The tax implications of buying a commercial property at auction

Buying a commercial property at auction can be an exciting opportunity for business owners and investors. The competitive bidding, the quick completion timescales, and sometimes attractive pricing make auctions appealing. However, the tax implications are often overlooked in the rush to secure a property. At Severn Accounting, we work with many clients across Worcester and beyond who’ve purchased commercial properties through auctions, and we’ve seen how understanding the tax side upfront can save considerable stress — and money — later.

This guide covers the key tax considerations you should be aware of before, during and after an auction purchase.

Stamp Duty Land Tax (SDLT)

Stamp Duty Land Tax is perhaps the most immediate tax concern for any property purchase. For commercial properties, the SDLT rates and thresholds differ from residential purchases, which is a crucial distinction.

As of the 2024/25 tax year, commercial property SDLT is charged on a sliding scale. Properties up to £150,000 are exempt; between £150,001 and £250,000, you pay 2%; from £250,001 to £500,000, you pay 5%; and above £500,000, you pay 10%. Unlike residential purchases, there are no additional rates or surcharges for commercial property.

An important point: SDLT becomes due within 14 days of completion, regardless of auction terms. Auction properties often complete quickly — sometimes within weeks — so factor this liability into your cash flow forecasting. If you’re purchasing through a limited company structure, the same rates apply, though the exemptions may differ slightly depending on how the company is classified.

Capital Allowances and Corporation Tax

If you’re a limited company buyer, understanding capital allowances is vital. Commercial properties themselves don’t qualify for capital allowances, but the plant and machinery within them often do. This might include fitted kitchens, fire safety systems, air conditioning units, or specialized flooring.

At the point of purchase, it’s worth obtaining a detailed breakdown of the purchase price. Asking your surveyor or conveyancer to apportion costs between the building fabric and plant and machinery can unlock significant tax relief. Under the Annual Investment Allowance (AIA), companies can claim 100% capital allowance relief on qualifying plant and machinery up to £1,000,000 in a single accounting year (2024/25). This can substantially reduce your Corporation Tax liability in the year of purchase.

Income Tax and VAT Considerations

If you’re a sole trader or partnership purchasing the property, similar principles apply, though you’ll claim capital allowances against your Income Tax bill rather than Corporation Tax. Make sure your accountant reviews the apportionment carefully.

VAT is another layer. Most commercial property sales are exempt from VAT. However, the seller may have elected to charge VAT (known as ‘opting to tax’). If this applies, you cannot usually recover the VAT paid. Before bidding at auction, check the legal pack carefully — it should disclose whether VAT will be charged. If it will be and you can’t recover it, this significantly affects your true acquisition cost.

Ongoing Tax Obligations

After purchase, your ongoing tax position depends on how you use the property. If you’re letting it commercially, rental income is taxable. Expenses are deductible — mortgage interest, repairs, maintenance, insurance — though capital improvements are not (they feed into capital allowances instead).

If you’re occupying it yourself as a business premises, you won’t have rental income, but you should still consider whether you’re entitled to claim capital allowances on the fit-out and equipment.

Companies must file a Corporation Tax return (CT600) within 12 months of their accounting date. Sole traders and partnerships file Self Assessment tax returns by 31 January following the tax year end.

Planning Ahead

The key takeaway is this: don’t wait until after completion to think about tax. Engage your accountant before the auction, particularly if it’s a significant purchase. They can help you model different ownership structures (company versus personal), advise on apportionment strategy, and ensure you understand the true post-tax cost of the property.

Auction purchases move quickly, but tax planning doesn’t need to be rushed. With proper advice upfront, you can make informed decisions and maximise your tax efficiency from day one.

For tailored advice, contact Severn Accounting — we’re here to help.