Loan Affordability Calculator UK
Check whether a proposed monthly loan or credit payment is affordable based on your income, existing debts and typical lender limits.
Calculator
What this means
Lenders assess affordability by comparing your income to existing commitments and the new payment. Staying below 35–40% of gross income is a common guideline.
How to use this calculator
- Enter your income and regular outgoings.
- Add any existing debt repayments.
- See roughly how much you could afford to borrow or repay.
Worked example
You have £400 a month spare after essentials and existing commitments.
- Lenders look at disposable income after outgoings.
- That £400 sets a ceiling on a comfortable new repayment.
A new loan repayment should sit comfortably within your £400 monthly headroom.
Who this is for
- Anyone considering a loan or finance agreement.
- People checking borrowing fits their budget.
- Anyone wanting to avoid overcommitting.
How lenders assess loan affordability
Lenders compare your income with your regular outgoings and existing debts to judge what you can comfortably repay. A healthy gap between income and commitments improves your chances and the rate offered.
Borrowing close to your limit leaves little room for rate rises or emergencies. It's safer to keep new repayments well within your spare monthly income.
Frequently asked questions
35% is a conservative guideline. Some lenders use up to 40% for total debt commitments.
Similar concept but this tool is for general loan and credit payments rather than housing specifically.
No. Lenders also check credit history, employment and other factors.
Your income, regular outgoings, existing debts and credit history. They want to see you can repay comfortably even if circumstances change, not just on paper today.
A full application leaves a hard search that can briefly lower your score. Many lenders offer eligibility checks with a soft search that doesn't affect it.
Disclaimer
This calculator provides estimates for guidance only. It is not financial, legal or tax advice. Always check official sources or speak to a qualified professional before making decisions.
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