Key Takeaways

  • Save at least a 5% deposit: First-time buyers in the UK generally need a minimum of 5% of the purchase price saved as a deposit, though a larger deposit secures more competitive interest rates.
  • Get an Agreement in Principle (AIP): This is an official statement from a lender showing how much they might lend you, which helps when making offers on properties.
  • Understand the full costs: Buying a home involves upfront fees including valuation fees, conveyancing fees, and potentially Stamp Duty Land Tax (SDLT).

For many first-time buyers in the UK, navigating the mortgage market can feel like learning a completely new language. A mortgage is a long-term loan used to purchase a property, where the home itself acts as security for the debt. Securing your first mortgage is a significant financial milestone that requires careful preparation, from budgeting for your deposit to understanding how interest rates work.

This guide explains the fundamental concepts of getting a mortgage in the UK, helping you transition confidently from prospective buyer to homeowner.

The Role of the Deposit and Loan-to-Value (LTV)

Before you can apply for a mortgage, you must save a deposit. The deposit is the portion of the property’s purchase price that you pay upfront, while the mortgage covers the remaining balance.

In the UK, the minimum deposit is typically 5% of the property value, though most buyers aim for 10% or more to access better interest rates. Your deposit size directly determines your Loan-to-Value (LTV) ratio. The LTV is the size of your mortgage expressed as a percentage of the total property value. For example, if you buy a home worth £200,000 with a £20,000 deposit (10%), you will need a mortgage of £180,000, which represents an LTV of 90%.

Lenders view higher LTV mortgages (such as 95%) as higher risk. Consequently, they charge higher interest rates on these loans. As you save a larger deposit and your LTV decreases, you unlock more competitive mortgage rates, which can significantly reduce your monthly repayments. According to guidance from MoneyHelper, having a larger deposit also increases the likelihood of mortgage approval because it provides lenders with a larger safety margin (MoneyHelper, 2026).

The Mortgage Agreement in Principle (AIP)

One of the first practical steps in your buying journey is obtaining an Agreement in Principle (AIP), which is also known as a Decision in Principle (DIP). An AIP is a document from a lender indicating how much they are prepared to lend you in theory, based on a preliminary assessment of your income, expenses, and credit history.

Having an AIP is highly beneficial when viewing properties. It proves to estate agents and sellers that you are a serious buyer who is financially capable of making an offer. Obtaining an AIP usually involves a soft credit check, which does not affect your credit score, but you will still need to complete a full application once your offer on a house is accepted.

Choosing Your Mortgage Structure

When selecting a first-time buyer mortgage, you must make two key decisions: how you will repay the capital and how the interest will be calculated.

Read also: What Mortgage Interest Rates Are Available for First-Time Buyers in the UK

1. Repayment vs. Interest-Only

Almost all first-time buyers choose a capital repayment mortgage. With this structure, your monthly payments cover both the interest and a portion of the original loan balance. By the end of the mortgage term (typically 25 to 35 years), the entire debt is fully paid off, and you own the property outright.

In contrast, an interest-only mortgage requires you to pay only the interest charges each month. The original loan balance remains unchanged, and you must pay it off in full at the end of the term. Lenders rarely offer interest-only mortgages to first-time buyers unless they have a substantial deposit and a guaranteed repayment vehicle.

2. Fixed-Rate vs. Tracker Mortgages

You must also decide how your interest rate is structured:

  • Fixed-Rate Mortgages: Your interest rate remains the same for a set initial period, usually two, five, or ten years. This provides budget certainty, as your monthly repayments will not change, regardless of what happens to the wider economy.
  • Tracker Mortgages: Your interest rate fluctuates in line with an external benchmark, typically the Bank of England base rate. If the base rate falls, your monthly payments decrease, but if the base rate rises, your payments will increase.

At the end of your initial deal period, your mortgage will automatically revert to the lender’s Standard Variable Rate (SVR), which is typically much higher than the initial rate. To avoid this, most homeowners remortgage to a new deal before the reversion occurs.

Understanding Upfront Costs and Regulation

Beyond your deposit, buying a home involves several upfront expenses. These include:

  • Conveyancing Fees: Paid to a solicitor or licensed conveyancer who handles the legal transfer of property ownership.
  • Valuation and Survey Fees: Lenders require a basic valuation to ensure the property is worth the loan amount. Many buyers also pay for an independent homebuyer survey to check the physical condition of the property.
  • Stamp Duty Land Tax (SDLT): In England and Northern Ireland, stamp duty is a tax paid on property purchases. Fortunately, first-time buyers often qualify for relief or exemptions depending on the purchase price, as outlined by HM Revenue and Customs (HMRC, 2026). Devolved equivalents apply in Scotland (Land and Buildings Transaction Tax) and Wales (Land Transaction Tax).

The Financial Conduct Authority (FCA) regulates UK mortgages to ensure lenders treat customers fairly and assess affordability rigorously (FCA, 2026). Lenders will examine your bank statements, employment history, and outstanding debts to ensure you can comfortably afford your repayments now and if interest rates rise in the future.

Seeking Professional Guidance

Because the mortgage market is complex, many first-time buyers work with an FCA-authorised mortgage broker or adviser. An independent broker can assess your financial situation, access exclusive deals not available directly to the public, and guide you through the application paperwork.

Mortgage eligibility, limits, fees, and availability vary by lender, product, and your circumstances; and stamp duty and government schemes differ across England, Scotland, Wales, and Northern Ireland as of July 2026; rates change frequently, verify current terms with an FCA-authorised lender or adviser before deciding.

Financial Disclaimer

The information in this article is general educational information, not regulated mortgage advice, and not personalised financial, lending, or legal advice. Refisage is not authorised by the Financial Conduct Authority (FCA). You should consider speaking to an FCA-authorised mortgage adviser before making any decisions regarding home financing.

Your home may be repossessed if you do not keep up repayments on your mortgage.