Households in the UK are at risk of being fined by HMRC, with possible fines ranging from £100 to £900. The fines are related to a deadline, which some reports suggest is in January 2026, while others indicate that households will be fined starting in May or after a grace period. The fines may be imposed daily, with some reports mentioning a £10 daily penalty, although the exact timing and details of the fines are not consistent across reports.