Modelo 303 with no activity: how to file it when you haven't invoiced
There are quarters when not a single invoice comes in. A bad month that drags on, a lull between projects, the start of an activity where you still haven’t closed your first client. And when the day comes to file your modelo 303 (the quarterly VAT return), the question is unavoidable: if I haven’t invoiced anything, do I still have to file it?
The short answer: yes. As long as you’re registered in the census of economic activities (modelo 036 or 037), the obligation to file the modelo 303 exists every quarter, with or without income.
The important answer: not having invoiced does not mean you should mark it “no activity”. And confusing one thing with the other can cost you money.
The obligation doesn’t depend on your income
Being registered as an autónomo (self-employed worker) implies a series of formal obligations with the Agencia Tributaria (the Spanish tax authority). One of them is filing the modelo 303 every quarter. It doesn’t matter whether you’ve invoiced a hundred thousand euros or zero. The obligation exists as long as the census registration exists.
There are very specific exceptions: autónomos under the recargo de equivalencia regime (a simplified VAT scheme for retailers) who don’t carry out intra-community transactions, or those under módulos (objective estimation, a flat-rate scheme) with certain conditions. For the vast majority of autónomos under estimación directa (direct estimation, taxed on actual income minus expenses), the rule is clear: one quarter, one return.
If you deregister from the census mid-year, you no longer file the quarters after the deregistration. But while you’re registered, you have to.
This article uses the modelo 303 of the common territory. The obligation to file the “no activity” quarter applies just the same under the regional (foral) regimes, but with their own form: in the Basque Country it’s also the 303 (deadline until the 25th, with the fourth quarter folded into the annual summary, modelo 390), and in Navarre it’s the modelo F-69 filed with the regional tax authority. You have the deadline detail by territory in the quarterly VAT guide.
What “no activity” really means
The modelo 303 has a specific box to declare that there was no activity in the quarter. It’s called “Sin actividad” (no activity) and you check it on the first page of the form.
Checking it has a concrete meaning: you’ve had no transaction subject to VAT in the period. No income, no deductible expenses with VAT. Nothing. The quarter has been a complete fiscal desert.
And here’s the trap. Many autónomos interpret “no activity” as “I haven’t invoiced” and check the box without thinking. But not having invoiced is not the same as not having had economic activity.
The mistake that costs you VAT
Think about it for a moment. This quarter you haven’t issued a single invoice. But you’ve kept paying for your hosting. You’ve paid the professional mobile phone bill. You’ve renewed your design software subscription. You’ve paid for the coworking space.
All those expenses carry VAT. And that VAT is deductible.
If you check the “no activity” box, you’re declaring that you’ve had no transactions. No income, no expenses. You’re giving up the right to deduct the input VAT on those expenses. And that VAT you don’t deduct now doesn’t disappear: it’s lost.
A concrete example: an autónomo who, in a quarter with no income, has paid 150 euros for hosting (with 31.50 euros of VAT), 50 euros for software (10.50 euros of VAT), 200 euros for coworking (42 euros of VAT) and 40 euros for a professional phone (8.40 euros of VAT). In total, 92.40 euros of input VAT that could be deducted.
If they check “no activity”, those 92.40 euros evaporate. If they file the return correctly, with expenses only, the result comes out negative: -92.40 euros. That balance is left to be offset in the following quarters, reducing what they’ll pay when income returns.
When marking “no activity” is actually correct
The “no activity” box is correct in one very specific case: when you genuinely had absolutely no transactions in the quarter. Not a single invoice issued, no professional expense with VAT, no intra-community transaction. Nothing.
In practice, this is less common than it seems. If you have any recurring expense linked to your activity –the autónomo Social Security contribution doesn’t count because it’s VAT-exempt, but practically everything else does– the quarter has not been “no activity” in the fiscal sense of the term.
Before checking that box, review whether you’ve had any professional expense with VAT in the period. If the answer is yes, don’t check it.
How to file the 303 with expenses only (negative result)
If you have expenses with deductible VAT but haven’t issued any invoices, the process is the same as when you file a normal 303. The difference is that the output VAT section stays at zero.
The step-by-step summary on the electronic portal:
1. Log in to the Agencia Tributaria’s electronic portal with a digital certificate, DNIe or Cl@ve PIN.
2. Go to “Impuestos y tasas” (Taxes and fees) and select the modelo 303. Choose the quarter and the tax year.
3. Do not check the “Sin actividad” (no activity) box.
4. In the output VAT section (boxes 01-09), leave everything at zero. You haven’t issued any invoices, so there’s no output VAT.
5. In the deductible VAT section (boxes 28-29 and following), enter the taxable base and the VAT of your deductible expenses, grouped by tax rate.
6. The result of the settlement (box 46) will come out negative. That’s your VAT to be offset.
7. Indicate that the result is “to be offset” (not “to be refunded”, unless it’s the fourth quarter and you want to request a refund).
8. Sign and file.
There’s no payment direct debit because there’s nothing to pay. The return is simply recorded with that negative balance in your favour.
What happens if you don’t file
Not filing the modelo 303 when you’re required to do so is a tax offence. Article 198 of the Ley General Tributaria (the General Tax Law) sets out penalties for the non-filing of informational returns or self-assessments without economic harm.
The usual fine ranges between 100 and 200 euros per unfiled return. If the return was “to be paid” and you don’t file it, the penalty is higher because there’s economic harm to the Agencia Tributaria.
Even when the result is zero or negative, non-filing triggers a penalty. It’s not a serious penalty, but it’s entirely avoidable. Filing a 303 with no activity or with expenses only takes less than ten minutes if you have the data at hand. You can check the result with the quarterly VAT calculator before logging in to the electronic portal.
If the deadline has already passed, it’s best to file the late return as soon as possible. The less time passes, the lower the surcharge.
The simple rule
Before checking “no activity” on the modelo 303, ask yourself a single question: this quarter, have I paid any professional invoice with VAT?
If the answer is yes, don’t check that box. File the return with your deductible expenses, even if you’ve had no income. The result will come out negative and that VAT will be left in your favour to offset in the future.
If the answer is no –not a single professional invoice with VAT– then yes: check “no activity” and file.
It’s a simple rule that prevents you from losing money quarter after quarter.
How does Cuéntamo help with this?
The trouble with quarters without income is exactly this: since no money comes in, it’s easy to assume there’s nothing to declare and check “no activity” without looking. In Cuéntamo, the expenses you’ve been recording are already there, so at a glance you can see whether you incurred any input VAT during the quarter. If you did, the self-employed module calculates form 303 even when it comes out at zero or to offset, with its breakdown by VAT rate, and that balance in your favour is carried over to the next quarter.
In other words: you don’t have to guess whether to tick the no-activity box. The numbers tell you whether you have deductible VAT you’d lose by ticking it. If you want to see how the quarterly settlement is worked out from start to finish, we break it down in how to calculate quarterly VAT without a gestoría.
And when a quarter comes out to offset, what happens next is covered in the article on VAT to offset from previous quarters: how it’s carried forward until it’s absorbed.
Frequently asked questions
Do I have to file the modelo 303 even if I haven’t invoiced anything?
Yes. As long as you’re registered in the census of activities (modelo 036 or 037), the obligation to file the 303 exists every quarter, with or without income.
Is “I haven’t invoiced” the same as “no activity”?
No, and confusing them costs money. “No activity” means you’ve had no VAT transaction in the quarter, neither income nor expenses. If you’ve paid professional expenses with VAT, you’ve had activity even if you haven’t issued any invoices.
What do I lose if I tick “no activity” while having deductible expenses?
You give up deducting the input VAT on those expenses, and that VAT isn’t recovered later: it’s lost. If you file correctly with expenses only, the result comes out negative and is left in your favour to offset.
How do I file the 303 if I only have expenses and no income?
Leave the output VAT boxes (01-09) at zero, enter the base and the VAT of your expenses in the deductible VAT boxes, and mark the result as “to be offset” (not “to be refunded”, except in the fourth quarter).
What penalty is there for not filing the 303 with no activity?
It’s a tax offence even if the result is zero or negative. The usual fine ranges between 100 and 200 euros per unfiled return, and it’s entirely avoidable by filing on time.
In Cuéntamo, if you have your expenses recorded, you can see at a glance whether you have input VAT pending deduction or whether the quarter has genuinely been at zero. The freelancer module calculates the breakdown by tax rate automatically. Available at cuentamo.com.
Figures for 2026.
This article is checked against official sources and reviewed periodically. If you spot anything out of date, email us at [email protected].