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5 min readNumbers only. No advice.

GBP300,000 Mortgage at 5% for 25 Years: Payment Example

Worked repayment example for a GBP300,000 mortgage at 5% over 25 years, including monthly payment, total interest, and why the early schedule is interest-heavy.

Read the formula, then test the same idea with your own inputs.
Use the Mortgage Repayment Calculator

This extension page exists to support specific long-tail queries with formula-first explanations. It is intentionally narrow, deliberately opinion-free, and designed to lead into the relevant calculator rather than replace it.

Plain Figures does not recommend products, wrappers, or financial actions here. The goal is to make the arithmetic and the assumptions visible.

Core Formula

Standard amortisation example
M = P x [r(1 + r)^n] / [(1 + r)^n - 1]
  • P = GBP300,000 principal
  • r = 5% / 12 monthly rate
  • n = 25 x 12 monthly payments

Why this exact example works

Searchers typing a loan amount, rate, and term are usually not looking for a general home-buying article. They want a worked number they can compare with a quote or budget.

That makes exact-match example pages useful when they stay transparent about the formula and assumptions.

What the page should teach

The monthly repayment is only part of the result. The same example also reveals lifetime interest and why early payments are interest-heavy.

That is the educational advantage of an example page: it answers the query while also explaining the schedule behind it.

FAQ

Does this include mortgage fees?

No. It isolates the core repayment formula unless fees are added separately.

Will my lender quote match exactly?

Not always. Product fees, ancillary costs, and lender conventions can create differences.

Disclaimer

Illustration only. This is a formula example, not a mortgage quote, affordability decision, or lending recommendation.
Use This Calculator

Open the matching calculator to apply the guide to your own numbers.

Use the Mortgage Repayment CalculatorRun your own numbers with the linked calculator after reading the formula-first explanation.
Attribution and Review
Published by the Plain Figures editorial team. Review on this site focuses on formula accuracy, assumption clarity, and threshold freshness where current-year rules matter.
MethodologyAuthors and ReviewEditorial Policy
Related Guides

Keep moving through the same topical cluster with nearby explainers that support the calculator.

Read How Mortgage Repayment Calculations WorkRead Mortgage Rate vs Term: Which Changes the Cost More?Read Mortgage Overpayment: How Much Does It Save?
This guide is for general information only. Plain Figures does not provide financial advice. All figures are illustrative. Formulas and tax rules change, so verify current rates and consult a qualified adviser before making decisions.