Wrong tax code
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Tax deadlines · Payments
The F24 form
It is the form you use to pay almost everything in Italy: taxes, social security contributions, IMU (the municipal property tax), local levies. If you receive one already filled in, you need to check three things on it; if you fill it in yourself, you need to know about ten.
01 · The form
What the F24 form is and what it is for
The F24 (the Italian tax payment form) is the unified form used to pay almost all Italian taxes and contributions. Its purpose is to let you pay, with a single document, amounts due to different bodies (the Agenzia delle Entrate, the Italian Revenue Agency; INPS, the national social security institute; the Regions; the municipalities) and above all to offset credits owed to you by one body against debts you owe to another.
That is what sets it apart: a VAT credit can reduce a contributions debt, a credit from the 730 (the Italian tax return for employees and pensioners) can reduce your IMU. The form closes at zero when credits and debts match, and even then it must still be filed, because it is the document through which the offset is communicated.
- Income taxes: balance and advance payments of IRPEF (personal income tax), IRES (corporate income tax), cedolare secca (the flat tax on rental income), substitute taxes.
- VAT: periodic settlements, the annual balance, the December advance payment.
- Withholding taxes deducted as a sostituto d'imposta (withholding agent) from employees, contractors and professionals.
- INPS contributions: artisans, traders, Gestione Separata, employees and domestic workers.
- Local taxes: IMU, TARI (the waste collection tax) where applicable, regional and municipal income tax surcharges.
- INAIL premiums (workplace accident insurance), the Chamber of Commerce fee, registration tax on leases.
There are several versions of the form: the ordinary F24, the simplified F24 for local taxes, the F24 accise for excise duties and the F24 Elide, used for registration tax, leases and some special levies. The tax code tells you which form it belongs to: using the wrong one leads to rejection.
02 · The layout
How the form is laid out
The ordinary form is divided into sections, each one for a different body. Every line carries a tax code, a reference period and an amount, either owed or credited.
- The tax code identifies what you are paying: it has four characters and leaves no room for approximation.
- The reference year is the tax year, not the year in which you pay. This is by far the most common mistake.
- The instalment/month field is used for payments in instalments and for monthly contributions.
- The final balance is the difference between total debts and total credits: if it is zero, the form must still be filed.
- The body code in the IMU section is the cadastral code of the municipality, which is neither the postcode nor the province abbreviation.
| Section | What it contains |
|---|---|
| Taxpayer | Codice fiscale (Italian tax code), personal details, any co-obligor with an identification code |
| Erario (State treasury) | IRPEF, IRES, VAT, withholding taxes, substitute taxes, penalties and interest from voluntary correction |
| INPS | Contributions, with reason code, registration number or office code and reference period |
| Regions | Regional income tax surcharge, IRAP (regional tax on productive activities) |
| IMU and other local taxes | Cadastral code of the municipality, number of properties, advance or balance flag |
| Other social security bodies | INAIL, professional pension funds, smaller bodies |
03 · The payment
The ways to pay it
There are several routes and they are not interchangeable: some are closed to anyone with a partita IVA (Italian VAT number), others to anyone offsetting credits.
Home banking
The channel private individuals use most. You fill in the form in your bank's online screen and the receipt arrives within a few days. Keep it.
The Agency's online services
F24 web or F24 online, from your personal area with SPID or CIE (Italian digital identity). It is the only route when the form closes at zero.
Authorised intermediary
The practice prepares and sends the form, with the amount debited from the client's account. This is the standard method for clients we look after.
Bank or post office counter
Only possible for private individuals with no partita IVA and no offsets. Anyone with a partita IVA must use the online channels.
If you have a partita IVA, you must always use the online channels. And anyone filing an F24 with an offset (even a partial one, even of a few euros) must go through the Agenzia delle Entrate's services: home banking is not allowed when a credit is being offset.
04 · Credits
How offsetting works
This is the feature that makes the F24 different from an ordinary payment slip: a credit built up with one body can cut a debt owed to another. It is also the most closely watched feature, because it is where abuse tends to concentrate.
- Horizontal offsetting uses a credit on one tax to pay another: this is the kind that goes through the F24.
- Vertical offsetting uses a VAT credit to pay VAT: it stays within the same tax.
- Above certain thresholds the credit requires the visto di conformità (the compliance check) on the tax return.
- VAT credits and tax credits have fixed dates from which they can be used: before the return is filed they cannot be used beyond certain limits.
- Anyone with overdue tax bills above a certain threshold cannot offset until they are settled.
- There is an annual cap on horizontal offsetting, with higher thresholds for some categories.
Why an F24 gets rejected
A form with an offset can be rejected after it has been sent.
- The credit does not exist or has already been used in full
- The tax code of the credit is not compatible with that of the debt
- There are amounts already handed to the tax collection agent
- The annual offsetting limit has been exceeded
05 · Corrections
What to do if the form is wrong
Almost every mistake can be corrected, and in most cases without penalties, because the money has reached the treasury anyway. The procedure depends on what is wrong.
Wrong reference year
Same procedure. This is the most frequent mistake: an advance payment is allocated to the wrong year and the debt shows as unpaid.
Too little paid
You top it up with ravvedimento operoso (voluntary correction), paying a reduced penalty and interest as well.
Payment missed
Voluntary correction, with a penalty that rises with the delay. The sooner you put it right, the less it costs.
Too much paid
The excess becomes a credit you can offset, or you can claim it back as a refund in your tax return.
Offset you were not entitled to
It has to be repaid with a penalty. If the credit did not exist at all, rather than simply not being due, the treatment is much more severe.
06 · The proof
The receipt and why you should keep it
Payment is proved by the receipt (quietanza), not by your bank statement. It is the document that shows the online filing reference and the confirmation that the form was accepted.
- Keep it for the whole period during which a tax assessment is possible, together with the return it relates to.
- It proves the date of payment, which is the date that counts when penalties and interest are calculated.
- In the Agency's cassetto fiscale (your online tax records) you can find every F24 filed, with its outcome and amounts.
- An F24 that is debited but then rejected produces no payment: the debit may not happen, or it may be reversed. Always check the outcome, not just that it was sent.
- If the debit fails for lack of funds, the payment is treated as not made: you need a new F24 with voluntary correction.
If you receive your F24 forms from the practice, you have three things to check, always the same ones: that the amount is what you expected, that the due date is in the future and not the past, and that the IBAN to be debited is the right account. The rest is up to us.
Frequently asked
The questions that keep coming up
Can I pay the F24 after the due date?
Yes, with ravvedimento operoso (voluntary correction): you pay the tax, a reduced penalty and the interest, all on the same form but with separate tax codes.
The penalty grows as the delay grows, so it makes sense to put things right straight away. Within a few days of the deadline the extra cost is almost token.
I have a credit from my 730. Can I use it to pay IMU?
Yes, that is exactly what horizontal offsetting is for. The IRPEF credit shown in your tax return can cut the IMU you owe on the same F24 form.
The form must however be filed through the Agency's online channels, not through home banking, because it contains an offset.
My F24 comes to zero. Do I still have to file it?
Yes, and it is compulsory. The zero-balance form is the document through which you communicate the offset: if it is not filed, the offset is treated as not having taken place.
It can only be sent through the online services of the Agenzia delle Entrate.
Can I pay what I owe in instalments?
The balance and advance payments of taxes due from your tax return can be paid in instalments, in monthly amounts with interest added and due dates set by law.
The November advance payments and withholding taxes cannot be paid in instalments. Tax bills and notices follow their own rules, covered on the page about the avviso bonario (informal tax notice).
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Let's talk
A wrong F24 is not a disaster, but it needs to be corrected quickly
A wrong tax code, the wrong reference year, a credit offset you were not entitled to: all of them can be fixed, each with its own procedure. Bring us the receipt.