InvoiceQuickly + Gusto: Contractor Invoicing Meets Payroll
If you pay contractors through Gusto, their invoices should flow there automatically. Contractors submit invoices via InvoiceQuickly — you approve them, and the payment data syncs to Gusto for processing, tax tracking, and year-end 1099 generation. One workflow, no double entry.
How It Works
Connect Gusto
Link your Gusto employer account to InvoiceQuickly and map contractor profiles.
Contractors submit invoices
Contractors create invoices in InvoiceQuickly (free for them) with work descriptions and amounts.
You approve
Review and approve contractor invoices in InvoiceQuickly's dashboard.
Payment syncs to Gusto
Approved invoice amounts flow to Gusto for contractor payment processing and tax reporting.
Key Benefits
- Contractor invoices flow directly into Gusto payroll processing
- Automatic 1099 data accumulation from approved invoices
- Contractors get free professional invoicing — you get organized records
- Approval workflow ensures only reviewed invoices get paid
- Year-end tax reporting simplified with complete invoice history
Best For
- Businesses paying multiple contractors through Gusto who need invoice documentation
- Agencies using contractors for client work with project-based invoicing
- Companies needing 1099-ready records from contractor invoice submissions
Setting it up
Setup takes 5-15 minutes depending on whether you have an existing Gusto account. Prerequisites: active Gusto account with admin access, your InvoiceQuickly workspace, and the relevant API permissions or OAuth authorization. From Settings → Integrations → Gusto, follow the connection flow (OAuth for most, API key for some specialized tools). The integration syncs bidirectionally where supported — invoice creation in one system reflects in the other. Initial setup includes mapping data fields between systems (customers, products, payment methods, tax codes).
Best practices
Define one source of truth for customer data
When you connect Gusto, decide which system owns customer records. Most teams keep their primary CRM/ERP as the source of truth and let invoices sync into it. This prevents duplicate customer creation and reconciliation issues.
Test with a small batch before production rollout
Before syncing all historical data or going live for daily operations, test with 5-10 invoices to verify field mapping, tax handling, and payment workflow. Adjust configuration based on test results.
Reconcile sync status weekly
Network failures, OAuth expirations, and edge cases occasionally cause sync gaps. A weekly reconciliation (compare invoice counts in both systems) catches issues early before they accumulate.
Document the integration scope for your team
Write a brief internal doc (one page) covering: which workflows use the Gusto integration, who owns reconciliation, what to do when sync fails. Reduces support overhead as the team grows.
Common issues
Sync stops after working initially
Most common cause: OAuth token expired (typically 60-100 days depending on the Gusto platform). Reconnect via Settings → Integrations → Gusto. Set a reminder to refresh authorization every 60 days for critical integrations.
Field mapping creates duplicate or missing data
During initial setup, the field mapping between Gusto and InvoiceQuickly may not catch every edge case. Adjust mapping in Settings → Integrations → Gusto → Field Mapping. Re-sync affected records after fixing.
Rate-limit errors during high-volume operations
Gusto APIs typically allow 100-1000 calls per minute. Bulk operations (importing all customers, syncing 1000+ historical invoices) can hit rate limits. InvoiceQuickly handles backoff automatically; if you see persistent errors, retry during off-peak hours.
Last verified: April 2026
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Calculate Your SavingsFrequently Asked Questions
Do contractors need an InvoiceQuickly account?
Contractors can create invoices for free on InvoiceQuickly without any account needed. They just submit and you approve.
Does it handle 1099 reporting?
Invoice data syncs to Gusto, which handles 1099 generation. All approved contractor payments are tracked for year-end reporting.
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