By Priya · 2026-08-27 · 523 views · 7 votes
We're on a flat-fee upsell app ($35/mo). Considering one of the ones that charges a % of upsell revenue instead, because on paper it's cheaper for us.
Then I did the maths and at our upsell volume it's not. But I might be doing the maths wrong. Anyone worked this out properly?
Ozan · 2026-08-28 · 8 votes
Rule of thumb: revenue share (usually 1-3%) beats flat fee until your upsell revenue passes roughly fee ÷ rate. At $35/mo and 2% that's $1,750/mo of upsell revenue. Below that, pay the %. Above it, pay the flat fee.
Most stores under ~500 orders/mo are below that line. You at 900 orders are probably above it, so your instinct is right — stay flat.
Priya · 2026-08-28 · 0 votes
That's a much cleaner way to put it than my spreadsheet. We're at about $2.4k/mo in upsells so flat it is. Thanks.
Anonymous · 2026-08-30 · 0 votes
the % ones also tend to have a free tier up to some revenue, good for testing whether post purchase even works for your products before paying anything