BORROWING COST
Overdraft cost calculator
Estimate simple overdraft interest for a balance and number of days.
Estimated result
£32.79
- Balance
- £1,000
- Daily equivalent
- £1.09
- Annual rate
- 39.9%
Assumes a constant balance and excludes unarranged-overdraft or account fees.
SOURCES & REVIEW
Checked against official guidance
Last checked 14 July 2026 · Rule version GB-2026.27.1
FCA: Overdrafts ↗COMMON QUESTIONS
Frequently asked questions
Is this an exact quote or tax return?
No. It is an estimate based on the inputs and assumptions shown.
When was this checked?
The method and linked official guidance were reviewed for the current UK release.