Two Applicants
Joint Mortgage
Calculator
Typical Multiplier
4.5x
Avg UK Rate
4.62%
Enter both salaries to see how much you can borrow together on a joint mortgage. The calculator shows your combined affordability, monthly repayments and how much more buying power you get compared to applying alone.
Both Applicants
Your Property Budget
£322,500
Combined Income
£65,000
Max Borrowing
£292,500
LTV
90.7%
Affordability
-
Monthly Payment
£0
Total Interest
£0
Total Repayable
£0
Joint vs Solo Buying Power
Applicant 1 alone
£0
Applicant 2 alone
£0
£0 more buying power
How the joint mortgage calculator works
Enter both applicants' annual salaries, your combined deposit, and the interest rate. The calculator multiplies your combined income by the lending multiple (typically 4.5x) to estimate the maximum you can borrow. Add your deposit and that's your total property budget.
It then calculates the monthly repayment, total interest and a year-by-year amortisation schedule. The joint vs solo comparison shows exactly how much extra buying power you gain by applying together rather than individually. For most couples, a joint application unlocks 40-80% more than either person could borrow alone.
The affordability check shows what percentage of your combined income goes toward mortgage payments. Most lenders want this below 35-40%. If it's higher, you may need a larger deposit or longer term. Use our mortgage affordability calculator for a more detailed assessment, or our mortgage calculator for a full single-applicant breakdown.
Frequently asked questions
How much can we borrow on a joint mortgage?
Most UK lenders offer 4 to 4.5 times your combined annual income. If Applicant 1 earns £35,000 and Applicant 2 earns £30,000, your combined income is £65,000 and you could borrow around £292,500. Add your deposit for your total property budget.
Do both applicants need to be on the mortgage?
No — you can apply solo if one income is sufficient. However, a joint mortgage combines both incomes, typically letting you borrow 40-80% more. Both applicants are jointly liable for the full mortgage.
Can unmarried couples get a joint mortgage?
Yes. UK lenders assess joint applications on combined income and creditworthiness, not marital status. Unmarried couples, friends and family can all apply jointly. Get a declaration of trust from a solicitor to clarify ownership shares.