Quoted before you run.
Billed only when it runs.

How billing works

• One flat platform fee. Bring your own provider credentials (BYOK): the provider bills you directly at its published rates; your wallet pays a 5.5% platform fee on the estimated provider cost, the vendor’s published formula on your circuit’s transpiled gate counts.
• Admission control, not overdraft. An estimate over your balance is refused upfront (402); a max_spend_usd cap is re-checked after the full transpile, before any hardware spend.
• Exactly once, both ways. Success writes result, ledger line, and debit in one transaction, database-enforced; a refund credits back the exact debited price, once per job. Any month exports to CSV.

What’s always free

• Estimates. The public estimator is anonymous; POST /v1/jobs/estimate prices your own circuits, enqueueing nothing.
• Simulators with a $0 rate card (account required): noiseless or calibration-matched noisy runs, billed $0.000000 on a real ledger line, the same integration path as hardware.
• Failure. Failed transpiles, rejected submissions, cancelled-before-execution jobs, and provider errors are never billed.

Refunds and wind-down

Unused balance refunds in full to your original payment method on request; balances never expire. If Pauli ever shuts down, every unused balance refunds automatically with at least 30 days’ notice (Terms of Service §5).

Provider rate cards

The providers’ published rates, live from the registry: what your provider bills you. Pauli’s platform fee is separate, to your wallet.

Volume terms: talk to us.