The One Books
The One Books is the accounting and billing platform built for MSPs. It handles everything from chart of accounts and general ledger management to invoicing, payment collection, expense tracking, bank reconciliation, and financial reporting — all tightly integrated with the rest of The One Stack.
Who Uses Books?
| Role | Primary Tasks |
|---|---|
| MSP Owner | Financial overview, P&L review, budget tracking, revenue recognition |
| Bookkeeper | GL entries, bank reconciliation, month-end close, tax filings |
| Finance Staff | Invoice creation, payment recording, expense management, AR/AP |
| Office Manager | Vendor management, bill payments, purchase orders |
Key Capabilities
- General Ledger — Double-entry accounting with a pre-configured MSP chart of accounts, journal entries, and accounting periods
- Accounts Receivable — Invoices, estimates, payments, credits, refunds, sales receipts, and AR aging
- Accounts Payable — Vendor management, bills, bill payments, purchase orders, check printing, and 1099 tracking
- Banking — Bank account connections, transaction import (CSV/OFX), auto-categorization rules, and reconciliation
- PSA Integration — Billable time flows automatically from PSA into Books as GL entries
- Stripe Integration — Payment processing for customer invoices with automatic GL posting
- Financial Reports — Income statement, balance sheet, cash flow, trial balance, AR/AP aging, MRR waterfall
- Tax Management — Multi-jurisdiction tax rates, tax agencies, nexus tracking, and tax return support
- Multi-Entity — Run multiple legal entities under one org with consolidated reporting
- Multi-Currency — Exchange rate management and FX reporting for international MSPs
- Inventory & Products — Product catalog with inventory tracking and cost basis
- Projects & Time — Job costing with time entry tracking linked to GL
- Budgets — Budget vs. actuals reporting by account and period
- Fixed Assets — Asset tracking with automated depreciation schedules
Where Books Fits in the Ecosystem
Books is the financial backbone of The One Stack:
| Integration | How It Works |
|---|---|
| PSA | Billable time and contracts sync automatically into Books as GL entries |
| Hub | Subscription billing for The One Stack products flows through Books |
| Portal | Clients view and pay invoices through the client portal |
| CRM | Closed deals can trigger billing setup in Books |
| Stripe | Payment processing with webhook-driven GL posting |
| Relay | Invoice delivery emails sent via Relay |
| Defend | Forensic response time entries post to Books for billing |
Prerequisites
Before using Books, you need:
- A Hub organization — Books authenticates through Hub SSO
- PSA configured (optional) — Required for automatic billable time sync
- Stripe account (optional) — Required for online payment collection
Next Steps
- Getting Started — Set up Books for the first time
- Chart of Accounts — Understand the MSP-optimized chart of accounts
- Invoicing — Create and send invoices
- PSA Integration — Connect billable time from PSA