Before you start — who files, and what SA106 does and doesn't cover
SA106 has a narrow, specific scope — the deceased's own pre-death foreign income — and a filing route that catches people out. Confirm both before opening the form.
What SA106 covers: the pre-death stub period only
If the deceased had foreign income or gains in the tax year they died — up to the date of death — the personal representative completes the deceased's own FINAL SA100 + SA106, covering 6 April of that tax year to the date of death, and no later.
What SA106 does NOT confidently cover: post-death foreign income during administration
Foreign income the ESTATE itself receives after death, while it's being administered, is a different question from the one SA106 answers for the deceased's own final year. Don't assume SA106's rules extend to that period without checking the correct route separately first.
Paper filing, not online, for a deceased person
HMRC will generally not accept a deceased person's SA100/SA106 filed online directly by the personal representative — it typically has to go in on paper, or be e-filed only where a professional tax agent uses commercial software on the PR's behalf. This changes both the workflow and the practical deadline pressure, so confirm the current filing route early, not the week before the deadline.
No SA106-specific deadline
SA106 follows whatever deadline applies to the SA100 it attaches to: 31 October for a paper return, 31 January for an online one — there's no separate date for the Foreign pages themselves.
SA106 has a narrow, specific scope — the deceased's own pre-death foreign income — and a filing route that catches people out. Confirm both before opening the form.