Registering Your Business to Sell Online: Which Procedures, in What Order

Almost every online business starts informal, and that's fine: you test the idea, sell the first units over WhatsApp, get paid by transfer. The problem shows up precisely when things go well. The payment gateway demands a tax registration to open your account. The corporate customer can't buy without an invoice. The bank freezes movements it can't justify. Informality doesn't break when you sell little — it breaks when you start selling for real.

This article puts the paperwork in practical sequence — what's essential from day one, what can wait, and what's worth doing even if nobody demands it. The exact names change by country; the logic is the same everywhere.

When to formalise: the signals

• You're going to charge through a gateway. They all require a tax ID and a verified bank account. Without this, there's no online store that takes cards.
• A customer asks for an invoice. Losing B2B sales because you can't invoice is one of informality's most direct costs.
• You cross your country's threshold. Many jurisdictions have simplified regimes with income caps; passing them unregistered turns a procedure into a liability.
• You need to buy with invoices. Without tax registration you can't deduct expenses, and your real cost rises by the tax you can't recover.
• You want serious paid advertising. Ad platforms request fiscal data for billing, and personal accounts have ceilings.

The paperwork sequence, in order

The order matters because each step feeds the next: no tax registration means no business account, no account means no gateway, no invoicing means no corporate customers. Steps 4 and 5 are developed in detail in e-invoicing for online stores and payment gateways in Ecuador and LATAM.

Sole trader or company?

The classic starting doubt. The short answer: almost every small online business starts perfectly well as an individual with a tax registration, and incorporates when there's a concrete reason — not before.

• Individual / sole trader: fast, cheap, simple bookkeeping, ideal for validating and for the first years. Against: you answer with your personal assets, and some regimes have income ceilings.
• Company (LLC, SAS, depending on the country): separates your assets from the business, allows partners and investment, reads well to corporates. Against: it costs money to set up and maintain (accountant, filings, annual obligations).
• The real reasons to incorporate: a partner, an investor, large contracts that require a legal entity, or personal assets that are now worth protecting.
• The bad reason: "it looks more professional". An invoice from a registered individual is worth exactly the same as one from a company.

The store's legal pages

Formalising isn't only about the tax office: your online store also has obligations towards the customer, and the legal pages are part of compliance — as well as trust signals the wary buyer actively looks for.

• Terms and conditions: who sells, what's sold, how it's paid, how it's delivered and which law applies. It's your contract with every buyer.
• Privacy policy: what data you collect, what for, and who you share it with. Mandatory in nearly every jurisdiction with a data-protection law.
• Return policy: your country's legal withdrawal right as the floor, your commercial policy on top.
• Seller identification: name or legal name, tax registration and visible contact details. Mandatory in several countries; trust-building in all of them.
• A cookie or tracking notice, if you use analytics or advertising, wherever regulation requires it.

Taxes, without the drama

Fear of taxes stops more formalisations than their real cost does. The basic structure is the same nearly everywhere, and at small-business volumes it's usually very manageable:

• Consumption tax (VAT or equivalent) is paid by your customer; you collect and declare it. It isn't your cost — unless you sell informally and absorb it without noticing.
• Income tax falls on your profit, not your revenue. With well-documented expenses — purchases, shipping, fees, advertising — the base drops legitimately.
• Simplified regimes exist exactly for businesses that are starting: reduced rates and minimal bookkeeping up to a threshold. Ask about your country's before assuming the general regime.
• An accountant from the start costs little at this scale and prevents the two expensive errors: declaring wrongly and not declaring. Pick one who already has online-selling clients.

The classic transition mistakes

1. 01Mixing accounts. The personal account that receives sales, pays suppliers and also the supermarket is bookkeeping hell — and a banking red flag. Separate account from registration day one.
2. 02Formalising with the tax office and ignoring sector permits. Food, cosmetics and children's products have their own health registrations; selling them without permits risks closure, not just fines.
3. 03Registering and then not filing. Registration puts you on the radar: the zero return also has to be filed. An abandoned registration generates automatic fines in many countries.
4. 04Invoicing some sales and not others. The mismatch between what your gateway collects and what you declare is trivial for a modern tax authority to detect.
5. 05Leaving the name unprotected. Tax registration doesn't protect your brand; they're separate procedures. Once the name starts being worth something, the trademark registry is the next stop.