How long could your family last with the estate frozen?
Inventário is the formal process of surveying what the person left, paying what they owed, collecting the tax and transferring the remainder to the heirs. Until it ends, the assets exist, but they barely move: as a rule you can't safely sell a property, operate an account or make decisions at the company without authorization. When the heirs are adults, legally capable, in agreement and there is no will, the extrajudicial route, by deed at a notary's office, is usually available and the path tends to be shorter. When there is a minor, an incapacitated person, a dispute or doubt about what belongs to whom, it goes to the courts, and the timeline stops depending on the family. The biggest cost is rarely the fee: it is the time the estate sits idle and the relationship between siblings turns sour. Have you ever done that calculation in months, not in reais?
Where would the money for the tax come from?
ITCMD is the state tax levied on inheritance and on gifts. State-level means the rate and the rules vary from state to state, within a national ceiling, and can change by law before you need them. There is no "Brazilian" rate: there is the one in your state, on the date of the event, which is why this page cites no number at all. It is paid in cash, normally before the asset is released. If your entire estate is in real estate, land or working capital, who sells what, and at what price, to pay that bill? Succession planning is as much a matter of cash as of structure. The rule currently in force is something your lawyer and your accountant confirm.
If twenty assets became one, who would decide for it?
A family holding is a company created to own the family's assets: real estate, stakes in other companies, sometimes investments. Instead of twenty assets in one person's name, there is one: the holding's shares (quotas). Two real gains follow from there. Governance: the articles of association and a shareholders' agreement define who decides, who can sell, what happens if an heir wants to leave, how a tie is resolved. Transfer during your lifetime: the estate can be donated in shares, often with the father and mother keeping the usufruct, that is, they continue to be in charge and to receive the income for as long as they live. What you gain is predictability: the rules were written by someone who was alive, lucid and present. Today, who would write yours?
Who told you a holding eliminates tax?
Donating shares during your lifetime is normally also a taxable event for ITCMD: in many cases you bring the tax forward, you don't eliminate it. Contributing real estate to the company involves a valuation, ITBI (the municipal property transfer tax) in certain situations, and an effect on capital gains when the asset is sold later; each case has its own design and its own cost. A holding also doesn't protect against debt you already have: a structure built to shield a known creditor tends to be undone in court. And a holding doesn't fix a family: if the siblings don't speak to each other, it only moves the fight from the probate court to the shareholders' meeting. Before asking "holding or not", it is worth asking: is the problem I want to solve one of tax, governance, liquidity or conversation?