Not every ownership change is a sale of the whole company. Many family businesses move ownership a piece at a time: shares gifted to children over several years, a sale of a stake to the next generation, or one sibling buying out another.

These transactions raise a question that surprises a lot of owners. If the company is worth $10 million, is a 30% stake worth $3 million? Usually not. It’s typically worth less, sometimes a good deal less. Understanding why can save your family real money, and prevent real arguments.

Control has value

Whoever controls a company decides who runs it, what gets paid out, whether to invest or borrow, and when to sell. A 30% owner can’t make any of those calls. They share in the results but can’t direct them.

A buyer would pay less for that position than for a proportional slice of the whole company. Valuators call the reduction a discount for lack of control.

Marketability has value too

Shares in a public company can be sold in seconds. A minority stake in a family-owned laundry can’t. There’s no ready market, few outside buyers would want it, and the operating agreement may restrict who can buy it anyway.

That difficulty in turning the stake into cash earns a second reduction, the discount for lack of marketability.

How it plays out

Here’s a simple illustration, not a guide to what your discounts would be. Say the whole company is worth $10 million on a controlling basis. A proportional 30% would be $3 million. After supported discounts for lack of control and marketability, that stake might be valued in the range of $2.0 million to $2.4 million. The actual discounts depend on the company’s facts, the governing documents, and the rights that come with the shares.

Where it matters most

Gifting shares to the next generation. Gifts of minority interests are typically valued with these discounts, so more ownership can move under the same gift and estate tax limits. The IRS reviews these discounts closely. A gift needs a qualified, well-supported appraisal to hold up.

Selling a stake to family. Discounts can make a buy-in more affordable for the next generation. They also lower what the selling owner receives. The family should decide up front whether that tradeoff fits its goals.

Buying out a partner or sibling. Here discounts can cause friction. The exiting owner sees a discounted price as unfair. The remaining owners see it as the market. Many operating and buy-sell agreements settle this in advance by stating whether discounts apply. If yours is silent, fix that before you need it.

Get the agreement and the valuation right

Three things help these transactions go smoothly. Review your operating or shareholder agreement for transfer restrictions and buyout terms. Get an independent valuation from someone who knows the industry and can support each discount. And bring your estate attorney and CPA in early, because the tax treatment drives much of the decision.

Handled well, a staged transfer keeps the company in the family and treats everyone fairly. Handled poorly, it can create the very disputes the owner was trying to avoid.