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Debt Debtors case type Late Payment Interest updates : December 2025

The effect of Bank of England Interest Rates in the Late Payment Interest maths in the Debt Debtors case type.

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Written by Tim Barlow
Updated over a month ago

The Bank of England's Interest Rate announcement of the 18th December 2025 reduced the rate to 3.75%. This means the applicable rate for the Late Payment Interest calculations from the 1st January 2026 onwards will be 3.75%.

Changes can be made to your Proclaim system now to anticipate this change.

To amend the Late Payment interest calculations, please follow the steps below:

  1. Open Database Maintenance and from the case type dropdown select Debt Debtors

  2. Locate the field Debt - Schedule Late Payment current bank base rate calc and open the Editor to access the maths
    ​
    ​Note - this field may have a different name in older versions of Debt which are not running the tabulated debt schedule, however, it should be identifiable from the presence of "Late Payment current bank base rate calc"

  3. Find the following section at the very end of the maths:
    ​

            # ========== 
    # Default rate
    # ==========
    IF n-rate = 0.00 THEN
    n-rate = 3.75
    END
    END
    END
    result = n-rate

  4. Delete this.

  5. Add the following to the bottom of the maths in place:


    ​

            IF n-rate = 0.00 THEN 
    start-date = DAYS-FROM-TODAY( "01/07/2025" )
    end-date = DAYS-FROM-TODAY( "31/12/2025" )
    IF n-days >= start-date AND n-days <= end-date THEN
    n-rate = 4.25
    END
    END
    # ==========
    # Default rate
    # ==========
    IF n-rate = 0.00 THEN
    n-rate = 3.75
    END
    END
    END
    result = n-rate


    ​

Alternatively, you can copy and paste the whole maths from the attached .txt file.
​

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