If you’re planning to buy your first home, one of the first questions is always: “How much can I actually borrow?”

It’s not just about your salary – lenders look at income, spending, and credit history before deciding what’s affordable. Here’s a clear, jargon-free guide to how mortgage affordability works in 2025, with some real examples based on property prices in Northern Ireland.

 

What Affects How Much You Can Borrow?

Lenders use affordability checks to make sure you can comfortably keep up with repayments. They’ll look at:

  • Your income – salary, bonuses, self-employed earnings, dividends.
  • Your outgoings – loans, credit cards, childcare, car finance.
  • Your credit history – reliability with past borrowing.
  • Your deposit size – the bigger your deposit, the more options you’ll have.

? Tip: Even small monthly commitments like subscriptions can be factored in, so tidying up your spending can help.

How Do Lenders Calculate Affordability?

You’ll often hear the “4–5x salary” rule. That’s a rough guide, but lenders dig deeper:

  • Most will lend around 4–4.5 times annual income.
  • With a strong profile (steady income, bigger deposit, good credit), this can stretch to 5–6 times income.
  • They’ll also run a stress test – checking if you could still afford repayments if rates go up.

Examples of Borrowing Scenarios

Here’s how affordability might look in practice:

  • Single applicant, £28,000 salary, 10% deposit
    Likely borrowing: £110,000–£125,000.
    ? Example: enough for a 2-bed terrace in Belfast (typically £125k–£140k with deposit).
  • Couple, combined £55,000 salary, 10% deposit
    Likely borrowing: £220,000–£250,000.
    ? Example: could buy a 3-bed semi in Lisburn or Bangor (~£230k–£260k).
  • Self-employed applicant, £40,000 average over 2 years, 15% deposit
    Likely borrowing: £160,000–£190,000.
    ? Example: suitable for a detached property in Newtownabbey (~£180k–£200k).

(Figures are illustrative – the actual amount depends on the lender and your situation.)

Tools & Calculators

Online calculators give you a rough idea, but they miss the detail. At Crane Financial, we’ll crunch the real numbers, compare across 90+ lenders, and show you exactly what’s possible.

? Check your affordability with us – free, fast, and no impact on your credit score.

How to Improve Affordability

If the numbers don’t quite line up, here’s how to boost them:

  • Clear existing debts – even reducing a credit card can make a difference.
  • Save a bigger deposit – more deposit = better deals.
  • Show stable income – lenders prefer steady pay, especially if you’re self-employed.
  • Check your credit file – use Experian, Equifax, TransUnion, or Checkmyfile to see all three.

FAQs

Q: Can I borrow 6x my income?
 In some cases, yes – but only with certain lenders and a strong profile.

Q: Do lenders include overtime and bonuses?
 Some do, some don’t. We’ll match you with lenders who count more of your income so you have better affordability.

Q: Do student loans matter?
 Yes – repayments are treated like any other monthly commitment.

Ready to See What You Could Borrow?

Don’t leave it to guesswork or generic calculators. We’ll work out exactly what’s affordable for you and match you with the lenders most likely to say yes.

? Book your free consultation today and take the first step towards your new home.