Self-hosted sales commission software: own the calculator, not a per-rep bill

Paying sales commissions is a math problem with a compliance edge: every statement has to reconcile to the cent, survive a mid-year plan change, and be defensible when a rep disputes it. The software that does this is priced like it is doing something magic.

What the category costs

• QuotaPath publishes a $525 monthly platform fee on its Growth plan — "The platform fee includes the first 5 users" — then $35 per additional user per month, billed annually (pricing, read 21 July 2026, re-read 5 September 2026). The re-read added the tier above and the tier above that: Premium is an $800 platform fee plus $50 per additional user, on the same five-user inclusion, and Strategic publishes nothing at all — its card sends you to sales.

Worked at ten reps, that is $525 + 5 × $35 = $700 a month on Growth, and $800 + 5 × $50 = $1,050 on Premium (our arithmetic on their published figures). And note what the ladder does at the top: the vendor this category calls transparent still gates its largest plan.

• Spiff (Salesforce), CaptivateIQ, Everstage and most of the enterprise field are quote-gated — you cannot even see a price without a sales call.

There is no free open-source commission engine that a finance team would trust with payout math. So the real choice has been: rent a per-rep tool forever, or wrestle a spreadsheet that breaks the first time a deal straddles a tier.

The buy-once option

Commissa is a self-hosted commission calculator you purchase once — $69 — and one of the three products in the Finance Ops Suite; the demo is open without a sign-up. It computes flat, tiered, or per-category commissions in exact integer cents, splits a deal across straddled tier bands to the penny, honours effective-dated rule changes so past periods keep the rule that applied then, and produces a per-rep PDF/CSV statement that reconciles line-by-line to the period total.

Try the Commissa demo ↗Live, on sample data, no sign-up.

• No per-rep meter. Ten reps or a hundred, it is one payment.
• Penny-exact by construction — integer cents, integer basis points, proven by a shipped test suite you can run yourself.
• Your comp plans stay private, on your server, not in a vendor's cloud.

The honest limit

Commissa computes what each rep is owed and prints the statement — it does not pay anyone. Payouts settle through your own payroll, which also means zero payment or PCI surface. If you want a tool that also moves money or syncs deeply into a specific CRM's pipeline in real time, the SaaS platforms do that; Commissa does the calculation and the statement, exactly, for one price.

For a team that just needs the numbers right and the statement defensible, renting a per-seat platform for it is the expensive way to buy arithmetic. The rent-vs-own math shows how fast that flips, and the best self-hosted commission tracking in 2026 is the field guide with a worked tier-straddling example.

Every vendor figure in this category also lives in the Price Observatory — verified, dated, and source-linked, free to cite — and the calculator turns those figures into your own three-year number in ten seconds.