Secured Loans for Tax Bills: HMRC, CGT and Inheritance Tax (2026 UK Guide)

Can you use a secured loan to pay a tax bill?

Yes. Tax liabilities are a recognised loan purpose for second charge mortgages, and most UK secured loan lenders will fund self-assessment, capital gains tax, inheritance tax, VAT, and corporation tax bills.

The mechanics are straightforward. The lender treats the tax bill like any other loan purpose — assess affordability, value the property, register the charge, and release funds to your bank account (or in some cases pay HMRC directly to evidence the funds reached the right place).

What lenders want to see is a copy of the HMRC demand or self-assessment statement showing the amount due, plus your usual income and identity documentation.

Why a secured loan beats HMRC's interest and penalty regime

HMRC charges late payment interest of 7.75% in April 2026 — but the bigger cost is the penalty regime stacked on top: 5% of unpaid tax at 30 days, another 5% at 6 months, and another 5% at 12 months for self-assessment.

A secured loan at 7–9% APR avoids the penalty stack entirely. On a £40,000 tax bill paid 12 months late, HMRC penalties alone would total £6,000 — more than three years of interest on the equivalent secured loan.

The maths gets sharper for capital gains tax on property disposals, where 60-day reporting deadlines are tight and the bill can be substantial.

Common tax-bill scenarios that suit a secured loan

Self-assessment liabilities are the most common case — particularly for self-employed borrowers, landlords, and limited company directors taking dividends, where the January 31 deadline catches cash flow off-guard.

Capital gains tax on property disposals comes second. Selling a buy-to-let or second home triggers a CGT bill due within 60 days; if the sale proceeds are tied up in the next purchase, a secured loan against your main residence can bridge the gap.

Inheritance tax is the third major use case. IHT is due 6 months after death, but probate often takes 9–12 months to release the estate's funds. Beneficiaries use secured loans against their own homes to pay HMRC and unblock probate.

Less common but valid: VAT bills for sole traders, corporation tax for company directors paying personally, and payments on account that have grown unmanageable.

Speed: meeting HMRC deadlines

Most secured loans complete in 2–4 weeks. For straightforward profiles, completion in 10–14 working days is achievable when all parties move quickly.

If your HMRC deadline is closer than the secured loan completion timeline, request a Time to Pay arrangement from HMRC. They typically grant 30–60 days when you can demonstrate funds are imminent — provide the lender's offer letter as evidence.

Don't wait until the last week. Start the secured loan application 6+ weeks before the deadline if possible.

Will my existing mortgage lender consent?

Yes, in nearly all cases. UK first-charge mortgage lenders routinely consent to second charges being registered behind them, regardless of the loan purpose.

The only stage where the loan purpose matters is the second charge lender's own underwriting — and tax bills are widely accepted. Charles Frank Finance has placed secured loans for HMRC liabilities ranging from £8,000 self-assessment to £350,000 inheritance tax.

What to bring to your application

The HMRC documentation: a copy of the demand or self-assessment statement showing the amount, the tax year, and the deadline.

Standard secured loan documentation: photo ID, proof of address, three months of payslips or two years of SA302s if self-employed, three months of bank statements, your latest mortgage statement.

If the bill is for a third party (e.g. you're paying inheritance tax on behalf of an estate), the executor's evidence and probate documentation.

Your home may be repossessed if you do not keep up repayments on a mortgage or any other debt secured on it. Always seek tax advice from a qualified accountant before assuming a borrowing decision is the right route — sometimes a Time to Pay arrangement is genuinely the cheaper option.