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APR Interest Cost Calculator

Estimate what a loan or finance deal could really cost over time using the APR, repayment term and any extra fees.

Calculator inputs

Amount borrowed (£)

APR (%)

Live APR 9.90%

Borrowed amount £10,000.00

Years

Additional months

Repayment term 3 years

Arrangement fee paid upfront Arrangement fee added to loan

Arrangement fee (£)

Monthly fee (£)

Estimated monthly payment £322.20

Total repaid £11,599.31

Total borrowing cost £1,599.31

Total interest £1,599.31

Amount borrowed	£10,000.00
Opening balance used for repayments	£10,000.00
Base monthly repayment	£322.20
Total fees	£0.00
Fee treatment	Arrangement fee paid upfront
Borrowing cost as % of amount borrowed	15.99%
Total borrowing cost	£1,599.31

Principal repaid £10,000.00

Interest share of total cost 100.00%

Fees share of total cost 0.00%

Milestone	Payment	Balance left	Cumulative interest	Cumulative fees	Cumulative paid
Year 1	£322.20	£6,989.43	£855.83	£0.00	£3,866.40
Year 2	£322.20	£3,666.90	£1,399.70	£0.00	£7,732.80
Year 3	£322.31	£0.00	£1,599.31	£0.00	£11,599.31

Assumptions:

APR is treated as a nominal annual borrowing rate converted to a monthly rate for this estimate.
Monthly payments are assumed to stay level across the chosen term unless the final month needs a small adjustment for rounding.
APR in the real world may already reflect certain fees, but this calculator shows interest and fees separately for transparency.