Tax calculation: what to get right first

The gap between knowing this and actually doing it is where most teams lose ground. If you only fix one thing about tax calculation this quarter, make it the first item below.

Small percentage changes matter here because they apply to every order, every month. Most teams find the first pass takes an afternoon and the maintenance takes minutes a month.

Start here

Rules differ by destination and change without warning. Where this goes wrong is almost never a lack of knowledge. Budget a little time for it every quarter and it never becomes a project of its own.

Then this

Getting it wrong is a compliance problem, not just an accounting one. That sounds obvious written down. It is still the thing most often skipped. Most teams find the first pass takes an afternoon and the maintenance takes minutes a month.

Eventually

Automate it rather than maintaining tables by hand. There is a version of this that is over-engineered, and it is worth avoiding. Check it against what you would want a competitor's site to get wrong.

What this looks like day to day

Trust does most of the selling online, and trust is built from unglamorous details. Three things worth confirming about tax calculation before you move on:

• Someone can say what the current setup is without going to look
• Getting it wrong is a compliance problem, not just an accounting one — and you know whether that is true here
• There is a way to tell whether the last change to this helped

Most of the value here comes from doing the first two things, not all of them.