Mortgage Arrears Calculator

Calculate mortgage arrears repayment options in the UK for 2025/26. Understand capitalisation, payment plans, and possession proceedings costs.

Mortgage Arrears Calculator

Mortgage Arrears Summary

Total Arrears-
Additional Interest on Arrears-
Monthly Payment + Arrears-
Possession Court Costs-
Total to Clear-
MB
Mustafa Bilgic Housing Debt Specialist — Updated April 2026
MortgageArrears2025/26

Mortgage Arrears Options Comparison

OptionImpactCost
Payment planPay arrears over 6–36 monthsInterest on arrears
CapitalisationAdd arrears to mortgage balanceExtended term
Term extensionExtend mortgage termMore total interest
Interest-only switchTemporary reduced paymentsCapital not reducing
Possession proceedingsLender seeks repossession£325 + £121 warrant

Key Mortgage Arrears Facts

Pre-Action Protocol
Required
Possession Fee
£325
Eviction Warrant
£121
SMI Loan
Available
Avg Repossession
12–18 mo
Credit Impact
6 years

How to Use This Calculator

1

Enter outstanding mortgage

Your current mortgage balance — check your latest statement.

2

Enter interest rate

Your current mortgage interest rate, found on your statement or online account.

3

Enter monthly payment

Your normal monthly mortgage payment amount.

4

Specify months missed

How many full monthly payments you have missed.

5

Choose repayment period

How long you want to spread the arrears repayment — 6 to 36 months.

Frequently Asked Questions

What happens when you fall behind on mortgage?
After 1 missed payment, your lender will contact you. After 2–3 missed payments, they begin formal arrears management under the FCA's Mortgage Conduct of Business rules. The lender must follow the Pre-Action Protocol before seeking possession — this means offering forbearance options like payment plans, capitalisation, or term extensions. Possession proceedings are a last resort.
Can the bank take my house for mortgage arrears?
Yes, but the process takes 12–18 months typically. The lender must follow the Pre-Action Protocol, obtain a court order (£325 fee), and then apply for an eviction warrant (£121). Courts will usually give you time to pay if you can demonstrate a repayment plan. The Administration of Justice Act 1970 allows courts to suspend possession if arrears can be cleared within a reasonable period.
What is Support for Mortgage Interest (SMI)?
SMI is a government loan (not a grant) that helps eligible benefit claimants pay mortgage interest. You must be receiving Universal Credit, Pension Credit, Income Support, or JSA(IB) for at least 39 consecutive weeks. The loan accrues interest at the current rate and is repaid when you sell the property. It covers interest only — not capital repayments.
Will mortgage arrears affect my credit score?
Yes, missed mortgage payments are reported to credit agencies and stay on your credit file for 6 years. Even one missed payment can significantly reduce your credit score by 50–100 points. If the lender obtains a possession order or you enter an arrangement, this is also recorded. Contact your lender before missing payments — they may offer a payment holiday that is not reported.
Can I sell my house to clear mortgage arrears?
Yes, and this is often better than repossession. You can sell privately (usually achieving a better price), use the proceeds to clear the mortgage and arrears, and avoid the credit damage of repossession. If the property is in negative equity, you may need lender consent for a 'short sale'. Your lender must give you reasonable time to sell before pursuing possession.

Official Sources & References

Data verified against official UK government sources. Last checked April 2026.