Running a solo business in Portugal and Sweden: two systems, different trade-offs.

Last year, my accountant submitted my IRS return and I only reviewed the numbers after the fact. Several thousand euros had been added to my taxable income because I hadn't proven enough deductible expenses on the e-fatura portal. I didn't even know I needed to.

I'd been on the simplified regime for three years, operating under the assumption that the regime's built-in expense allowance meant I didn't need to worry about tracking receipts. Turns out, 15% of your gross service income has to be backed by proof. A fixed deduction or your Social Security contributions cover part of it, but above a certain income level the rest has to come from invoices classified correctly on the e-fatura system. Miss that threshold, and the shortfall gets added to your taxable income.

This wasn't my accountant's fault. It was a gap in how we communicated. There was no shared dashboard, no checklist of what I needed to do before filing season. The information existed on both sides but there was no tool connecting us. I never corrected the return. Resubmitting would have taken hours I could have spent invoicing clients. So I paid the extra tax and moved on.

That experience got me thinking about the differences between running a business here and in Sweden, where I'm from. I've started and run businesses in Sweden, Germany, and now Portugal. Some stayed small. Others grew into multi-country operations across the Nordics. In every case, the ability to understand your own numbers and control costs was what separated the businesses that worked from the ones that didn't.

Not in a "one country is better" way. Both systems have real strengths and blind spots. But they solve the same problem from opposite directions, and the contrast is worth understanding if you're building a business in either country.

Where Portugal gets it right

Portugal does more to encourage people to start businesses than most of Europe. Definitely more than Sweden.

When you register as a trabalhador independente (independent worker) for the first time, you don't start contributing to Social Security until the first day of the 12th month after your start date, so roughly a year passes before contributions begin. For services, the share of your income that gets taxed is cut by 50% in the calendar year you start and by 25% in the next one (goods sales get no cut). You lose a year's cut if you also have employment or pension income that year, and you get none if you closed any activity in the previous five years. If you're 35 or younger, nobody claims you as a dependant and you meet a few other conditions, a separate regime (IRS Jovem) exempts all of your first year of work income from IRS, up to an annual cap, and a shrinking share in later years, for up to ten years of income (it stops at age 36). The exempt income still counts when the rate on the rest of your income is set.

The simplified regime itself is a genuine advantage. The tax authority taxes only a fixed share of your income: 75% for the professions specifically listed in the Article 151 table, 35% for other services. The rest is assumed to be expenses, though part of that assumption has to be backed by proof (more on that below). You don't need to maintain full double-entry bookkeeping. No requirement to hire a certified accountant. For a solo entrepreneur earning under €200,000.00 per year, the financial barrier to starting is low, and for service providers the first two years are actively subsidized.

Sweden works differently. A sole trader (enskild firma) is taxed on actual profit: income minus real costs (inkomstskattelagen, chapter 14, section 21), with no deemed share of costs. Social contributions (egenavgifter) are charged on that profit from the first year (socialavgiftslagen, chapter 3). The one general reduction in the law (lag 2023:748) applies to every sole trader under 67 with enough profit, and nothing in it depends on how new the business is. The one start-up relief helps only a business that loses money: a loss in the start year or the four years after can be deducted from other income, up to 100,000 kronor a year, unless you ran a similar business in the five years before (inkomstskattelagen, chapter 62, section 3). If you make a profit, you register your business and start paying.

Where Sweden gets it right

Sweden's advantage isn't in incentives. It's in the daily experience of running a business once you've started.

The biggest difference is the annual tax return. In Sweden, your deklaration arrives with part of it already filled in by Skatteverket (the tax authority). If you have nothing to change or add, you just approve it, in Skatteverket's e-service or by SMS or phone (Skatteverket: Så här deklarerar du). The system works for you. A sole trader gets less of this: business owners file an attachment, which rules out the SMS and phone route, although the e-service usually creates the attachment for you.

In Portugal, you file actively. You validate expenses on the e-fatura portal. You submit quarterly Social Security declarations. A pre-filled automatic IRS return (IRS Automático) exists, but it covers only a narrow group, and most freelancers don't qualify, so you usually do your annual IRS return yourself. The Portal das Finanças is functional and the Chave Móvel Digital authentication works well, but the process asks more of you.

This year will be my first time doing my own Portuguese declaration from start to finish. I'm looking forward to it, actually. I'll be in control of what gets submitted. But the contrast with tapping "approve" on my phone in Sweden is real.

The other place Sweden shines is small business software. Fortnox and Bokio, the two dominant platforms, automate bookkeeping to the point where most sole traders rarely think about accounting. You invoice through the software, email or photograph your receipts, and the system categorizes and books them. Since 1 July 2024, Swedish law lets you throw away the paper receipt once it is scanned, as long as the transfer carries no risk of the information changing or disappearing (bokföringslagen, chapter 7, section 6, as amended by SFS 2024:342). Norway's bookkeeping regulation allowed paper records to be replaced by electronic copies years earlier (bokføringsforskriften § 7-2), so even within the Nordics there's variation. But the shared direction is the same: make admin disappear into the software.

The assumed expenses catch

The simplified regime's expense deduction illustrates how Portugal's system can be generous and confusing at the same time.

The idea is elegant: assume a fixed share of your income is business expenses, and don't make freelancers keep detailed books. In a specifically listed profession only 75% of what you invoice is taxed. It sounds like a deduction you get for free.

Part of it isn't free. You need documented expenses worth 15% of your gross service income, and any shortfall is added to your taxable income. Some of that is covered for you: either a fixed specific deduction of about €4,587.09 (2026) or your Social Security contributions up to 10% of your gross, whichever is larger. Contributions above that 10% line aren't wasted: they're deducted from your net income separately. But above a certain income level the fixed amount no longer covers the 15%, and the rest has to come from real expenses.

So you end up tracking expenses anyway. A Portuguese coworking space needs your NIF on its invoice, and that invoice needs to appear correctly on e-fatura. A foreign software subscription never reaches e-fatura at all: an EU one goes on your return as an intra-EU purchase, and whether a US one counts is still an open question. The deduction is real and valuable. It's just not as automatic as it sounds when you first hear about it.

Nobody explained this to me when I started. I don't think it's explained well to most people. You find out when the numbers on your tax return don't match what you expected.

Two political traditions, two approaches

Sweden and Portugal are more politically similar than you'd think. Both countries had long stretches of social-democratic governance. Both have strong labor protections and a genuine belief that the state should provide a safety net.

The difference is what happened in Sweden in the early 1990s. A severe financial crisis forced a set of reforms, supported by both left and right, that combined the social safety net with a strong market focus. The Social Democrats didn't resist this. They participated. The result, three decades later, is a country where the state takes care of a lot (healthcare, parental leave, pensions) but designs business administration to be as frictionless as possible.

Portugal's political history doesn't have that same crisis-driven consensus moment around business admin. But Portugal has its own strengths: the willingness to create real financial incentives for new entrepreneurs, a simplified tax regime that genuinely reduces complexity for small businesses, and a digital infrastructure (Portal das Finanças, e-fatura, Chave Móvel Digital) that works as a solid foundation.

Every country has its quirks. I ran a business in Germany for eight years and can confirm that German bureaucracy is its own special experience. Sweden requires all businesses to keep proper books, even sole traders (bokföringslagen, chapter 2, section 6). The Nordic social model means high tax rates across the board. And Swedish bureaucracy has its own frustrations. Ask anyone who's dealt with Bolagsverket (the Companies Registration Office) about processing times, or tried to navigate the rules around employer contributions (arbetsgivaravgifter) for the first time.

Growing from solo to company

One area where I notice the gap most is the transition from solo entrepreneur to a formal company. In Portugal, the jump from the simplified regime to an LDA (Sociedade por Quotas, roughly equivalent to a limited company) is steep. You move from doing your own admin to needing organized accounting (contabilidade organizada) and a certified accountant. It's a different world.

I hear from both expats and Portuguese entrepreneurs that it works fine if you let the accountant handle everything. Send them your receipts and invoices, they take care of the rest. And for many people that's the right setup. But having run businesses in three countries and scaled operations across the Nordics, I know that staying close to the numbers is what keeps a business healthy. You can't control costs you can't see. You can't make good decisions from quarterly reports you don't fully understand.

I'd prefer a model where I can follow along in real time and have the accountant review and advise rather than operate in a silo. The issue isn't accountant quality. It's that the tools for transparent collaboration between entrepreneurs and their accountants barely exist.

In Sweden, a private limited company (aktiebolag) below the size thresholds can state in its articles that it has no auditor (aktiebolagslagen, chapter 9, section 1). The accounting software handles most compliance. You can run a proper limited company yourself and bring in a professional only when you need guidance. It scales with you.

I haven't made the jump to a Portuguese company yet. I might be surprised when I do. But the perception from the outside, based on conversations with people who've done it, is that there's a missing middle ground. Software that lets an entrepreneur stay informed and in control while giving their accountant the structured data they need to do their job efficiently. Not replacing the accountant. Connecting both sides.

What each could learn

If I could take the best of both systems:

From Portugal: the simplified regime's financial incentives. Sweden's start-up relief only helps a business that is losing money. Sweden should look at how first-year benefits and assumed expense deductions lower the barrier for new entrepreneurs who are already earning. Not every small business needs the full weight of the tax system from day one.

From Sweden: the philosophy that admin should be the system's problem, not the business owner's. Pre-fill returns for everyone, not just a narrow group. Let software handle compliance automatically. Make the default path the easy path.

Both countries want small businesses to succeed. Portugal shows it with incentives. Sweden shows it with infrastructure. The ideal is both.

One more place where Portugal is further along than most expats realise: going paperless. I mentioned Sweden's 2024 scan-and-bin rule and Norway's earlier adoption above. Portugal has allowed the same since 2019, under Decreto-Lei 28/2019. The 10-year invoice retention rule still applies, but you do not need a paper box. Scan into an archive that keeps the files intact, legible and traceable, keep a backup somewhere separate, and discard the originals (for a supplier invoice you deduct VAT on, only after you've made the deduction). The full mechanics are in how long do you need to keep invoices in Portugal, and can you go paperless?

If you're a solo entrepreneur in Portugal navigating the admin side, our tax calculator shows you what you'll actually owe in your first three years, and the VAT guide walks you through which rate and exemption code applies to your situation.