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Bad-Credit Mortgage Calculator — See the Cost of a Higher Rate

A weaker credit history can lead to a higher interest rate being offered. This tool shows what that difference could mean for the monthly payment and the total repaid.

Local context: Credit reporting, consumer rights, record-retention periods, score displays, lending decisions, products, taxes, and consumer protections vary by country and provider. This content is general information, not legal, financial, tax, debt, credit, insurance, investment, or personalised advice. Check the process and terms that apply where you live.

Compare two interest rates on the same loan

Illustrative scenario only: not financial advice, a lender decision, an offer, a quote, a credit-score forecast, or a guarantee of savings, repayment, approval, eligibility, tax treatment, or any financial outcome.

Why the rate matters more than it looks

A one or two percentage point difference in the interest rate sounds small, but it is applied to a large balance over many years. The comparison here keeps the loan amount and term fixed and changes only the rate, so the entire difference in payment and total interest comes from pricing rather than borrowing more.

Rates offered to people with past credit difficulties vary widely between providers and change with market conditions. The two rates here are examples you type in, not rates available from any particular lender. Enter the rates you have actually been shown, if you have them, to make the comparison personal.

The long-term view

The extra amount over the full term is often the number that surprises people, because it compounds the monthly difference across every payment. Some borrowers accept a higher rate for a fixed period to access the market, then plan to remortgage once their record improves. That strategy only pays off if the improvement outweighs the extra interest paid meanwhile.

If a higher-rate mortgage is used as a stepping stone, it is worth knowing what would need to change for a better rate later. Credit reports can be checked and corrected, missed payments age, and defaults and late payments carry less weight over time. The calculator can be re-run with a lower second rate to see what a future remortgage could save.

Things to weigh alongside the rate

Higher-rate products sometimes carry arrangement fees, different early-repayment rules, or shorter initial terms that matter as much as the headline rate. Fees can be paid upfront or added to the loan, and adding them means paying interest on them too.

Borrowing against a home is a long commitment, and falling behind on a mortgage usually has more serious consequences than falling behind on other credit. Anyone unsure whether the numbers work should consider speaking with a qualified mortgage professional who can look at the whole situation.

A practical next step

See how a mortgage payment is calculated, or read how to approach a mortgage with bad credit.