Accountant for Car Dealers and the Motor Trade

A used car dealership is one of the few small businesses where the balance sheet, not the profit and loss account, tells you how the year is going. You can be holding £300,000 of stock, owing £240,000 against it, and running on the difference. Three positions decide everything else: the vehicles on the forecourt, the stocking finance secured on them, and the cash, a slice of which is not yours at all. Get those three recorded properly and the tax questions mostly answer themselves. Get them wrong and no amount of year-end work will fix it.

Stock, stocking finance and cash: the three positions

Start with the vehicles. Every car on the pitch is trading stock. It sits on the balance sheet as an asset at what you paid for it plus the cost of getting it retail-ready, and it stays there until it sells, at which point the whole accumulated cost drops into cost of sales in the same period as the sale. It is not a fixed asset, it does not depreciate for tax, and it attracts no capital allowances. That single classification governs the year-end stock take, the gross margin you report and the profit HMRC taxes.

Next, the stocking finance. A funding line secured on a specific vehicle is a liability of the business, recorded in full, and the interest and fees on it are a deductible expense of the period they relate to. The vehicle it funds stays on your balance sheet at cost regardless of how much of it the funder is effectively carrying. Dealers who net the two together, showing the car at its equity value, end up unable to answer the only question that matters when the bank or a buyer asks: how much stock do you own outright.

Then the cash. On margin scheme sales, part of every retail receipt is VAT you are holding for HMRC until the return is filed. It looks like working capital and it funds the next purchase, which is why the VAT quarter is the pressure point in this trade rather than the year end. A dealer who buys stock with money that was earmarked for the margin scheme VAT is not more liquid than a dealer who does not, only earlier in the same problem.

What a car on the pitch is actually worth on your balance sheet

Stock is valued at the lower of cost and net realisable value, item by item, not as a total. Cost means the purchase price plus the direct costs of preparation: bodywork, mechanical rectification, valeting, an MOT test where you paid for one, transport in. Net realisable value means what you will realistically get for it now, less the cost of getting there.

Two things follow from doing it car by car. A car that has been on the pitch for eleven months and will now only fetch £4,200 against £5,600 of cost is written down to £4,200, and that write-down is a real deduction against this year's profit. But a car that will comfortably sell above cost is never written up, so the profit on it belongs to the year it sells, not the year you happened to buy it well. Ageing stock is therefore both a cash flow problem and a tax event, and dealers who never look at the stock list line by line pay tax on profits they have not made and miss deductions they are entitled to.

Where the VAT on a used car actually comes from

Most used cars are bought from private sellers, which means there is no VAT on the purchase and nothing to reclaim. The second-hand margin scheme exists for exactly that situation. Instead of accounting for 20% on the full selling price, you account for VAT at one-sixth (16.67%) of the margin, the selling price less what you paid. Sell at £7,800 a car you bought for £6,300 and the margin is £1,500, so the VAT is £250.

Three points matter enough to state here even though the arithmetic belongs on its own page. Each vehicle stands alone: a loss on one car cannot be netted against a gain on another, and there is no such thing as a negative margin. Global accounting, the sub-scheme for high-volume dealers in low-value second-hand goods, is not available for vehicles. And the scheme is protected by paperwork rather than by status: you need purchase and sale invoices both ways plus a stock book with a number for every vehicle, and eligibility is lost car by car where the records fail or where the vehicle came to you on a VAT invoice. HMRC's rules are in the gov.uk margin schemes guidance and, for vehicles specifically, VAT Notice 718/1. Our margin scheme page for used car dealers works the calculation and the stock book in full.

One trap catches new dealers hard. The £90,000 VAT registration threshold, and the £88,000 deregistration threshold, both in force since 1 April 2024, are tested on your full selling prices, not on your margins. A dealer turning over £400,000 of cars at a 15% margin is nowhere near £90,000 of margin and is a long way past the registration point.

A dealership year, from forecourt to corporation tax

Stefan runs a used car pitch in Gloucester through a limited company with two employees and a small workshop at the back. His year ended 31 March 2027. Every figure below is derivable from the ones above it.

Sales and margin. He sold 120 vehicles for £1,560,000 in total, having paid £1,320,000 for them, all bought from private sellers with no VAT on the purchase. His total margin is £1,560,000 minus £1,320,000, which is £240,000.

VAT. Under the margin scheme, output VAT on those sales is one-sixth of £240,000, which is £40,000. Had the same cars been sold outside the scheme, VAT would have been one-sixth of the full £1,560,000, which is £260,000. That £220,000 gap is the whole reason a stock book is worth keeping properly. His gross profit after VAT is £240,000 minus £40,000, which is £200,000.

Running costs. Premises, insurance and utilities £34,000. Wages for the two employees £46,000. Advertising and platform listing fees £11,000. Stocking finance interest and fees £9,000. Other running costs £8,000. That totals £108,000.

The employer National Insurance on those wages is 15% above the £5,000 secondary threshold, the rate and threshold in force from 6 April 2025. The two salaries are £24,000 and £22,000, so the charge is 15% of (£19,000 plus £17,000), which is 15% of £36,000, or £5,400. The £10,500 Employment Allowance covers it in full here, so nothing is payable. Pension contributions are left out of this illustration to keep the lines traceable; a real set of accounts would carry them.

Capital allowances. He bought a new two-post lift and diagnostic equipment for £12,000. That is new and unused main-rate plant and machinery, so the £1,000,000 Annual Investment Allowance gives 100% relief in the year: a £12,000 deduction. None of the 120 cars generates any allowance, because they are stock.

Taxable profit. £200,000 minus £108,000 minus £12,000 equals £80,000.

Corporation tax. For financial year 2026, profits of £80,000 fall between the £50,000 lower limit and the £250,000 upper limit, so marginal relief applies. Tax at the 25% main rate is £20,000. Marginal relief is 3/200 of (£250,000 minus £80,000), which is 3/200 of £170,000, or £2,550. Corporation tax due is £20,000 minus £2,550, which is £17,450, an effective rate of 21.8%. Check it the other way: £50,000 at 19% is £9,500, and the £30,000 slice above that at the 26.5% marginal rate is £7,950, giving the same £17,450. Payment is due nine months and one day after the year end, so 1 January 2028.

If Stefan had a second company, the £50,000 and £250,000 limits would be divided between them, which pushes more of the same profit into the 25% band. That catches dealers who put the workshop or a separate site into its own company without checking the effect.

What actually qualifies for capital allowances

The workshop is where the allowances are: ramps, lifts, compressors, diagnostic equipment, tyre machines, tooling, valeting equipment, office and IT kit. The Annual Investment Allowance gives 100% relief on up to £1,000,000 of qualifying plant and machinery a year, and it is use-it-or-lose-it rather than something you carry forward. For assets bought new and unused there is also a 40% first-year allowance introduced from 1 January 2026, which leaves the balance in the pool rather than clearing it, so on most workshop purchases the Annual Investment Allowance is simply better. Where spending exceeds the allowance, the main-rate writing-down allowance takes over, and that rate steps down from 18% to 14% from 1 April 2026 for companies and 6 April 2026 for sole traders and partnerships. Integral features such as electrical and heating systems sit in the special rate pool at 6%.

Cars are excluded from the Annual Investment Allowance and from the first-year allowances, without exception, and that catches dealers twice: once on the stock, which never qualified because it is stock, and once on any vehicle the business genuinely holds as a fixed asset. If you hold a car as a business asset rather than as stock, the mechanics are on our writing down allowance on cars page, which deals with that treatment properly. Demonstrators are a question of their own, because a car can move between stock and business use and back, and that sits on our dealership operations page along with part-exchange handling and the workshop side.

Sole trader, partnership or limited company as a dealer

Structure is a trade-off, not a ranking. As a sole trader you and the pitch are the same legal person: profits are taxed as income tax plus Class 4 National Insurance, liability is unlimited, and there is one self assessment return a year. For 2025/26, still current when this page was checked in August 2026, Class 4 runs at 6% between £12,570 and £50,270 and 2% above, with income tax at 20%, 40% and 45% across the same personal allowance and band structure. A limited company is a separate legal person paying corporation tax at 19%, 25% or the marginal rate between, with profit extracted as salary and dividends and statutory accounts to file.

Motor traders reach for a company more often than most trades, for two reasons that are not tax reasons. Consumer liability is real in this business, and the sums held on stocking finance are large relative to the size of the operation. Neither is a tax argument, and neither settles it: run it as a calculation at your actual profit level before you incorporate, because at typical single-site dealer profits the tax saving is modest.

Payroll for a small dealership

Sales staff on commission, a technician, a valeter and a part-time administrator is a common shape, and it puts you squarely inside PAYE and Real Time Information reporting: submissions on or before each payday, employer National Insurance at 15% above the £5,000 secondary threshold from 6 April 2025, and pension auto-enrolment for anyone aged 22 to State Pension age earning over the £10,000 trigger. Commission-heavy pay needs care, because a variable month can push someone over an auto-enrolment threshold they were under the month before. The loaded cost of a hire is the salary plus employer National Insurance, plus at least 3% employer pension on qualifying earnings, plus the payroll running cost and the holiday and statutory pay exposure, and it is meaningfully above the headline wage.

Choosing an accountant for the motor trade

Ask three questions and the field narrows quickly. First: have you seen my stock book, and does it satisfy VAT Notice 718/1 vehicle by vehicle. An accountant who has never asked to see it is not looking after the largest number on your return. Second: how are you valuing my stock at the year end, and can you show me the write-downs. Third: how is my stocking finance presented, and does the balance sheet show what I own outright.

Sector familiarity matters more than proximity here, since cloud bookkeeping means the firm that understands per-vehicle margin tracking may be a long way from your postcode. What you are buying is somebody who reads the stock list, not somebody who files a return from a spreadsheet total.

One boundary worth stating plainly, because it comes up: we do not act on consumer claims of any kind; our work is the accounts and tax of the dealership.

What to bring to a first meeting

Bring the stock list as it stands today, the last VAT return, and the stocking finance statements. Those three between them answer most of what we would otherwise spend an hour asking. If you want to read up first, the pages below are the ones that matter.

If VAT on your vehicles is the question, start with the margin scheme worked through in full. If it is the day-to-day mechanics of stocking finance, demonstrators, part-exchange and the garage side, that is the dealership accounting page. For the wider records and compliance picture, our bookkeeping and compliance hub covers the rest. If you would rather someone looked at your actual stock list and last VAT return, get in touch.