What are the tax implications of selling my house with mortgage arrears?

The tax treatment of a house sale depends mainly on how the property has been used, who owns it and whether the sale creates a taxable gain. Mortgage arrears affect the financial settlement and the distribution of the proceeds, but they do not normally create a separate tax exemption.

For Capital Gains Tax purposes, the starting point is usually the difference between the property’s allowable cost and its sale value. Relevant costs can include the original purchase price, certain acquisition expenses, qualifying improvement works and eligible selling costs. Routine repairs, mortgage repayments and arrears payments are generally treated differently from capital costs and do not normally increase the property’s allowable cost.

• Main residence: a home occupied as your only or main residence may qualify for Private Residence Relief, subject to the detailed rules and the periods for which it was occupied.
• Former home: a property that was once your main residence may receive relief for qualifying periods, but the calculation can be restricted if it was later rented out, left empty or used for another purpose.
• Rental or second home: a property that was wholly or partly let, used as a holiday home or held as an additional property may produce a chargeable gain.
• Business use: using part of the property exclusively for business can affect the relief available. Normal incidental home working does not necessarily have the same treatment, so the details matter.

If only part of the property was used as your main residence, the gain may need to be apportioned. Ownership changes, periods of absence, letting arrangements and the dates of occupation can all affect the calculation. Letting Relief is not automatic and is subject to specific conditions, so it should not be assumed that renting out a former home will remove the tax charge.

Any taxable gain is considered alongside your other gains and allowable losses for the relevant tax year. Your available annual exempt amount and the applicable Capital Gains Tax rules may reduce the amount due, but these provisions can change. Keep records of the purchase, ownership, occupation, improvement and sale dates, together with invoices and completion statements.

Mortgage arrears create an important distinction between the property’s tax calculation and the money you receive. A lender may be paid from the completion proceeds, followed by other secured debts, sale costs and any agreed charges. The amount left for you may therefore be much lower than the figure used to calculate the gain. A shortfall, repayment of the mortgage capital or payment of arrears does not usually count as a deductible cost in the Capital Gains Tax calculation.

Where a lender agrees to accept less than the total mortgage debt, the treatment of the remaining debt can depend on the terms of the agreement and your wider financial circumstances. Debt written off, insolvency arrangements and other forms of debt compromise can have separate legal and tax consequences. Obtain specific advice before agreeing to a settlement if the sale price will not cover the secured borrowing and associated costs.

If the property has been rented out, rental income must generally be considered separately from the sale. Income received before completion may need to be reported, and allowable property expenses are governed by rules that differ from Capital Gains Tax. If the property belongs to a company, corporation tax and company distributions may also be relevant. These situations should be reviewed by an accountant rather than treated like an ordinary owner-occupied sale.

There is usually no Stamp Duty Land Tax bill for the seller simply because the property is sold. The purchaser normally deals with any SDLT due on the acquisition. However, the seller may still have taxable gains, professional fees, lender charges or other completion deductions. The sale contract and completion statement should show how the proceeds are allocated.

Joint owners should establish how the gain is divided and whether each owner has a separate tax position. Transfers between spouses or civil partners, changes in beneficial ownership and sales following separation or divorce can involve special rules. A transfer made before the eventual sale may have consequences different from selling the property jointly and dividing the proceeds afterwards.

Before committing to the transaction, ask your conveyancer for an estimated completion statement and prepare a separate tax calculation. Check the property’s ownership history, occupation dates, improvement invoices, rental records, mortgage settlement figure and any documented agreement concerning the arrears. If there is a possible Capital Gains Tax liability, seek advice from HMRC or a qualified tax adviser about the applicable reporting process and payment dates for your circumstances.

A cash purchaser can simplify the sale route, but the method of sale does not remove the need to identify and deal with any tax liability. Tax should be budgeted for separately from the amount needed to clear the mortgage arrears, because the two calculations are not ordinarily interchangeable.