Free vs paid platforms: the break-even maths

The calculation nobody shows you

Platforms in this market use two models:

• Commission-only — you pay a percentage of what you sell, and nothing if you sell nothing.
• Subscription plus commission — you pay a fixed fee regardless of sales, usually in exchange for a lower percentage.

The second is only better once you sell enough for the lower percentage to recover the fixed fee. That crossover point is easy to calculate and almost never presented.

The formula

Break-even monthly sales = monthly subscription / (higher rate − lower rate)

Worked example. Suppose Platform A takes 15% with no monthly fee, and Platform B takes 10% but charges $15/month.

The commission saving is 5 percentage points, so every $1 of sales saves you $0.05.

$15 / 0.05 = $300 of sales per month

Below $300/month in sales, the free-to-list platform nets you more. Above it, the subscription one does.

Run this with the real numbers you see at signup. Do not run it with numbers from an article, including the illustrative ones above — they are there to show the method, not to describe any specific platform.

Why this matters more than it looks

The subscription is charged whether or not you sell anything, and in an oversupplied market a meaningful share of new sellers make few or no sales in their first months.

That produces the asymmetry worth understanding: on a commission-only platform, a bad month costs you nothing. On a subscription platform, a bad month costs you the subscription. The fixed fee converts uncertainty into guaranteed loss.

The sequencing this implies

1. Start on whatever costs nothing up front. Find out whether you sell at all.
2. Measure your actual monthly sales for two or three months.
3. Then run the break-even calculation with your real volume.
4. Only pay a subscription once your numbers clear the threshold — and re-check periodically, because volume moves.

This is the reverse of how most guides sequence it. They recommend the paid tier immediately, generally because that is what pays commission.

The one exception

If a subscription buys something other than a lower commission — meaningfully better placement, or access to features that demonstrably drive sales — then break-even is not purely arithmetic.

Be sceptical here. “Better visibility” is easy to claim and hard to verify, and you are the one carrying the cost of the experiment. If you do test it, test it for a fixed period against a known baseline rather than indefinitely.

What this page cannot tell you

Your sales volume. Nobody can, and any figure offered to you is a guess dressed as data. The point of the formula is that it works with your numbers once you have them — which is exactly why you should get those numbers before paying anyone.