Overview
- More than 3.5 million 2024–25 returns are already filed, with HMRC urging others to start early to know their bill in good time.
- For disposals on or after 30 October 2024, returns will not auto-apply the new Capital Gains Tax rates, so taxpayers may need the GOV.UK adjustment calculator.
- Many who only file to pay the High Income Child Benefit Charge can choose PAYE collection and de‑register from Self Assessment where eligible.
- Paper filers face a 31 October 2025 cut-off, while online returns are due by 31 January 2026.
- Late filing brings a fixed £100 penalty that escalates if unresolved, and HMRC warns users to watch for scams and never share login details.