What a poorly drafted shareholders' agreement costs you when you sell

Having a lawyer review a shareholders' agreement costs, in Switzerland, between CHF 3,000 and 8,000 for a straightforward SME structure, more if several share classes or several family branches complicate the text. Finding out, at the moment of a sale, that a buy-back clause forgotten for fifteen years pegs the share price to book value usually costs ten to twenty times more. That gap, between the price of a review and the price of a neglect, is worth stating in figures before anything else starts in a transmission project.

A shareholders' agreement is the document most owners sign once, when founding the company or bringing in a partner, then file away. It gets reopened, generally, only when an event forces it: a dispute between shareholders, a death, or a sale. That last case is the most expensive one, because the document no longer organizes a living collaboration, it directly decides how much money changes hands.

The cost of reviewing it, before the problem exists

A preventive review, two or three years ahead of a planned transmission, usually amounts to a consistency check: do the exit clauses still match the actual shareholder base, does the valuation method reflect a market price or an arbitrary figure set at incorporation, does the non-compete clause survive a change of control. Depending on complexity, that work costs between CHF 3,000 and 8,000. A full rewrite, because the structure has evolved since drafting (new shareholders, different share classes, an intermediate holding company), can reach CHF 15,000, rarely more for a mid-sized SME.

In the mandates I run, the preventive review is almost always the least discussed budget line of a transmission project. It is also, almost systematically, the one that would have avoided the items below.

What a book-value buy-back clause costs

This is the most expensive item, and the most common one in Swiss SMEs older than twenty years. Many agreements drafted in the 1990s or 2000s set a buy-back price, when a shareholder exits, based on the book value of the shares, a simple method at the time, never updated since. Book value in a profitable SME structurally diverges from market value, sometimes by a factor of three to six. On a company valued at CHF 4 million whose book value does not exceed CHF 800,000, the clause, if applied literally to a minority shareholder's exit or to a buy-back by a deceased founder's heirs, strips the departing party of several hundred thousand francs. This is not a theoretical case: it is the clause most often cited by transmission lawyers as the source of disputes.

Picture three siblings who co-own an engineering firm, where the agreement their father signed in 1998 still sets the exit price at book value. The day one of them wants to sell their stake to a third party to fund their own transmission, the other two invoke the clause to buy it back at a third of what an outside buyer would offer. Nothing illegal about the clause, it was signed knowingly twenty-eight years ago; but its cost, for the one leaving, equals exactly the gap between the two valuations.

What a badly calibrated pre-emption clause costs

A right of first refusal, giving other shareholders priority to buy shares before they go to a third party, protects stable governance. Badly calibrated, it costs two distinct things. First, a delay: a pre-emption right whose exercise window is not capped ("within a reasonable time" instead of a set number of days) can freeze a transaction for months, while the other shareholders decide, or negotiate their own exit in parallel. Second, a dispute, if the reference price for the pre-emption is not clearly defined: settling a disagreement over that price before a Swiss arbitral or civil court typically costs between CHF 20,000 and 80,000 in legal and expert fees, not counting the time the procedure takes away from the sale itself. A buyer who sees a transaction slowed by a shareholder dispute often revises the offer down, or walks away.

What a non-compete clause, too broad or too narrow, costs

A non-compete clause too broad, copied from a generic template rather than drafted for the company's actual activity, can bar a departing shareholder from working in their own sector for several years across all of Switzerland, a restriction that rarely settles amicably once contested. Conversely, a clause too narrow or absent leaves a shareholder who sells their stake free to set up a competing structure the next day, a risk that selling to a competitor makes especially concrete: the buyer acquiring the company wants assurance that the seller will not rebuild, six months later, a similar activity with the same clients. Negotiating that assurance under time pressure, in the final weeks of a sale process, usually costs a discount on the price, because the buyer knows it is negotiating from a position of strength.

The cost table, item by item

These ranges remain orders of magnitude, not quotes: they vary with company size, canton, and the complexity of the shareholder base. What they show, taken together, is that the most expensive line item in a shareholders' agreement is almost never the lawyer's fee for drafting it. It is the silence of the shareholder who never rereads it.

A family office buying an SME to hold across generations will, in fact, almost systematically ask to review the shareholders' agreement before even entering formal legal due diligence. A document no shareholder has reopened in fifteen years often says more about the state of governance than an up-to-date balance sheet.