Updated August 7, 2026. Quick answer: a business started after 60 runs into three systems that a business started at 30 does not — the Social Security earnings test, the taxation of your benefits, and your Medicare premium two years later. None of them makes the business a bad idea. All three change the arithmetic, and two of them are invisible at the moment you earn the money. Below the three systems, this page now indexes the whole encore vertical — formation, running it, the tax layer, consulting, and what happens to the business at the end. Nothing in it carries an ask: we form no entities, sell no documents and take no commission from anyone who does.
If you are claiming before full retirement age
Earned income can temporarily reduce your Social Security while you are below full retirement age. For 2026 the annual exempt amount is $24,480, rising to $65,160 in the year you reach FRA.
The word doing the work is temporary. Benefits withheld under the earnings test are not lost — your benefit is recomputed at full retirement age to credit the months withheld. People routinely turn down work believing the money is gone. It is deferred, not confiscated.
And it applies to earned income only, which is precisely what a business generates — so this is the system most likely to bite an encore business and least likely to be mentioned when someone suggests you monetise a hobby. The tax side of the same coin: the 12.4% you pay is what makes those earnings count toward the benefit in the first place.
The one with a two-year fuse
Business income raises your income, and Medicare premiums are set from your income two years earlier — so a good year at 63 shows up as a higher premium at 65, long after the money is spent. It is a lookback, and a cliff rather than a slope: a dollar over a threshold costs the whole step.
This is the one that surprises people most, because nothing about the year you earn it tells you it is happening.
The part that is genuinely good
Self-employment income opens retirement plans with contribution room far above an IRA’s, and they can be established for a business of one: what earned income actually unlocks, solo 401(k) versus SEP-IRA for a sole proprietor, and what the contribution works out to.
That is often the strongest financial argument for an encore business, and it is available whether or not you form an entity — a sole proprietorship qualifies. Forming an LLC is a separate question with its own cost: do you need one at all, where the answer is frequently no.
The line between a business and a hobby
An activity carried on without a genuine profit motive is treated differently, and losses from an activity that is not a business are not deductible against other income. The practical version: an encore business run seriously — separate accounts, records, pricing meant to make money — looks like a business. One run for enjoyment with deductions attached does not, and the distinction is made on the facts rather than on what you call it.
If the income is small and platform-reported, start with what is actually reportable: the 1099-K threshold.
The whole encore vertical, in the order it happens
Most of what follows sells nothing, which is why almost nobody writes it. Every page below is ask-free.
1. Should there be an entity at all? Do you need an LLC (often no) · where to form it (where you live, not Delaware) · yourself, a service, or an attorney · what it costs in your state · whether to pay a registered agent.
2. Setting it up. The EIN, free from the IRS · the separate bank account, which is what makes the entity mean anything · licences and permits, three layers that the formation filing prompts none of · whether your existing cover reaches the business (usually not).
3. Running it. The honest bookkeeping minimum · paying yourself — draws, not a salary · the annual report your state does or does not require · hiring your first help.
4. The tax layer. Self-employment tax at 15.3% · estimated taxes in year one — and why year two is the trap · the home office, done honestly · deductions, and the 2026 mileage split · what the earned income unlocks.
5. If the business is consulting — the most common encore shape. The transition · going back to the company you just left · setting the rate, with the arithmetic · what the agreement has to answer · board and advisory seats.
6. Ending it. Closing an LLC properly — walking away is the most expensive way · what happens to it when you die · the wider business-owner exit.
The vocabulary, in one place
Five terms this vertical uses constantly. They live here rather than in a glossary because the business glossary does not exist yet — each is anchored so a definition can be cited directly.
Self-employment tax. The 15.3% you pay as both employer and employee — 12.4% Social Security up to the annual wage base, plus 2.9% Medicare with no ceiling. The employer-equivalent half is deductible in figuring adjusted gross income. Full page.
Owner’s draw. Money moved from the business to yourself in a disregarded entity. It is not wages and it is not a taxable event — you are taxed on the profit whether or not you take it. Full page.
Certificate of insurance (COI). Evidence of the cover you carry, which clients commonly require before signing. The requirement is contractual rather than legal. Full page.
Errors and omissions (E&O) / professional liability. Cover for financial harm caused by your professional services or advice — a different product from general liability, and not included in it. Full page.
Administrative dissolution. The state ending your entity for non-compliance — usually missed periodic reports — without ending the obligations attached to it. Which report your state requires · closing it properly instead.
We do not form LLCs, sell formation services, or take a commission from anyone who does.
Sources and limits
The 2026 earnings-test amounts ($24,480 and $65,160) are tracked in our claims register and re-checked against the annual Social Security determination, which lands in late October or early November.
Honest gap. This page maps the interactions and indexes the vertical; it does not compute any of them. The earnings-test withholding formula, the taxation of benefits, the IRMAA brackets and the hobby-loss factors each have their own rules and their own pages, and none is set out in full here.
See methodology and corrections. General information, not legal or tax advice. No advertising appears on this page and we earn nothing from it.
And if you still have an employer alongside the business: state auto-IRA programmes enrol you automatically into a Roth IRA, which carries an income limit a workplace plan does not.