Buying Back Pension Years Before a Sale: A Lever With an Expiry Date
A voluntary buy-in into the occupational pension fund (LPP/BVG) is a payment that closes the gap between the benefits already accrued and what an uninterrupted contribution history would have produced, in exchange for a full deduction from taxable income the year it is paid. The mechanism has always existed in the Swiss pension system. What changes once a business sale comes into view is the calendar it lands in, and that calendar is the part I most often see mishandled in transmission files.
The mechanism, beyond the tax checkbox
What the buy-in actually changes that year
The deduction applies to income in the year of payment, at both federal and cantonal level. It matters most when that year's income is unusually high, which is common in the two or three years before a sale: an exceptional bonus paid to retain an executive before closing, a dividend taken out to clean up the balance sheet before due diligence, or simply a strong year that inflates the owner's salary while negotiations are still open. A well-placed buy-in absorbs part of that spike instead of leaving it taxed at the top marginal rate.
Where the room to buy in comes from, and its limits
The buyable amount is not discretionary: it comes from the pension certificate issued by the fund, which states the exact gap given age, insured salary, and any buy-ins already made. It must come from own funds, never from a loan taken out for the purpose, and a buy-in exceeding the stated gap is simply rejected by the fund. In the mandates I run, the first mistake is settling on a round number, a hundred thousand francs say, before even requesting an up-to-date certificate.
A window that closes with the employment contract
The owner of an SME is, for pension purposes, an employee of their own company. The day they step out of that role, often at the sale itself or shortly after, their affiliation ends and the buy-in door closes with it. A buy-in planned for "after the sale, once income is clearer" usually arrives a year or two too late.
The three-year lock that traps misaligned sale calendars
The rule
A buy-in followed by a capital withdrawal, whether for buying property, starting self-employment, permanently leaving Switzerland, or retirement, within three years of the payment, exposes the taxpayer to a reassessment: the tax authority retroactively reclassifies the buy-in as taxable income for the year it was made, plus late-payment interest. The deduction is never final until that period has run its course.
Buy in to cut tax, then withdraw the capital less than three years later: the authority can reclassify the entire buy-in as taxable income, retroactively.
The scenario that keeps coming back in my mandates
An owner makes a substantial buy-in the year an exceptional dividend is taken out to prepare a sale. The deal closes eighteen months later, they leave the company, and their exit plan calls for withdrawing the pension in capital form to pay off a mortgage or fund a new venture. The buy-in and the withdrawal then fall within the same three-year window, and what was meant to be a tax saving turns into a back-tax bill on a sum the owner thought was already behind them.
The risk beyond the strict deadline
The three-year rule is not the only limit. Federal case law also looks at whether the sequence, buy-in followed by withdrawal, was objectively foreseeable at the time of payment, regardless of the exact number of months elapsed: a buy-in decided while a sale is already in advanced negotiation and retirement is already set can be reclassified even after the formal deadline, under the doctrine of tax avoidance. Cantonal practice varies on how strictly this gets examined, which echoes a broader point about succession timelines in Switzerland: there is no single Swiss tax calendar, only twenty-six readings of the same federal rule.
Framing the buy-in when a sale is in view
Size the actual gap before over-buying
Request an up-to-date pension certificate and have the fiduciary calculate the real tax saving against the amount locked away until retirement. A buy-in that exceeds the actual gap, or that ties up a disproportionate share of liquid wealth right before a transaction, when other cash needs can surface during negotiation, is worth revising downward.
Buy in early, well ahead of the exit
The simplest rule is also the most neglected: schedule buy-ins several years before any foreseeable capital withdrawal, not within the three years leading up to a departure that is already likely. That means anticipating the sale calendar well before negotiations open, which ties into the broader case for preparing your tax position before selling rather than reacting to it under the pressure of an offer already on the table.
What to check with the fiduciary
On a file where the buy-in-then-withdrawal sequence is hard to avoid, an advance tax ruling can secure the treatment before committing, rather than discovering the authority's position after the fact. And once the sale is done, the pension question does not stop there: the choice between an annuity and a lump sum, or a new affiliation if some activity resumes, plays out on different terms once the owner's wealth is reconstituted.
The pension buy-in remains one of the few tax levers that produce a clear, verifiable effect on an owner's tax bill ahead of a sale. It only delivers for those who place it early enough in the transmission calendar that it never crosses paths, three years later, with the date they plan to draw on their own pension.