UK · GBP · Core mortgage tools

UK Amortization Schedule

Published by REO Technologies · Publisher contact: Abdul Raheem. Explanation and example arithmetic revised 2026-10-26; source-specific dates are stated separately. No licensed financial review is claimed.

Calculate every repayment and principal/interest totals, including permitted extra principal.

Enter current figures from your documents and quotes. Budget settings are editable. Inputs stay in this tab and are not saved or sent by the calculator.

Reference scope documented 2026-10-25. Residential tax bands are jurisdiction-specific. Rates, fees, budget buffers and lender ratios must come from current quotes or clearly labeled assumptions. Confirm legal buyer status and scheme conditions.

Your inputs

Current principal including financed fees (GBP)Enter your current figure; zero explicitly excludes an optional cost.

Actual / scenario annual nominal mortgage rate (%)Enter your current figure; zero explicitly excludes an optional cost.

Remaining repayment yearsMatch the contract or select a clearly labeled planning scenario.

Payment frequency

Permitted extra principal per payment (GBP)Enter your current figure; zero explicitly excludes an optional cost.

One-time permitted lump sum (GBP)Enter your current figure; zero explicitly excludes an optional cost.

Apply lump sum at payment periodMatch the contract or select a clearly labeled planning scenario.

Permitted lump sum at each year-end (GBP)Enter your current figure; zero explicitly excludes an optional cost.

Accelerated weekly / biweekly plan?

How this estimate works

Charge equivalent-period interest on opening balance, apply scheduled and permitted extra principal, then cap the final payment at balance plus interest. Annual lumps occur at each complete scheduled year.

Assumptions and limits

Amounts are GBP. Enter actual quotes, balances and costs. Planning settings are editable assumptions; no lender rate is fabricated.
Monthly nominal-rate amortization; fixed-rate projection across the entered remaining repayment period. Actual daily accrual, payment dates, product fees, rate resets and lender rounding can differ.
This is educational scenario arithmetic, not a mortgage offer, agreement in principle, tax assessment or scheme/credit approval.
Enter only contract-permitted extras. Early-repayment charges and annual overpayment allowances are not inferred. 26/52 periods are approximations, not a dated daily-interest lender statement.

References and further reading

Worked United Kingdom example: UK Amortization Schedule

This is a hypothetical arithmetic example in GBP, not a current lender quote, market observation or borrower record. The same calculator model produces the figures below. Its input assumptions are shown so that you can reproduce or change the scenario.

Assumed input	Illustration value
Current principal including financed fees (GBP)	262,500
Actual / scenario annual nominal mortgage rate (%)	4.48
Remaining repayment years	25
Payment frequency	Monthly
Permitted extra principal per payment (GBP)	0
One-time permitted lump sum (GBP)	0
Apply lump sum at payment period	1
Permitted lump sum at each year-end (GBP)	0
Accelerated weekly / biweekly plan?	No

Calculated measure	Result
Scheduled principal & interest per payment	£1,456.08
Projected interest with entered extras	£174,324.58
Interest saved versus the same plan without extras	£0.00
Payments until payoff	300
Repayment years saved	0
Ending balance	£0.00

Amounts use unrounded intermediate arithmetic and are rounded only for display. Selecting different costs, rates, payment dates or terms changes the result; no illustration value is prefilled into your personal financial fields.