Real-time
Two-way sync
Changes in Bill or QuickBooks instantly reflect in both systems. No stale data, no manual imports.
Accounting and finance
Bill to QuickBooks integration — real-time, two-way sync
Keep Bill and QuickBooks in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.
- SOC 2 and 6 other compliance frameworks
- POC with real engineers in minutes
Adopted by fast-scaling companies moving mission-critical data in real time
Case study
Migrated from MuleSoft
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Migrated from Celigo
Migrated from Heroku Connect
Migrated from Matillion
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Migrated from Fivetran
Case study
Migrated from Celigo
Why teams connect Bill and QuickBooks
Keep the customer, invoice, and payment records that Bill and QuickBooks share consistent in real time, whether the two systems split your finance stack or one is replacing the other.
Two finance systems in one company usually means one of two setups. Either the systems divide the work, with one issuing invoices or serving a business unit while the other holds the books, or one is on its way out and both must stay accurate during the transition. In both cases, the customer, invoice, and payment records the two systems share start to drift the moment updates are keyed twice or moved by hand.
Stacksync syncs Bills, Vendors, Invoices, Customers in Bill with Payments, Bills, Vendors, Items in QuickBooks bi-directionally and in real time. A record created or corrected in either system appears in the other within seconds, with field-level mapping and conflict resolution in place of CSV exports and nightly batch jobs.
That matters most at close. When both systems agree on who was billed, what was paid, and what is outstanding, reconciliation stops being a hunt for which copy of the truth is current.
Common use cases
- 01 Read approved Bills and their line items into a Postgres warehouse for spend, accrual, and cash-flow reporting without CSV exports.
- 02 Sync Customers and Invoices from BILL AR into a CRM or ERP so sales and finance see billing and payment status on the account.
- 03 Push bills and vendor data from procurement systems into QuickBooks for AP processing.
- 04 Reconcile payment-processor payouts against QuickBooks transactions.
Common sync patterns
Entity or business-unit roll-up
Where each system serves a different entity or unit, sync the shared records so group-level reporting starts from consistent data.
Where Bill issues invoices and QuickBooks holds the books
Invoices and payments recorded on the billing side land in the system of record automatically, so revenue is captured once and correctly.
Parallel run during a migration
When one system is replacing the other, keep both live and matching through the cutover, so no transaction falls between the last export and go-live.
What you can sync between Bill and QuickBooks
Representative objects on each side — any object or custom field can map to any target. Schemas are auto-detected; types are converted between the two systems.
| Bill objects | QuickBooks objects | How this pairing syncs | |
|---|---|---|---|
| Bills Accounts-payable amounts owed to vendors, with bill line items; read and created via /v3/bills and pulled incrementally by filtering on createdTime/updatedTime. | Bills Payables written in from procurement systems for AP processing | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Vendors Payee master records; synced two-way with vendor/supplier tables in an ERP or accounting system so new payees don't have to be re-keyed. | Vendors Supplier records aligned with purchasing and spend tools | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Invoices Accounts-receivable invoices sent to customers; created and read via /v3/invoices to keep billing status aligned with the ERP or CRM. | Invoices Receivables created from closed deals or orders and read back for payment status | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. Custom fields on either side are included in the mapping. | |
| Customers AR customer master records; mapped to customer/account records in a CRM or ERP so finance and sales share one view. | Customers Billing entities kept consistent with CRM accounts and subscription tools | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. Custom fields on either side are included in the mapping. | |
| Vendor Credits and Credit Memos AP and AR adjustments applied against bills and invoices; synced so balances stay accurate on both sides. | Journal entries Manual postings exported for consolidated financial reporting | Vendor Credits and Credit Memos is specific to Bill and Journal entries to QuickBooks — each maps to any object or custom field on the other side. | |
| Payments Outgoing vendor payments and received customer payments; read for reconciliation and created to schedule bill pay. | Estimates Quotes that convert to invoices, synced with CRM quoting flows | Payments is specific to Bill and Estimates to QuickBooks — each maps to any object or custom field on the other side. |
How changes propagate between Bill and QuickBooks
Each direction of the sync is driven by what the source system can signal and what the destination accepts — detection, delivery, and expected latency below.
Bill QuickBooks Sub-second propagation
DetectionBill notifies Stacksync of record changes through webhook events. Webhook event subscriptions (POST /v3/subscriptions) for bills, vendors, payments, invoices, and bank accounts, with polling on.
DeliveryEach detected change is written to QuickBooks through its API, with automatic retries and rate-limit backoff.
QuickBooks Bill Sub-second propagation
DetectionQuickBooks pushes changes as they happen — webhook events backed by change data capture. Webhooks for entity change events, plus a Change Data Capture query operation for pull-based deltas.
DeliveryEach detected change is written to Bill through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Bill: 20,000 requests per developer key per hour; login (POST /v3/login) capped at 200/hour; maximum 3 concurrent requests per developer key per organization. Spend & Expense API is a separate token at 60 calls/token/minute.
- QuickBooks: Subject to per-realm API request limits.
What ships with Bill ⇄ QuickBooks
Connect Bill and QuickBooks for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Bill–QuickBooks connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Bill or QuickBooks data changes, update records, fire webhooks, or kick off sequences without brittle API scripts.
At scale
Event queues
Handle millions of events per minute without losing a single Bill or QuickBooks record.
Observability
Monitoring
Track your Bill ⇄ QuickBooks sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Bill and QuickBooks.
How the Bill and QuickBooks connectors work
Bill
- Integration surface
- REST/JSON (BILL v3 Connect API)
- Authentication
- Session-based: POST /v3/login with username, password, organizationId, and a developer key (devKey) returns a sessionId that is passed with the devKey as headers on every subsequent call; OAuth is available for partner/embedded apps
- Change detection
- Webhook event subscriptions (POST /v3/subscriptions) for bills, vendors, payments, invoices, and bank accounts, with polling on createdTime/updatedTime list filters as the fallback
- Capabilities
- read · write · webhooks
- Rate limits
- 20,000 requests per developer key per hour; login (POST /v3/login) capped at 200/hour; maximum 3 concurrent requests per developer key per organization. Spend & Expense API is a separate token at 60 calls/token/minute.
QuickBooks
- Integration surface
- REST API (QuickBooks Online)
- Authentication
- OAuth 2.0
- Change detection
- webhooks for entity change events, plus a Change Data Capture query operation for pull-based deltas
- Capabilities
- read · write · CDC · webhooks
- Rate limits
- subject to per-realm API request limits
How it works
How to connect Bill to QuickBooks — three steps, no code
Configure and sync within minutes, no code. Whether you sync 50k or 100M+ records, Stacksync handles the queues, infra, and plumbing. Integrations are non-invasive and need zero setup on your systems.
- 01
Connect your apps
Authenticate Bill and QuickBooks with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Bill
connected
QuickBooks
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Bill and QuickBooks objects to sync — Stacksync auto-detects both schemas, including custom fields where the platform exposes them. Sync to existing tables, or let Stacksync create new ones with ideal data types.
objects · Bill ⇄ QuickBooksCustomers 12,480Sales Orders 8,213Invoices 5,902Items 1,344 - 03
Map fields
Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.
Bill QuickBooksCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Bill and QuickBooks integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Bill and QuickBooks: authenticate both systems, choose the objects to sync (such as Bill's Bills and Vendors), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Bill: REST/JSON (BILL v3 Connect API). Authentication: Session-based: POST /v3/login with username, password, organizationId, and a developer key (devKey) returns a sessionId that is passed with the devKey as headers on every subsequent call; OAuth is available for partner/embedded apps. QuickBooks: REST API (QuickBooks Online). Authentication: OAuth 2.0. Stacksync manages authentication, retries, and rate limits on both sides.
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Bill: BILL exposes separate AP and AR object sets plus a distinct Spend & Expense API that uses its own token and a lower 60-calls-per-minute limit. QuickBooks: The API supports a SQL-like query language over entities (for example, SELECT statements against Invoice or Customer). Stacksync's field mapping accounts for these differences between Bill and QuickBooks without custom code.
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Stacksync is SOC 2 Type II and ISO 27001 certified with HIPAA BAA support. Data is encrypted in transit, and a zero-persistent-storage architecture means Bill and QuickBooks records are not retained after a sync operation.
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Stacksync pricing is usage-based and starts at $1,000/month, including the managed Bill and QuickBooks connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Bill–QuickBooks integration in-house.
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Yes — Stacksync ships production-grade connectors for both Bill and QuickBooks. The connectors handle authentication, schema detection, rate limits, and retries; you configure the sync, and Stacksync operates it.
SECURITY
Security teams trust Stacksync
As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers.
SOC 2 Type II
ISO 27001
HIPAA BAA
GDPR
CCPA
CSA STAR
DPF US-EU-UK-CH
→ SECURITY WITH BENEFITS
SSO & SCIM
Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more.
Alerts
Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options.
Secure connection options
Securely connects to your systems with:
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