Business Registration
Practice
Filing with the tax office to declare that a business has started and to receive the number that lets it issue proof of a sale and deduct what it spends.
Why it exists
Selling something doesn't require paperwork. Hand over a bank account number, receive a payment, and the transaction has happened. The wall shows up one step later, when both sides have to write that payment into their books.
On the buyer's side there is nothing to justify the expense. To subtract money spent from its own tax bill, a company needs a document showing what it bought, for how much, and from whom — and a transfer into a personal account carries no such document. On the seller's side, there is no settled answer to where the tax on that income goes.
So the first contract at a young company kept stalling in the same place. Someone at the customer asks where to send payment, gets a bank account, and a few days later their finance team writes back to say the purchase can't be approved without a tax invoice. A tax invoice is the legal document recording who sold what to whom, for how much, and how much of that was value-added tax, filed with the tax authority at the same time. Issuing one requires a registration number.
Business registration fills that gap. The government gets a list of who is running what, and whoever registers gets a number proving they are on it. It works less like a gate for collecting tax and more like the credential that admits a company to transactions where documentation is required.
How it runs
Submit an application and a few supporting documents to the tax office, and the certificate usually comes back within two or three days. It can be filed online or in person.
There are five steps, and most of them are decisions rather than paperwork.
- Decide between a sole proprietorship and a corporation. A sole proprietor personally carries the debts and liabilities of the business. A corporation is a separate legal person created first, with the registration then filed in its name, which means the incorporation filing has to finish before this one starts. Anyone planning to raise investment saves trouble later by starting as a corporation.
- Pick an industry code. They come from a classification table maintained by the tax authority, and software services usually land under software development and supply within information and communications. The code chosen changes which tax rates apply and which exemptions are available.
- Pick a tax status. The choice is between the general status and a simplified one. The simplified status makes tax calculation easier for small sellers but restricts the ability to issue tax invoices, so any company selling to business customers picks the general status from the start.
- File the documents. The application, the owner's identification, and the lease for the place of business are the baseline. A business run from home puts the home address in the lease's place.
- Receive the certificate. The ten-digit number printed on it follows every transaction afterward. The party block of a contract, every tax invoice, the payment gateway review, and the seller information at the bottom of a website all use it. A payment gateway is the company that routes card payments, and its review uses this number to confirm the seller actually exists.
The filing itself is a day of work. Steps 1 and 3 are what take time. Both can be changed later, but changing them costs far more effort than getting them right once.
Who joins and when
The person who files is the founder. This is a declaration by whoever is taking on the business, so it isn't work that gets handed to a staff member.
Two people typically help. A tax advisor makes the call on the industry code and the tax status, because the classification table runs past a thousand entries and picking alone usually lands a company in a box that doesn't match what it does. For a corporation, a commercial law specialist handles the incorporation filing first, and the corporate registry extract that comes out of it becomes an input to this application.
Three moments force the timing.
- Before the first sale. The law asks for the filing within 20 days of the start of business, and filing late adds a penalty on revenue earned in the meantime. Money spent before registration can still be claimed as an expense within a limited window, so getting it done before the office deposit or the first equipment purchase works in the company's favor.
- Before signing a contract. A contract between businesses names each party by trade name and registration number. Without the number there is nothing to put in the blank.
- Before adding payments. The payment gateway review asks for a copy of the certificate, and a service sold online also needs an online sales report. That report can only be filed by a party that already has a registration number, which fixes the order.
How it sounds at work
"Can you send a copy of your registration certificate? I need the number for the contract."
The paperwork is moving and the party details are still blank.
"We don't have the registration yet, so this month's deal slips to next month."
Without a number there is no way to issue the invoice, so revenue gets recognized later.
"If you filed as simplified, switch to general. Business customers will ask for invoices."
The tax status chosen won't support the customers the company wants to sell to.
Pagedeck started selling the day after Grace incorporated and finished the registration. The first prospect was a 300-person company, and a company that size cannot push through a purchase with no documentation behind it. Showing up without a number turns the first meeting into a conversation about payment mechanics instead of the product.
The paperwork that moves after Sofia closes a deal starts from the same certificate. The customer's procurement team takes a copy of the certificate and the bank account, registers Pagedeck as an approved vendor, and only then issues a purchase order — and only a purchase order makes the tax invoice possible. Three steps hang off one number, so a late number means the deal is signed this month and the cash arrives next month.
What people get wrong
The common assumption is that registration waits until there's revenue. It reads like a tax filing, and tax filings do come after the money. This one comes before it. The first transaction is what demands the number: without it there's no contract to sign and no way to accept a card, and money already spent goes unclaimed while penalties accrue.
The other frequent worry is that registering raises the tax bill immediately. Having a number does mean the tax authority can see the revenue, which makes the fear understandable. But tax follows earnings, so no revenue means nothing owed — and registration is what opens the channel for reclaiming the value-added tax paid on equipment and contractors. Time spent unregistered isn't tax saved; it's a refund given up.
Easily confused with
| Term | Where it's filed | How it differs |
|---|---|---|
| Online sales report | The local government where the business is located | Only sellers operating online file it. It requires a registration number, so it always comes second |
Where to go next
- Business regulation
see how one-time filings differ from the rules that apply every day you sell
- Online sales report
the next filing if anything is being sold online
Last updated 2026-09-16