This is a preview version of the API intended for early testing and integration. Preview versions are not stable and may include breaking changes before general availability.
UkISAAllowance
ISA allowance figures for one allowance type and tax year, as stated by the provider.
Which allowance the figures are measured against. OVERALL is the annual ISA allowance shared by all of a person's ISAs (£20,000 in 2026/27). LIFETIME_ISA is the Lifetime ISA's own limit (£4,000), which sits inside OVERALL.
OVERALL or LIFETIME_ISA.The allowance limit as quoted by the provider. This is the statutory per-person limit, not a limit for this account or provider.
Allowance left as far as this provider knows. It does not account for payments into ISAs at other providers. It can exceed the limit on flexible ISAs (withdrawals that can be paid back in), and it is shared between ISAs at the same provider. Never add it up.
ACCOUNT if the figures are this account's own. PROVIDER if they are the provider's total across all of the person's ISAs with it; the same entry then appears on each of those ISAs and should be counted once.
ACCOUNT or PROVIDER.The UK tax year the figures are for (6 April to 5 April), e.g. 2026/27.
Amount paid in during the tax year, as stated by the provider. It excludes ISA transfers in and the Lifetime ISA government bonus. This is the figure that can be added up across providers.
{ "allowanceType": "OVERALL", "limit": { "amount": 10.32, "currency": "EUR" }, "remaining": { "amount": 10.32, "currency": "EUR" }, "scope": "ACCOUNT", "taxYear": "2026/27", "used": { "amount": 10.32, "currency": "EUR" }}