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HMRC error messages · Income Tax

RULE_MISALIGNED_PERIOD

The dates of the update fall outside the accounting period HMRC holds for that business.

HMRC's message · HTTP 400
Period summary is not within the accounting period

When it appears

Sending a quarterly update for self-employment or property income.

What to check

  • The update's start and end dates.
  • The business's accounting period and start date at HMRC.
  • Whether the business uses standard or calendar quarters.

How to fix it

Set the update dates to match the obligation HMRC shows for the business, and resend.

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