The Liquidity Event Playbook: What to Do in the First 90 Days After Selling Your Business

The window that matters more than people realise

The first ninety days after a business sale are the most important — and the most under-prepared for — period in a founder's financial life. Wires land. Advisers appear. Friends suggest things. Family expectations shift. And in the middle of it sits a person who, until recently, was running a company and is now expected to run a fortune. The skills do not transfer automatically.

What separates founders who compound their wealth from those who quietly erode it is rarely investment performance. It is the quality of the structural decisions made in the first three months — residency, holding entities, tax positioning, liquidity layering, and the architecture of the people they let into their financial life.

Day 1 to 14: do almost nothing

The single most valuable instinct in the first two weeks is restraint. The proceeds should sit in a high-grade money market or treasury position at a credible custodian. Not deployed. Not allocated. Not distributed across asset managers chasing the mandate. Sit on it.

The reason is structural. Almost every consequential decision — where to be tax resident, which holding structure to use, which jurisdiction the proceeds should ultimately sit in, which currency exposures matter — must be made before capital is committed. Once the wire moves into a brokerage account in the wrong jurisdiction, you are unwinding it under tax friction for years.

Day 14 to 45: structure before strategy

This is the window for the team that will run the household to be assembled. Not investment managers. Not yet. The first hires are tax counsel in every jurisdiction the household touches, an estate planning specialist familiar with cross-border families, and a single coordinating relationship who holds the whole brief.

Most founders skip this step. They go straight to investment allocation because that is the conversation everyone wants to have with them. Private banks call. Family friends introduce hedge fund managers. The pressure to "put the money to work" is constant. Resist it. The structural decisions made now — trust architecture, residency planning, holding company jurisdiction — will determine the after-tax return on every pound for the next thirty years. Allocation decisions can be made in month three. Structure cannot be retrofitted.

Day 45 to 90: build the architecture

By month two, the household structure should be taking shape. A clear picture of which entity holds which assets, where the family is tax resident, what the next-generation succession plan looks like, and how income, capital and lifestyle expenditure flow through the system. This is the moment to set the long-term capital plan — not specific investments yet, but the framework: liquidity needs, return targets, risk tolerance, illiquidity capacity.

Only at the end of month three should significant capital deployment begin. By that point, the structural foundations are in place, the team is operational, and decisions can be made from a position of clarity rather than urgency.

What goes wrong without a coordinated approach

The most common failure pattern is fragmentation. The founder ends up with five advisers, each optimising for their own slice of the picture, and no one accountable for the whole. The investment manager builds a portfolio without reference to the tax position. The tax adviser optimises for the current jurisdiction without anticipating the planned move. The lawyer drafts trust documents that do not align with the investment mandate. Six months in, the household is operating, but it is operating against itself.

A coordinated family office model — whether traditional or fractional — exists precisely to prevent this. One brief. One coordinating relationship. Every decision considered against the whole.

How Atrium engages with post-liquidity founders

Atrium membership for a founder in the immediate aftermath of a sale begins with a structural review before any allocation work. The first ninety days are spent building the household architecture, coordinating the existing advisers, and giving the founder the time and space to think clearly. The investment work begins when the foundations are right — not before.