Calculate UK dividend tax liability

POST https://app.speybooks.com/api/v1/dividends/tax-calculator

Calculates UK dividend tax liability for a given gross dividend amount. Applies the £500 dividend allowance (2024/25 onwards) and splits across UK tax bands: basic rate (8.75%), higher rate (33.75%), additional rate (39.35%).

Request Fields

  • grossDividendPence — gross dividend in pence (required)
  • otherIncomePence — other taxable income in pence (default: 0). Used to determine which tax band the dividend falls into
  • personalAllowanceUsedPence — personal allowance already applied to other income (default: 1257000, i.e. £12,570)

The response includes per-band tax breakdowns and the effective rate. This is an informational calculator — it does not create any records or journals.

Body parameters

grossDividendPence integer optional
Gross dividend amount in pence.
otherIncomePence integer optional
Other taxable income in pence (salary, rental, etc.). Default 0.
personalAllowanceUsedPence integer optional
Personal allowance already used in pence. Default 1257000 (£12,570).

Response

200 Tax calculation result with breakdown by band, effective rate, and net dividend.
Show response fields
calculation object
Show child attributes
additionalRate object
Show child attributes
rate number
taxPence integer
basicRate object
Show child attributes
rate number
taxPence integer
dividendAllowancePence integer
effectiveRate number
higherRate object
Show child attributes
rate number
taxPence integer
netDividendPence integer
taxableAfterAllowancePence integer
totalTaxPence integer
input object
Show child attributes
grossDividendPence integer
otherIncomePence integer
personalAllowancePence integer
taxYear string

Error codes

400 Validation error in calculation inputs.