HMRC has decided to reduce the interest rate on overdue tax payments following the recent decrease in the Bank of England’s base rate. The Bank of England has lowered its base rate from 4% to 3.75%, benefiting numerous borrowers and individuals with outstanding tax liabilities to HMRC.
For self-assessment taxpayers, HMRC currently imposes an interest rate of 8% on late tax payments, which will be reduced to 7.75% starting January 9, 2026. Late payment interest is calculated at the base rate plus 4%, while the repayment interest paid by HMRC for overpaid taxes or refunds is being lowered to 3.5%.
Repayment interest is determined as the base rate minus 1%, with a minimum threshold of 0.5%. These adjustments are in line with the Bank of England’s base rate reduction and will impact individuals managing their tax obligations.
The changes in interest rates coincide with the upcoming deadline for self-assessment tax returns on January 31. Failure to file online by this date incurs an immediate £100 penalty, escalating to daily fines of £10 up to a maximum of £900 after three months. Further penalties are imposed at six and twelve months for non-compliance.
To avoid facing penalties and interest charges, taxpayers must ensure timely submission of tax returns and payments. Individuals struggling to settle their tax bills, with amounts below £30,000, may qualify for a payment plan through HMRC’s Time to Pay scheme.
Self-assessment is mandatory for self-employed individuals, those with additional income sources, property rental income earners, and high-income individuals claiming Child Benefit. Adherence to tax deadlines and obligations is essential to prevent financial penalties and ensure compliance with HMRC regulations.
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