Buying your first home feels easier when you have a realistic budget in mind.
Your income is important, but it is only one part of mortgage affordability. Lenders will also look at your deposit, spending, debts, credit history and mortgage term.
This guide explains the basics, so you can see what may affect your budget before you start viewing homes.
What to know about first-time buyer affordability
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Income gives you a starting point
Some lenders may use income multiples to estimate what you could borrow.
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Your deposit increases your buying budget
Your possible property price is usually your mortgage amount plus your deposit.
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Monthly payments matter too
The maximum you can borrow is not always the same as the amount that feels comfortable.
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An Agreement in Principle can help
An AIP can give you an early idea of what a lender may offer before you view seriously.
Unsure what you could afford?
How much could you afford?
As a rough guide, some lenders may consider lending around 4 to 4.5 times your income. This can help you estimate a possible mortgage amount.
For example:
Annual income
Rough mortgage guide at 4.5x income
Example deposit
Possible property budget
£30,000
£135,000
£20,000
£155,000
£40,000
£180,000
£25,000
£205,000
£50,000
£225,000
£30,000
£255,000
The table above is a simplified example. Lenders also check spending, debts, credit history, income type, mortgage term, interest rate and wider circumstances before making a decision.
Take the guesswork out of affordability. Check how much you could borrow with our affordability calculator →
A simple way to think about your budget
Your first-time buyer budget usually has two main parts:
Mortgage amount + deposit = possible property price
For example, if a lender may offer you a £180,000 mortgage and you have a £25,000 deposit, your possible property budget could be around £205,000.
That does not mean every property at that price will be suitable. You may also need money for legal fees, surveys, moving costs, insurance and any early repairs or furniture. However, this simple formula gives you a clear starting point.
What lenders look at
Lenders want to see whether the mortgage looks affordable alongside your normal life.
They usually look at:
- Your income
- Your deposit
- Your regular spending
- Any loans, credit cards or car finance
- Your credit history
- The mortgage term
- The property price and loan-to-value
This is why two buyers with the same income may get different results. One buyer may have a larger deposit and fewer commitments. Another may have more monthly outgoings or a less straightforward income.
Why monthly payments matter
The amount you can borrow is important, but the monthly payment matters just as much.
A higher interest rate can increase your monthly payment, even if the mortgage amount stays the same.
Mortgage amount
Term
Example rate
Approx monthly repayment
£200,000
25 years
5%
£1,169
£200,000
25 years
6%
£1,289
£200,000
25 years
7%
£1,413
The table above is a simplified example based on a repayment mortgage. Estimate your own figures with our repayment calculator →
This is why it helps to check both the mortgage amount and the monthly payment before choosing a price range.
As a rough starting point, look at your income, deposit and monthly commitments.
What could reduce what you can afford?
Some costs can lower the amount a lender may offer because they reduce your spare monthly income.
Common examples include:
- Car finance
- Personal loans
- Credit card balances
- Childcare costs
- High regular spending
- Recent missed payments
- A smaller deposit
- A shorter mortgage term
These do not always stop you getting a mortgage. They simply help shape which lenders, rates and mortgage amounts may be available.
How to improve your position
Small changes can sometimes make your budget clearer before you apply.
You could:
- Check your credit report for errors
- Reduce unused credit where sensible
- Pay down expensive debts where possible
- Save a larger deposit
- Compare different mortgage terms
- Avoid new borrowing before applying
- Get your documents ready early
A broker can also help you compare how different lenders may assess your income, deposit and monthly commitments.
Should you borrow the maximum?
The maximum a lender may offer is not always the right amount to spend.
It helps to think about the life you want after you move in. A comfortable budget should leave room for bills, savings, furniture, repairs, travel, social plans and future changes.
A good first home should feel exciting, not stretched from day one.
How to check your real first-time buyer budget
A simple next step is to check your numbers in this order:
- Estimate what you could borrow based on income.
- Add your deposit to see a possible property budget.
- Check the monthly repayment.
- Review your regular costs and debts.
- Speak to a broker before viewing seriously.
Want a clearer idea of what a lender may offer? Get an Agreement in Principle before you start viewing seriously →
How Muttuo Mortgages can help
Once you have a clearer idea of what you may be able to afford, the next step is finding a mortgage route that fits your budget, deposit and plans.
Muttuo Mortgages can help you:
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compare affordability across over 100 lenders
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understand how different lenders may assess your income, spending and deposit
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review your borrowing range alongside the monthly payment
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move from an Agreement in Principle to a full mortgage application
Whether you are just checking what feels realistic or getting ready to make an offer, advice can help you compare your options with more confidence.
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First-time buyer affordability FAQs
How much can I borrow as a first-time buyer?
A common rough guide is around 4 to 4.5 times your income, but this is only a starting point.
Your actual borrowing amount depends on your deposit, spending, debts, credit history, income type, mortgage term and the lender’s criteria.
Is my deposit included in affordability?
Your deposit is not part of the mortgage amount, but it does affect your overall property budget.
For example, if you can borrow £180,000 and have a £25,000 deposit, your possible property budget could be around £205,000.
Can I get a mortgage with a 5% deposit?
Some first-time buyers may be able to get a mortgage with a 5% deposit, depending on the property, lender and wider circumstances.
A larger deposit may give you more options, but a smaller deposit does not always mean buying is out of reach.
Does an affordability calculator confirm what I can borrow?
No. A calculator gives an estimate, not a mortgage offer.
It can help you understand your rough budget, but a lender or broker will need to review your income, deposit, spending and circumstances before giving a clearer answer.
When should I get an Agreement in Principle?
It can help to get an Agreement in Principle before you start viewing homes seriously.
An AIP can give you a clearer budget and show estate agents that you are ready to move forward.
