SaaS Mode Margins After 2026 Rebill

The short version

If you have fewer than 40 sub-accounts, the new tiers will *cost* you margin unless you raise your floor price. Above 80 sub-accounts, you'll see a 7-12 point bump.

The three line items everyone markups wrong

• A2P registration — most agencies eat this. Don't. Pass through at cost + 20%.
• Voice minutes — markup is fine, but disclose it. The 2026 transparency rule means you have to.
• Email sends — the new pooled allowance changes the math; recalculate your cost-per-1k.

A working spreadsheet model

We're publishing the model used by all three agencies in the teardown — plug in your own numbers and it'll spit out your new floor price per sub-account.