How DelayDocket estimates statutory interest

DelayDocket uses a simplified UK commercial late-payment estimate for overdue business invoices. It is built for practical follow-up, not for edge-case litigation strategy.

• Annual rate: base rate entered by the user + 8 percentage points.
• Interest model: simple interest, calculated as invoice amount × annual rate × overdue days / 365.
• Overdue days: the whole-day difference between the due date and the calculation date, never less than zero.
• Fixed compensation: £40 below £1,000, £70 from £1,000 to £9,999.99, and £100 at £10,000 or above when enabled.

Reminder brief logic

The generated paragraph changes tone based on reminder stage:

• First clear nudge: calm, factual prompt with the current add-on.
• Firm reminder: clearer request to settle promptly with updated figures.
• Final pre-escalation reminder: still commercial, but more explicit that the overdue balance and statutory add-ons are being maintained.

Important limits

• If your contract already sets a different late-payment interest rate, statutory interest may not apply the same way.
• Public authority contracts and jurisdiction-specific rules can have extra conditions.
• DelayDocket does not verify enforceability, service dates, or contractual disputes.

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