Papa solopreneur
Solopreneur taxes in France: what nobody actually explains
August 24, 2026 · 10 min read
In short — The solopreneur tax system in France isn’t unfair by accident: it’s built for businesses with employees and balance sheets, not for individuals building alone. Choosing the right structure at the right time and automating your bookkeeping can make a difference of several thousand euros a year — with zero grey areas.
You leave employment, launch your activity, and tell yourself you’re finally going to “keep what you earn.” Two years later, you discover that URSSAF has clawed back in a regularisation payment exactly what you’d set aside to invest in your next product. This isn’t an edge case. It’s the norm for the majority of French solopreneurs who didn’t take the time to understand the tax mechanics before jumping in.
This isn’t an accountant’s article. It’s written by someone who has been building solo from La Réunion since 2008, who made their own mistakes, and who eventually started treating taxation as a system to understand — not a fate to endure.
The myth of fiscal freedom: what no one tells you before you start
The implicit promise of the solopreneur life is total independence. No boss, no investors, no HR department. But there’s a silent shareholder that nobody mentions in those bootstrapping threads: the French state.
As an employee, you never saw the employer contributions. They existed — roughly 42–45% of your gross salary went to social charges — but they were invisible. On your own, you see all of them. And they sting.
The numbers: on a micro-enterprise providing services, you pay around 21–24% in social contributions on your gross revenue. Not on your profit. Not on what you keep after expenses. On what you invoice. If you have significant real costs — software, hardware, travel — you’re paying contributions on money you never actually had.
Then comes income tax. The micro-enterprise flat-rate deduction (50% for BIC services, 34% for BNC) is supposed to represent your costs. If your real costs are lower, great. If they’re higher — and they often are for a developer or consultant who invests in their tools — you’re paying income tax on an inflated base.
The concrete result: a solopreneur invoicing €70,000 on a service micro-enterprise can end up with a combined rate (social charges + income tax) exceeding 40% of revenue. That’s less than €42,000 net before paying their actual professional expenses.
This isn’t bad faith from the administration. It’s simply that the French tax system was designed for companies with employees, balance sheets, and depreciation schedules. The solopreneur is a poorly calibrated tax object within that framework.
The good news: there are levers. But they require choosing the right structure, at the right time, with your eyes open.
A blunt comparison of structures: micro, SASU, EURL by revenue level
There’s no universal structure. There’s the one that fits your situation, your revenue level, and your trajectory. Here’s how to decide.
Micro-enterprise: relevant up to around €40,000 in revenue
The micro is unbeatable on one point: simplicity. No formal bookkeeping, monthly or quarterly declarations done in minutes, no balance sheet. If you’re starting out, testing a product, or have few real costs, it’s the right starting point.
The limits come quickly. Beyond €40,000–50,000 in service revenue, the flat-rate deduction no longer covers your real costs, and you start paying income tax on thin air. You also cross the VAT exemption threshold (€36,800 in 2025 for service activities) — meaning you must charge VAT, collect it, and file returns. The micro loses much of its simplicity advantage at that point.
EURL taxed at IS: the pivot to consider between €50,000 and €100,000 in revenue
The EURL (single-member limited liability company) taxed at corporate rate is often the structure that makes the most sense for a growing solopreneur. You pay yourself a manager’s salary (subject to TNS social charges, around 40–45% on net pay) and can distribute the rest as dividends, subject to social levies (17.2%) and either income tax or the flat tax (PFU, 30%).
The advantage: you control your contribution base. If you pay yourself €30,000 and leave €20,000 in profit inside the company, you only pay social charges on the €30,000. The company pays corporate tax (15% up to €42,500 in profit under the SME reduced rate). You optimise.
The downside: real bookkeeping is mandatory. Balance sheet, income statement, annual filing. An accountant becomes almost essential, which runs €1,500–3,000 per year depending on the provider.
SASU: relevant if you’re targeting growth or future hiring
The SASU (single-member simplified joint-stock company) is often pitched as “the startup structure.” For a solo operator, it has one specific advantage: the SASU president is classified as an assimilated employee. Social charges are higher than for a TNS manager (roughly 75–80% on net salary vs 40–45% for TNS), but you benefit from the general social security scheme, including unemployment rights under certain conditions.
For a solopreneur who wants maximum social protection and is considering raising funds or bringing in partners, the SASU makes sense. For someone optimising net margin while working solo, the EURL at IS is generally more efficient.
Quick decision table:
| Situation | Recommended structure |
|---|---|
| Starting out, testing, revenue < €40,000 | Micro-enterprise |
| Revenue €40,000–100,000, significant real costs | EURL at IS |
| Revenue > €100,000, or hiring planned | SASU or EURL depending on desired social protection |
| Regulated liberal profession | Check profession-specific constraints |
⚠️ These thresholds are reference points, not absolute rules. Your personal situation — spouse’s income, assets, succession plans — can shift the calculation. A one-off meeting with an accountant for €200–400 costs less than a bad decision locked in for five years.
The five most common tax mistakes solopreneurs make
These aren’t theoretical. They come up constantly in conversations between freelancers.
1. Not provisioning social charges from the very first invoice
The micro-enterprise collects contributions at declaration time. If you declare quarterly and set nothing aside, you arrive at payment day with an empty account. Simple rule: the moment money comes in, transfer 25% to a dedicated account. Not 20%, not “I’ll sort it later.” 25%, automatically.
2. Confusing revenue with income
On a micro, some solopreneurs run their business on gross revenue without mentally deducting charges and income tax. They feel financially comfortable and spend or invest accordingly. The year-end URSSAF regularisation hits like a truck. Always calculate your estimated available income — not your revenue.
3. Missing the VAT threshold
The VAT exemption threshold is €36,800 for service activities (2025). If you exceed it mid-year, you must charge VAT from the first day of the month you crossed it. Many solopreneurs find out after the fact and end up having to remit VAT they never collected on past invoices. Watch this threshold in real time.
4. Skipping social protection in the name of “saving money”
As a TNS (self-employed worker), health coverage is decent but supplementary pension is weak. Many solopreneurs don’t take out supplementary income protection or a PER (retirement savings plan), thinking “it can wait.” Yet PER contributions are deductible from taxable income — a legal, direct tax optimisation that’s chronically underused.
5. Changing structure too late (or too early)
Staying on a micro beyond €60,000–70,000 in service revenue usually means overpaying. Switching to a SASU or EURL too early means bearing bookkeeping and admin costs that aren’t yet justified by the savings. The right moment to switch is different for everyone, but there’s an optimal window — generally around €50,000–60,000 in annual service revenue — where the tax gain starts to outweigh the cost of the structure.
How to automate your bookkeeping with AI so you stop thinking about it
Bookkeeping is the task solopreneurs hate most. Not because it’s hard, but because it’s repetitive, anxiety-inducing, and time-consuming. That’s exactly the kind of mental load AI can absorb.
The goal isn’t to “do more.” It’s to stop thinking about it.
What AI already handles well today:
- Automatic categorisation of bank transactions (tools like Pennylane, Indy, or Notion + banking API integrations)
- Invoice generation from a template and a client brief
- Declaration reminders (monthly or quarterly VAT, DSI, URSSAF contributions)
- Bank reconciliation: verifying that every invoice issued matches a payment received
- Generating a monthly dashboard: revenue, charges, estimated available income, VAT to remit
What AI doesn’t replace:
Judgement on structural decisions. Changing legal status, deciding on your pay level in an EURL, choosing between dividends and salary, timing a PER — these decisions require a reading of your overall situation that no automated tool can do alone. AI carries the daily load. You keep the judgement on the decisions that matter.
A minimal working setup:
- A dedicated professional bank account (mandatory for companies, strongly recommended for micro)
- An invoicing tool with payment tracking (Pennylane, Freebe, or even a well-built Notion)
- An automation rule: as soon as a transaction comes in, it’s categorised and the provision transfer (25% for estimated charges + income tax) is triggered
- An auto-generated monthly dashboard — 10 minutes of review, no more
- An accountant for annual decisions and major changes of direction
This setup isn’t expensive. Pennylane for solopreneurs runs around €50–80 per month. Freebe is cheaper. An online accountant for the annual filing side can come down to €1,200–1,500 per year. That’s the cost of one billed day of work — and it buys back dozens of hours of bookkeeping anxiety.
The real value isn’t in the euros saved on accounting. It’s in the attention recovered for building, selling, and iterating on your products.
What it actually changes to treat taxation as a system
Solopreneur taxation in France isn’t simple. It’s not insurmountable either. It needs to be treated like any other technical system: understand the rules, choose the right architecture from the start, automate what can be automated, and keep your attention for the decisions that can’t be delegated.
A solopreneur who actively manages their tax situation — right structure, automatic provisions, monthly tracking, an accountant for annual decisions — often recovers several thousand euros a year compared to someone who just goes with the default. No grey areas, no exotic schemes. Just understanding the rules and applying them.
It’s exactly the same logic as with code or distribution: apparent complexity often hides simple levers, accessible to anyone who takes the time to understand them.
If you want to go deeper on the numbers that define the solopreneur economy in France and internationally, the solopreneur & AI 2026 statistics roundup compiles the authoritative sourced data on the subject.
And if you have doubts about the technical or commercial health of what you’re building, the SEK audit is built for that: an external, concrete, no-bullshit perspective.
Sébastien de Bollivier has been a freelance developer since 2008, building solo from La Réunion. He creates AI-powered products on his own. His full profile is at sebastiendebollivier.com.
Frequently asked questions
Which legal structure should you choose when starting out solo in France?
Below €40,000 in annual revenue, the micro-enterprise is still the simplest starting point. Beyond that — especially if you're targeting €60,000 or more — an EURL taxed at corporate rate (IS) or a SASU lets you control your own pay and reduce your social contribution base. The right choice depends on your income level, your tolerance for admin, and your wealth strategy.
What are the real charges for a solopreneur on a micro-enterprise?
On a micro-enterprise (BIC or BNC service activity), social contribution rates run around 21–24% of gross revenue — not profit. Not what you keep after expenses. What you invoice. On top of that comes income tax. Without a flat-rate deduction that actually covers your real costs, your effective marginal rate can exceed 50% once you hit the higher income tax brackets.
Can AI really handle my solopreneur bookkeeping?
AI can automate transaction categorisation, invoice generation, VAT reminders, and declaration prep. It doesn't replace an accountant for structural decisions — changing legal status, dividends, wealth planning — but it removes most of the daily mental load of bookkeeping.
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