United Kingdom

Interest on Costs

Calculating interest on legal costs for Commercial Court cases and post-judgment periods

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Post-Judgment Interest at 8%

It is well established that interest on costs is 8% post-judgment. The calculator allows for treatment of payments on account, so that users can immediately see how the interest is reduced by an interim payment.

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Commercial Court Cases

In Commercial Court cases (but not general KBD cases) interest is often obtained from the period when the bills are paid by the client. The rate of interest on that is often a commercial rate rather than a fixed one. Either way, the calculator at interest.law enables immediate calculation of what the interest would be on multiple bills, facilitating prompt settlement negotiations.

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Clear Breakdowns for Negotiations

All calculations are supported by breakdowns and tables to aid with giving advice, getting instructions, and negotiating with opponents. The transparency of the calculation methodology enables confident discussions around costs interest.

Key Benefits

  • Calculate interest on multiple bills paid at different times
  • Apply commercial rates or fixed 8% post-judgment rate as appropriate
  • Account for payments on account and see instant impact on interest
  • Generate clear breakdowns for client advice and opponent negotiations

Calculate Interest on Costs Now

Use our UK calculator to work out interest on legal costs with full breakdown tables for Commercial Court cases and post-judgment periods.

Post-Judgment (8%) Commercial Rate