Ignition

Ignition is the revenue and billing automation platform for accounting and professional services firms, automating proposals, engagement letters, billing, and payments in one place so firms get signed and paid without chasing invoices.

What is Ignition?

Ignition is a proposal-to-payment automation platform purpose-built for accounting, bookkeeping, and other professional services firms. Where generic proposal tools stop at the signature, Ignition embeds the engagement letter, the e-signature, and the payment method into a single link — the client reviews scope and pricing, signs, and enters card or ACH details in one session, and billing starts automatically from the moment of acceptance. For recurring work like monthly bookkeeping, that means no invoices to send and no follow-ups to chase; Ignition reports a 91% auto-collection rate across its user base. It integrates natively with Xero, QuickBooks Online, MYOB, and Sage, and connects to practice management tools like Karbon and Xero Practice Manager, automatically creating clients and recurring invoices downstream when a proposal is accepted. On TrustRadius it scores 8.2 out of 10 across 14 reviews, with reviewers praising the all-in-one workflow, responsive support, and the cash-flow automation, while flagging the cost for smaller firms, slow payment disbursement, and the inability to issue refunds in-app. Plans scale from Solo at $49/month for a single user and 20 active clients to Pro+ at $499/month, and Ignition was named Xero Global Practice App of the Year 2026.

Key Features

• Proposals & engagement letters — Branded online proposals with scope, terms, and pricing that clients e-sign and pay in one step
• Automated billing — Fixed-fee, recurring, or one-off invoices that collect automatically on schedule
• Payment capture at signing — Clients enter card or ACH details as they accept, so billing starts immediately
• Bulk renewals — Renew client engagements and apply across-the-board price increases in one batch
• Instant bill for out-of-scope work — Charge stored payment methods for extras without a new proposal
• Accounting integrations — Two-way sync with Xero, QuickBooks Online, MYOB, and Sage for automatic invoice creation
• Practice management sync — Auto-create jobs and tasks in Karbon, XPM, and other tools on acceptance
• AI Price Insights — Benchmark fees against anonymized industry data on the top tiers
• Revenue forecasting — A dashboard projecting recurring revenue from active proposals and billing schedules
• Deals pipeline & online forms — Optional add-ons to track leads and qualify new inquiries

Who is it for?

• Accounting, bookkeeping, and CPA firms with recurring client engagements who are tired of chasing invoices
• Practices that want engagement letters, e-signatures, and payment collection collapsed into one flow
• Firms on Xero or QuickBooks Online that want proposals to auto-create invoices and sync payments
• Growing practices that need to renew annual engagements and raise prices in bulk
• Service-based businesses with 20+ recurring clients where invoice chasing eats real time

Who is it NOT for?

• Solo practitioners with fewer than ~10 one-off clients — the cost outweighs the time saved
• Firms that need a permanent free tier — Ignition offers only a 14-day trial
• Practices that want full workflow and task management bundled in — pair it with Karbon for that
• Teams that need instant refunds or same-day payment disbursement in-app
• General agencies better served by a cheaper generic proposal tool like PandaDoc