The Sales Tax You Collect Isn't Yours (and It Can Sink You)
Every time you invoice with sales tax (VAT/IVA, depending on your country), part of what lands in your account isn't yours. It's money you're holding temporarily for the tax authority. The problem is that day to day it looks just like the rest of your cash: it sits in the same account, pays the same payroll, covers the same rent. And when it's time to file, many business owners discover they already spent it.
This isn't usually malice or carelessness. It's simply that nobody set that money aside from the start.
Why sales tax isn't your income
When you sell something with sales tax included, you act as an intermediary: you collect the tax on behalf of the government and later remit it (netting out the tax you paid on your own purchases, depending on how it works in your country). In other words, that money passes through your cash register, but it isn't a result of your operation or your margin.
The typical mistake is looking at your bank balance and thinking "I have cash available." If that balance includes tax you still owe, you're actually seeing more cash than you can really use.
The most common trap: mixing everything into one pot
Let's imagine, purely as an illustrative example, that you sell 10,000 in a month with a 19% tax rate. Of that 10,000, roughly 1,600 isn't yours — it belongs to the tax authority. If you don't set it aside, it's very easy to use it to pay suppliers, payroll, or an urgent expense, trusting that "by the time I have to file, more money will have come in."
The problem is that assumption doesn't always hold. If sales drop one month, or a client pays you late, you're left without the money you already owed elsewhere. And since sales tax generally isn't negotiable with the tax authority, you end up financing it with debt, with the business credit card, or by delaying other payments.
How to separate it without overcomplicating things
You don't need a complicated system to fix this. A few simple practices go a long way:
- Open a separate savings account just for taxes payable (sales tax and, if it applies to your case, withholdings). Don't touch it for anything else.
- Every time you invoice, automatically transfer the corresponding percentage into that account. If your net tax margin isn't exactly 19%, use an approximate percentage and adjust at the close of the period.
- Check that account before approving large expenses. If your operating account's "available" balance no longer includes the tax owed, you make better decisions about what you can actually spend.
- Keep your records up to date, not just at the end of the period. The later you find out how much you owe, the less room you have to adjust.
These rules vary by country and tax regime, so it's worth checking your specific situation with your accountant. The general idea — set aside what isn't yours — applies almost everywhere.
If you're already behind
If you've already mixed the money together and realize you won't have enough to cover the period's tax bill, the worst thing you can do is wait until the deadline to find out. In general, it's best to talk to your accountant as soon as possible: there are often payment options or extensions that vary by country, but the sooner you act, the more alternatives you have.
What you can control starting now is making sure this doesn't happen again. Setting sales tax aside as soon as it comes in — not when there's "extra" — is the difference between a business that sells well and one that also has the cash where it needs to be when it needs it.
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