Mr Fernando retired as an engineer, but his old clients keep calling him for small projects. He’d like to say yes - it’s work he enjoys and an extra that feels good. But he’s stopped by the usual question: “if I go back to issuing receipts, do I lose my pension? Do I have to contribute to Social Security again?”.
Good news for Mr Fernando: he can work freely. The pension doesn’t disappear, and Social Security even exempts him from contributing. Where he has to pay attention is in IRS - and that’s what we’ll focus on.
The pension and the activity stack - with no cuts
A pensioner can open an activity and issue green receipts without their old-age pension being reduced or suspended. The two incomes - the pension and what you invoice - stack freely. You keep receiving the full pension and still invoice your activity.
The only caveat is legal compatibility - on a normal old-age pension there’s no problem. But there are two exceptions: if your old-age pension came from converting an absolute-invalidity pension, it doesn’t stack with work; and an early-retirement pension (under flexibilização) cannot, in its first 3 years, be combined with any work or activity - including green-receipt services - for your former employer or its group (art. 62.º of DL 187/2007); breaching this can cost you the pension for that period, plus repayment and a fine.
In Social Security: you’re exempt
Here’s the part that surprises people when they retire. Unlike an ordinary self-employed worker, a pensioner receiving an old-age pension is exempt from contributing to Social Security on the activity’s income.
In other words: Mr Fernando doesn’t pay the 21.4% an ordinary freelancer pays, nor does he have to file quarterly declarations to Social Security. The exemption is usually applied automatically when you open the activity (the system already knows you’re a pensioner), but it’s worth confirming your status on Segurança Social Direta.
In IRS: no exemption here - the incomes add up
This is the point where Mr Fernando has to be careful. In IRS there’s no exemption at all: the pension and the green receipts are declared and taxed together.
- The pension goes in as category H income (in Anexo A).
- The green receipts go in as category B (in Anexo B).
The two incomes are aggregated - added together in the same IRS return. And because IRS is progressive (the more income, the higher the rate), adding the activity to the pension can push you into a higher bracket and raise the effective rate on the total.
IRS doesn’t tax that €30,000 as-is: the pension has its own specific deduction, and the activity income is first reduced by the simplified-regime coefficient (0.75 for most services - so the €12,000 counts as €9,000). But the principle holds: the two are added together, so the year’s tax can be higher than on the pension alone. Worth knowing, so you don’t get a shock in April.
What about withholding tax?
The normal category B rules apply to green receipts. If you expect to invoice less than €15,000/year (the Article 53.º CIVA limit) and didn’t exceed that last year, you can opt for the withholding dispensation (CIRS art. 101.º-B) - it’s your choice, not automatic. If you cross €15,000 during the year, the dispensation ends the following month. And when withholding does apply, it’s the clients with organised accounts (typically companies) who deduct it; private clients never withhold.
Example - Mrs Alice, a retired teacher: she gives private lessons to individuals and invoices around €6,000 a year. She’s well below €15,000 - and since her clients are private individuals, there’s no withholding at all. She adds those €6,000 to her pension in IRS, and since she doesn’t contribute to Social Security, almost everything she invoices stays in her pocket, apart from the IRS.
- Normal old-age pension stacks with the activity, no cuts
- EXEMPT from Social Security (0%)
- No quarterly declaration to Social Security
- IRS: pension + activity add up
- Only the activity's income
- Pays 21.4% Social Security
- Files the quarterly Social Security declaration
- IRS: only the activity's income
Warning: the exemption is from Social Security, not IRS. The classic pensioner’s mistake is thinking “I don’t contribute to Social Security, so I pay little tax”. It doesn’t work like that: the green receipts add to the pension in IRS and can push you up a bracket. Before taking on a lot of work in a year, do the combined IRS maths - don’t look only at the part that’s exempt.
✅ In summary
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You can combine a normal old-age pension with green receipts without cuts to the pension. Exceptions: a pension converted from absolute invalidity doesn’t stack with work, and an early-retirement pension cannot, in its first 3 years, be combined with work (incl. green receipts) for your former employer or group (see above).
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In Social Security you’re exempt: you pay neither the 21.4% nor file the quarterly declaration, because you receive an old-age pension. But in IRS there’s no exemption - the pension (category H) and the activity (category B) add up and are taxed together, which can push you into a higher bracket. And if you invoice under €15,000/year (this year and last), you can opt for the withholding dispensation.
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With FIZ you issue the receipts and keep the activity’s income organised for the IRS return, where it joins your pension - no surprises in April. See the plans.