Balancing Charge on Asset Disposal: Calculation, Reporting, and Records

A balancing charge on asset disposal is the amount HMRC adds to your taxable trading profits when you sell, give away, scrap, or stop business use of an asset and the disposal value exceeds what’s left of that asset in your capital allowances pool. It claws back the portion of tax relief that turned out to exceed the asset’s real drop in value, and it’s taxed as trading income in the accounting period the disposal happens.

What Counts as a Disposal

Any event that takes an asset out of your business counts as a disposal for capital allowances purposes. Selling equipment is the obvious one, but the list runs wider than that. Giving an asset away, converting it to personal use, scrapping it, and receiving an insurance payout after theft or destruction all count.¹ Trading in an old machine for a new one is a disposal of the old item, even though it feels like one transaction.

Closing the business is the most comprehensive trigger. HMRC treats cessation as a disposal of every asset still sitting in your pools, so each one needs a final reconciliation.²

How the Calculation Works

Capital allowances run through a pooling system. Instead of tracking each asset separately, most items go into one of two shared pools, and each pool’s balance reduces every year by a fixed writing down allowance percentage. What’s left after those annual deductions is your tax written down value, and it’s the number the balancing charge test compares the disposal value against.

The main rate pool covers most plant and machinery — computers, office furniture, vans, general equipment — and takes an 18% writing down allowance each year on a reducing balance. The special rate pool covers integral building features, long-life assets, thermal insulation, and high-emission cars, with a 6% writing down allowance.³ A single asset pool is used where you have private use of an asset as a sole trader or partner, where you elect short-life asset treatment, or for cars with private use.²

The arithmetic itself is simple. Subtract the pool balance from the disposal value. If the result is positive, that’s your balancing charge, and it gets added to your trading profits for the period.

Take a worked example. You bought a van for £10,000 and claimed the full cost through the annual investment allowance, leaving your pool at nil. Three years later you sell the van for £4,000. Because the pool balance is zero, the whole £4,000 is a balancing charge.² If the pool balance had been £500, the balancing charge would be £3,500. If the balance had been £6,000, there would be no balancing charge at all: the £4,000 disposal value would simply reduce the pool to £2,000, and you’d continue claiming writing down allowances on that remainder.

One rule catches people out. If you claimed AIA or a first-year allowance on everything you’ve ever bought, the pool balance can be nil even though you still own assets. The moment you sell any of them, the full sale price becomes a balancing charge because there’s nothing in the pool to absorb it.²

The written down value in your pool is not the same as the book value in your accounts. Commercial depreciation uses whatever method your accountant chooses; capital allowances follow statutory percentages.⁴ The two figures can diverge, so check the pool balance rather than the balance sheet before selling anything.

The Cap at Original Cost

If you sell for more than you originally paid, HMRC caps the disposal value at the original cost.¹ A balancing charge can therefore never exceed the total allowances you previously claimed on the asset. Any profit above original cost is a capital gain, handled under separate rules.

Super-Deduction and Full Expensing Disposals

Companies that claimed the 130% super-deduction, full expensing, or the 50% special rate allowance face an automatic balancing charge on disposal. For items that received the 50% special rate allowance, HMRC’s formula treats 50% of the disposal value as a balancing charge, with the other 50% applied to the special rate pool. If that reduction pushes the pool below zero, a further balancing charge arises on the excess.²

When You Get a Balancing Allowance Instead

A balancing charge only arises when the disposal value exceeds the pool balance. The opposite outcome — selling for less than the pool balance — does not automatically give you relief, and this is where many people misread the rules.

For the main pool and the special rate pool, a shortfall does not produce a balancing allowance during normal trading. The reduced pool balance simply carries forward, and you keep claiming writing down allowances on it. A balancing allowance on those pools only arises when you cease trading. If the pool balance after subtracting all disposal values is still positive at cessation, that remainder can be deducted from your final-year profits.²

Single asset pools work differently. Because the pool contains only one item, disposing of it closes the pool. If the disposal value is less than the pool balance, you can claim a balancing allowance immediately, whether or not the business continues.² That’s one of the main reasons to elect short-life asset treatment: if the asset drops in value quickly, you recover the unclaimed relief sooner instead of watching it trickle out through years of main pool deductions.

Sales to Connected Parties and Gifts

Selling to a relative, a company you control, or another connected party triggers a market value substitution. HMRC treats the transaction as if it happened at market value regardless of the price actually agreed.⁵ The rule applies when a control test is met — one party controls the other, or a third party controls both — or when the main purpose of the price is to gain a tax advantage.

The same market value rule applies when you give an asset away or start using it personally. Selling to a connected party at an artificially low price will not sidestep a balancing charge: HMRC substitutes market value and calculates the charge from that figure, and both sides of the transaction have their capital allowances recalculated on the same basis.⁵

Reporting the Charge on Your Return

A balancing charge counts as trading income, not a capital gain. It is therefore taxed at your income tax or corporation tax rate and added directly to business profits for the accounting period in which the disposal happened.¹

Companies report the charge in the capital allowances section of their CT600 return, adjusting overall taxable profits. Sole traders and partners include it in the capital allowances area of their self-assessment return. In the year you close the business, you enter a balancing charge or balancing allowance on the return instead of claiming writing down allowances.¹ Timing matters: the charge belongs in the period the disposal occurs, not when payment arrives.

Leaving a balancing charge off the return under-reports trading profits, which can lead to penalties and interest. If you claimed AIA on several assets over several years and then dispose of them within a single period, the cumulative charges can be large enough to push you into a higher tax bracket, so factor this in before any disposal.

Why AIA and Full Expensing Enlarge the Risk

The more aggressively you claim first-year relief, the greater the potential balancing charge later. When AIA or full expensing takes an asset’s contribution to the pool straight to nil, the entire eventual sale price becomes a balancing charge because there is no remaining pool value to absorb it. That trade-off is usually worthwhile if you hold the asset until it is nearly worthless, but selling it early or converting it to personal use can erase a large part of the benefit.

Records to Keep

You need a running record of each pool’s balance, the allowances claimed each year, original purchase costs, and disposal values. HMRC does not ask you to submit that detail with the return, but you have to produce it on request. The further back your claims stretch, the more important the documentation becomes, because a disposal calculation can reach back to the first year you claimed relief on that asset.

If You’re Looking at the US Equivalent

The United States does not use the term “balancing charge.” The equivalent mechanism there is called depreciation recapture, governed by separate rules under the Internal Revenue Code — most notably Section 1245 for personal property and Section 1250 for real property — and reported on Form 4797 rather than through a pooling system. The goal is similar, but the mechanics and thresholds are not interchangeable with the UK rules above.

1
GOV.UK. Capital Allowances When You Sell an Asset
2
GOV.UK. HS252 Capital Allowances and Balancing Charges 2025
3
GOV.UK. Work Out Your Writing Down Allowances – Rates and Pools
4
GOV.UK. Capital Allowances – New First-Year Allowance and Reducing Main Rate Writing-Down Allowances
5
HM Revenue & Customs. Capital Allowances Manual – CA13100 – General: Connected Person and Control Sales