An ATECO code chosen in a hurry
A code that does not match the real activity can change the pension fund, the coefficient and the Chamber of Commerce obligation. Correcting it later requires a change filing and sometimes a review of contributions.
30 September 2026 · VAT number
When people ask how long it takes to open a partita IVA (Italian VAT number), they are usually thinking of the number itself, which arrives quickly. The real time goes before and after: into the choices you make before the application and into the registrations that follow it. Here you will find the order of the steps and how long, in practice, each one takes.
The application to start trading is a form of a few pages. Filling it in takes ten minutes, but only if you have already decided three things. If you have not decided them, the form decides them for you, and correcting them afterwards costs more time than you would have spent beforehand.
The first is the ATECO code, the official description of your activity. It is not just a label: it determines whether you must register with the Registro Imprese (the Companies Register kept by the Chamber of Commerce), which pension scheme you end up in and, if you choose the flat-rate scheme (regime forfettario), the coefficient used to calculate your taxable income. The guide on how to choose your ATECO code goes into the detail.
The second is the tax regime: flat-rate, simplified or ordinary. The flat-rate scheme has entry requirements and grounds for exclusion that must be checked against your working history, not just against your turnover forecasts.
The third is the pension fund: the Gestione Separata of INPS (the Italian social security institute) for many professionals without a professional register, the artisans' or traders' scheme for those running a business, or the fund of your own profession if you belong to a professional order. This decides whether you pay contributions as a percentage of your income or fixed contributions regardless of how much you bring in. The full picture of these choices is on the page about how to open a VAT number in Turin.
The order matters, because some steps depend on the outcome of the ones before. For a professional with no obligation to register with the Chamber of Commerce, the process stops after the first two; anyone opening a business goes through all of them.
You fix the ATECO code, the tax regime and the pension fund, and you check the flat-rate scheme requirements against your actual situation.
The individual files the start-of-activity form with the Agenzia delle Entrate (the Italian Revenue Agency), online, also through an intermediary. The number is assigned straight away.
Anyone carrying on a business activity sends the Comunicazione Unica (the single registration filing) to the Chamber of Commerce, which passes the information on to INPS and, where needed, to INAIL.
If the activity requires it, you file a SCIA (certified notice of start of activity) with the Sportello Unico, the Comune's one-stop business desk. At the same time you set up PEC (certified email), a digital signature and electronic invoicing.
Below you will find indicative timings, which hold in normal conditions and with complete paperwork. They are not legal deadlines: they depend on how busy the offices are, on the time of year and on your activity.
| Stage | Indicative time | What it depends on |
|---|---|---|
| Preliminary choices | One meeting, sometimes two | How clearly defined the activity is and your current employment position |
| VAT number | The same day | Online filing: the number is assigned immediately |
| Registration with the Registro Imprese | A few working days | The Chamber of Commerce's review and how complete the file is |
| INPS registration as an artisan or trader | A few weeks | INPS processing times after the Comunicazione Unica |
| SCIA to the Comune | Effective from filing, subject to checks | The type of activity and the requirements for premises and qualifications |
| PEC, digital signature, invoicing | A few days | The provider you choose and identity verification |
The tax side is identical throughout Italy. What changes are the local offices: the Turin Chamber of Commerce for the Registro Imprese and the register of artisans, the Comune's Sportello Unico per le Attività Produttive (one-stop desk for business activities) for activities that require a SCIA, and the ASL (the local health authority) for anyone handling food.
The activities that most often need a step at the Comune are retail trade from fixed premises, serving food and drink, food workshops, hairdressers and beauticians. For these, the real opening date depends on the requirements for the premises, not on the VAT number: it is worth checking them before you sign a lease.
Then there is the annual Chamber of Commerce fee, due from anyone registered with the Registro Imprese, and the regional and municipal surcharges on IRPEF (personal income tax), which do not apply to those on the flat-rate scheme. The amounts must be checked against the rules for the current year.
A code that does not match the real activity can change the pension fund, the coefficient and the Chamber of Commerce obligation. Correcting it later requires a change filing and sometimes a review of contributions.
You pay fixed contributions for months with no income and use up a year of the reduced-rate period. The article on opening mid-year covers this.
Employment income, dealings with a former employer, shareholdings in companies: these are the grounds for exclusion that come to light late.
For anyone registered with the Registro Imprese, PEC is compulsory, and communications from the Agenzia also arrive there. It needs checking regularly.
Once you have the number, there are only a few things to sort out, but they need doing straight away. Set up the channel for receiving electronic invoices, so that your suppliers' invoices arrive in the right place. Open an account dedicated to the activity: for an individual it is not always compulsory, but keeping business income separate from household spending makes every check simpler.
Next, set up your savings for tax. An example with round and purely illustrative figures: if for every €1,000 you receive you put €300 aside in a separate account, by June you already have the cash for taxes and contributions. The right percentage for you depends on the regime and the pension fund, and is worked out once, at the start.
Finally, note down the deadlines for the first year, which for anyone opening during the year are different from those of the following years. If you are on the flat-rate scheme, the page on the flat-rate scheme in Turin explains what you pay and what you do not. To go over all the steps in one place, go back to the guide on opening a VAT number in Turin.
Yes, you can file the declaration of start of activity yourself using the login details for the Agenzia's online reserved area. The form itself is not complicated: the work lies in the choices it contains, namely the ATECO code, the regime and the pension fund, which are worth settling beforehand.
There is no filing cost for the declaration of start of activity. The costs come from the other steps: fees and stamp duty for the Registro Imprese where it applies, tools such as PEC and a digital signature, and any professional assistance.
In many cases yes, but you need to check your employment contract, any exclusivity clauses and, if you are aiming for the flat-rate scheme, the limit on employment income and the ban on invoicing mainly your former employer. The page on VAT number and employment covers this.
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