Selling your business: what taxation really changes for you

Selling your business is a pivotal moment — often the most significant financially. Before signing, you need to understand how tax reduces your gain. Good news: mechanisms exist to optimise this impact. But you need to know about them and activate them in time.

You have built your business over 10, 15 or 20 years. You have offers. The deal price seems fair. But then you calculate the capital gains tax and the number drops. This is normal: without preparation, taxation easily absorbs 40 to 50% of your gain.

Yet there are levers. Some affect the tax rate. Others affect the taxable base itself. All require preparation. That is what we explore here.

01.Understanding capital gains on a business sale

The mechanism is straightforward: capital gain = sale price − net book value (assets minus liabilities). This gain is subject to income tax (IR) at 45% (including social contributions), unless you are subject to corporate tax (IS).

02.The holding-period deduction

This is one of the few mechanisms that is systematically overlooked. If you have held your business for a minimum period (at least 5 years), you benefit from a progressive deduction on the capital gain:

• 5 to 8 years of ownership: 10% deduction per year (50% total)
• From 8 years: 15% deduction per year (75% total)
• After 2 additional years (i.e. 10 years): the deduction reaches 90%

An example: you have held the business for 12 years. Your capital gain is €500k. The deduction is 90%. The taxable base falls to €50k. At 45%, the tax drops from €225k to €22.5k. The difference is enormous.

03.The retirement departure regime

If you are a sole or majority managing partner, a special mechanism exists: the retirement departure regime. Subject to conditions, it provides an additional 50% deduction on the capital gain.

• You must prove that you are actually retiring
• You must have been affiliated with the self-employed social scheme (TNS) for at least 5 years before the sale
• The buyer must be another natural person (not a company)

Combined with the holding-period deduction, this regime can bring the taxable capital gain down to less than 20% of its initial value. It is powerful.

04.Structuring the sale to optimise tax

Beyond natural mechanisms, the structure of the sale itself has a fiscal impact. For example:

• Share sale vs. asset sale: if you sell the business through a holding company, the tax regime changes fundamentally.
• Sale in instalments: receiving the price in several payments can spread the tax over multiple years.
• Debt takeover by the buyer: if the price is partly in cash and partly in liability assumption, the taxation mechanisms vary.

05.Preparing the sale well in advance

The best tax savings always come from preparation. A few months or years before the sale, you need to:

• Clean up the balance sheet (remove unnecessary assets, regularise debts)
• Verify that you meet the conditions for the retirement departure regime
• Quantify the tax impact for different sale structures
• Anticipate social charges (RSI) that are added to income tax

06.Business transfer is also a strategic project

Taxation is only one piece of the puzzle. The real question is: who takes over after you? Should you sell to an external buyer, pass the business to your children, or transfer it to your employees through a structured arrangement (FCPE, management SARL, etc.)?

Each scenario has its tax implications, but also human and strategic ones. That is why at Fifty Bees, we never treat taxation in isolation. We integrate it into a comprehensive transfer project.