late_payment_interest

Statutory interest and fixed compensation on a late commercial invoice (base rate plus 8%).

1 credit a call. No key needed to start.

Try it

curl "https://ukdata.reliness.co.uk/v1/late_payment_interest?invoiceAmount=...&dueDate=..."

Parameters

invoiceAmount (number, required)
dueDate (YYYY-MM-DD, required)
paidDate (YYYY-MM-DD)
baseRateOverride (number)

Use it from an agent

Part of the UK business calculators MCP server at https://ukdata.reliness.co.uk/mcp/uk-business-calculators, or call https://ukdata.reliness.co.uk/v1/late_payment_interest with GET or POST.

{
  "mcpServers": {
    "uk-data": {
      "url": "https://ukdata.reliness.co.uk/mcp/uk-business-calculators"
    }
  }
}

Every caller gets 25 free credits a day without a key. For more, get a free key with 300 credits at ukdata.reliness.co.uk.