Let’s be honest: when you started as a freelancer, the scariest part wasn’t finding clients. It was thinking about the Tax Authority, Social Security, quarterly declarations… that knot in your stomach when someone mentioned “fines.”
I know that feeling well. And today I’m going to show you that the 5 biggest fears you have about accounting are actually much less scary than they seem.
1. I’ll make a mistake and they’ll fine me forever
This is the number one fear. You wake up in the middle of the night thinking: “What if I forgot to declare that invoice? What if I put the wrong amount?”
The reality: A small error on your annual income tax return can cost you just 25 euros. Yes, you read that right. Twenty-five euros.
Let’s get to the point: if you make an error on your annual income tax return that doesn’t cause harm to the State (meaning you didn’t pay less tax than you should have), the minimum fine is 25 euros - and only if you don’t voluntarily correct the situation.
Practical example: Ana, a freelance designer, forgot to include a 500-euro invoice in her annual income tax return. When she realized, she immediately corrected the return. Result? Zero fine. Why? Because she corrected it before the Tax Authority detected the error.
And even if the Tax Authority detects it first? If you pay immediately when notified, you can get massive reductions on the fine. It’s not the end of the world.
Important: The trick is to correct BEFORE you’re notified. If you discover an error, don’t panic - correct it immediately. With FIZ.co, you get the Tax Shield that covers fines up to 500 euros per declaration if there’s any error in the automatic submissions.
2. Accounting has complicated formulas I don’t understand
When someone talks about “coefficient 0.75” or “tax base,” your eyes glaze over? Normal. But let me explain this as if we were having coffee.
The reality: There are no formulas. Just simple percentages.
Under the simplified regime (what most freelancers use), it works like this:
- Earned 10,000 euros building websites? The State assumes 25% of that (2,500 euros) was expenses. You only pay taxes on the other 75% (7,500 euros).
- Sold products? The State assumes 85% was expenses. You only pay taxes on 15%.
That’s literally it. You don’t have to calculate anything - the Tax Authority system does this automatically when you file your return.
- 75% is taxable
- 25% assumed as expenses
- E.g. €10,000 → taxed on €7,500
- 15% is taxable
- 85% assumed as expenses
- E.g. €10,000 → taxed on €1,500
Practical example: João invoiced 15,000 euros in 2025 as a programmer. When he filed his annual income tax return, he just had to enter this total amount. The system automatically calculated that he’d pay taxes on 11,250 euros (75% of 15,000 euros). Zero formulas, zero headaches.
3. I need an expensive accountant
This is a classic. You think you need to pay 200 euros a month for an accountant because “this is too complicated.”
The reality: Under the simplified regime, an accountant is completely unnecessary.
Why? Because your obligations are simple:
- Issue invoices (4 fields to fill in)
- Submit the quarterly VAT declaration (if you’re not exempt)
- Submit the quarterly Social Security declaration
- File the annual income tax return once a year
Each of these things literally takes minutes. And with tools like FIZ.co, the quarterly declarations are submitted automatically - you don’t even have to remember the deadlines.
Practical example: Marta, a copywriter, was paying 150 euros/month for an accountant. She switched to FIZ.co and now the VAT and Social Security declarations are submitted automatically every 3 months. Annual savings? 1,800 euros.
4. The Tax Authority will show up at my door for an inspection
You imagine tax inspectors knocking on your door, rifling through papers, asking difficult questions…
The reality: For independent workers under the simplified regime, this almost never happens.
The Tax Authority has automatic systems that cross-reference information. If your invoices match your declarations, if you pay on time… you’re just another number in the system. You’re not interesting to them.
And even if there is an inspection? If you have everything organized (issued invoices, expense receipts), there’s no drama. Is it annoying? Yes. Is it the end of the world? No.
Practical tip: With FIZ.co’s integrated bookkeeping, you have everything in one place - income, expenses, VAT. If you ever need to show something to the Tax Authority, it’s all there, automatically organized.
5. I’m not smart enough for this
This is the saddest fear, because it’s completely false. If you can manage projects, talk to clients, deliver work on time… you can perfectly well handle your accounting.
The reality: A freelancer’s accounting is simpler than managing a project.
Think about it:
- Issuing an invoice = filling in 4 fields
- Quarterly VAT declaration = copying values from invoices
- Quarterly Social Security declaration = stating how much you invoiced
- Annual income tax return = adding up the annual total and filling in Annex B
That’s it. It’s not rocket science.
Real example: Pedro, a photographer, thought he was “terrible with numbers.” He started using FIZ.co and discovered that issuing invoices takes 30 seconds. Quarterly declarations? Submitted automatically. Income tax? The AI Tax Assistant guides him step by step. Turns out he wasn’t dumb - he just needed the right tools.
Important: The biggest mistake is accumulating months of invoices “to deal with later.” Do it right away - with FIZ.co you can even create invoices via WhatsApp while leaving a meeting.
The Truth About These Fears
All these fears have one thing in common: they seem much worse in our heads than they are in reality.
- Astronomical fines? In practice, 25 euros if you correct in time
- Complicated formulas? It’s just multiplying by a percentage
- Mandatory accountant? Unnecessary under the simplified regime
- Surprise inspections? Extremely rare for organized freelancers
- Being too dumb? If you’re reading this article, you’re already smart enough
The secret is having a system. And that’s exactly what FIZ.co is for. Free certified invoicing on the Base plan. Automatic VAT and Social Security declarations on paid plans. AI Tax Assistant for your questions. Tax Shield to protect you from fines.
It’s not magic. It’s simply the right tool for the right job.
In summary:
- Small mistakes cost little - A minimum fine can be just 25 euros, and you can avoid it completely by correcting voluntarily
- There’s no complicated math - Under the simplified regime it’s all automatic: 75% of your earnings are taxable if you provide services, 15% if you sell products
- With the right tools, it’s simple - FIZ.co submits your quarterly declarations automatically and protects you from fines with the Tax Shield
