Tax planning for selling your business starts before the buyer asks for a data room. The sale structure, shareholder residence, historic records and payment terms can change the result. Leave those questions to the final week and the agreement may already have decided them.
What should tax planning cover before a business sale?
Start with a written map of the seller, the company, the buyer and every country connected to the deal. Confirm what is being sold, who owns it, where management has occurred and what taxes can arise on closing, deferred consideration and later earn-outs. This is the base for a defensible sale plan.
Build the map from contracts, cap table, statutory accounts, payroll, IP registrations, intercompany agreements and prior tax filings. A buyer will review the same material. If trading has crossed borders, read our guide to tax pitfalls of working across multiple countries before assuming one country's rules settle the analysis.
Does a share sale or an asset sale change the tax result?
Yes. A share sale transfers ownership of the company. An asset sale moves selected business assets and can leave liabilities or cash behind. The seller and buyer often prefer different allocations, so the commercial headline price is only one part of the negotiation.
For a US asset acquisition that falls within the rule, the IRS Form 8594 instructions say both seller and purchaser report the sale of a group of business assets where goodwill or going-concern value attaches or could attach. Put the allocation, valuation support and tax clauses into the deal workstream early. The exact treatment depends on the relevant jurisdiction.
Which dates and ownership facts need checking?
Check acquisition dates, changes in share classes, option exercises, reorganisations, periods of non-trading activity and the date on which a binding sale is created. Reliefs commonly depend on ownership and activity conditions measured before disposal. A late discovery can turn a planned outcome into an avoidable cost.
For a concrete UK example, HMRC's Business Asset Disposal Relief guidance states that qualifying gains on assets disposed of from 6 April 2026 are taxed at 18%; the page also sets eligibility conditions. That is an in-force UK rule, not a global benchmark. Confirm the seller's facts and residence before using it in a model.
How should earn-outs and deferred consideration be handled?
Earn-outs, retention payments, loan notes and instalments need separate tax analysis from the upfront price. The answer can depend on whether the payment is purchase consideration, employment income or a contingent right, and on the timing of recognition. Do not accept a label in a term sheet as a tax conclusion.
Write the commercial reason for every deferred amount. Then align the share purchase agreement, board minutes, valuation papers and payroll treatment. A payment to a founder who remains employed attracts more scrutiny than a clean payment for transferred shares.
What should be prepared for tax due diligence?
A sale-ready file should let a buyer trace tax positions without reconstructing the business from email. Include filed returns, assessments, correspondence, payroll and VAT records, transfer-pricing support, tax-residency evidence, ownership history and schedules that reconcile tax balances to the accounts.
Where a group is involved, map services, loans, IP and cash movements as well. Our guide to tax-efficient group structures explains why a holding company needs records and a real role. Cleanup after a buyer finds an issue is usually slower and more expensive than a pre-sale review.
What is a practical pre-sale timetable?
Give tax work time to change the deal, not merely describe it. A sensible sequence is a preliminary review before marketing, a confirmed structure before the letter of intent, then tax schedules and disclosure before signing. If a cross-border reorganisation is contemplated, allow for legal, accounting and authority timelines too.
- Map ownership, operations, residence and historic filings.
- Model share-sale and asset-sale routes using the actual buyer proposal.
- Identify relief conditions, withholding, indirect-tax and employment-payment risks.
- Prepare disclosure and evidence before exclusivity narrows options.
Frequently asked questions
Can a business be restructured just before sale?
Sometimes, but timing, purpose and anti-avoidance rules matter. A late restructure needs advice in every affected country before it is implemented.
Does an earn-out always receive capital treatment?
No. Its legal terms, employment link and local rules matter. Review it separately.
Is the buyer's tax preference relevant to the seller?
Yes. The buyer's preferred structure can affect price, warranties and the allocation of tax risk.
When should a seller start?
Start before marketing. That leaves room to fix records and assess alternatives.
This is general information, not legal or tax advice. Tax rules and outcomes depend on the facts and can change.
Corpenza can coordinate a pre-sale tax and compliance review across the relevant jurisdictions. Talk to the team before signing the first deal document.
