your application:

• Maintain consistent employment where possible
• Avoid large or unusual payments through your bank account
• Keep financial records up to date
• Build a savings buffer for unexpected costs

Common mistakes to avoid when applying for a mortgage

As you prepare to apply, it's worth being aware of a few common mistakes that could affect your mortgage application. These include:

• Applying for multiple loans or credit cards shortly before your mortgage
• Missing debt repayments or exceeding credit limits
• Changing jobs just before applying – lenders want to see evidence of regular income
• Not checking your credit report in advance

Staying organised and informed can help you avoid unnecessary setbacks.