Gusto vs. OnPay: Payroll Platform Decision Analysis
Question: Should a business use 'Gusto' or 'OnPay' for payroll, considering the cost per employee, support for multi-state tax filing, and integration with accounting software?
Prepared by the ChoiceScore Research Desk · Editor-approved for the curated library · Reviewed July 22, 2026
Direct answer
The choice between Gusto and OnPay depends on whether your business requires an expansive HR ecosystem or a singular focus on payroll and benefits administration. While both platforms share a $49 base fee and $6 per-employee fee, Gusto provides a broader suite of HR tools, whereas OnPay offers a simplified, unified experience.
Summary
Selecting between Gusto and OnPay requires a strategic evaluation of your business's operational trajectory. Both platforms provide full-service payroll, which includes the automation of tax filings and compliance management. Gusto offers a platform that integrates payroll with broader HR services, while OnPay emphasizes a streamlined approach to payroll, benefits, and HR administration. Because both vendors utilize a base fee of $49/month plus a $6 per-employee fee, the financial decision rests less on base-level cost parity and more on the specific feature-set requirements of your organization. This report analyzes these platforms based on their publicly stated pricing and service capabilities to assist in your selection process.
Choice Score breakdown
- Gusto 90/100 — Best for scaling businesses needing integrated HR/Benefits.
- OnPay 85/100 — Best for simplicity and streamlined payroll management.
Best for / Not best for
Best for
- Gusto: High-growth companies and businesses requiring integrated health and 401(k) benefit administration.
- OnPay: Small businesses seeking a simplified, flat-rate payroll experience and streamlined tax filing services.
- Both: Businesses requiring automated multi-state tax filing and integration with standard accounting software.
Not best for
- Gusto: Businesses with very simple payroll needs that may find an expansive HR suite unnecessary.
- OnPay: Enterprises that require highly complex, enterprise-level performance management systems.
Scenarios
- Small Business (5 Employees) (0.7% likely)
A startup with 5 employees requiring basic payroll and tax filing. These figures are illustrative and user-adjustable. This probability is an illustrative, user-adjustable scenario weight, not an empirical forecast. - Growing Business (20 Employees) (0.2% likely)
A company scaling to 20 employees, needing health benefits and 401(k) management. These figures are illustrative and user-adjustable. This probability is an illustrative, user-adjustable scenario weight, not an empirical forecast. - Niche/Seasonal Business (0.1% likely)
A business with seasonal workers requiring consistent tax handling. These figures are illustrative and user-adjustable. This probability is an illustrative, user-adjustable scenario weight, not an empirical forecast.
Calculations
| Metric | Result | Formula |
|---|---|---|
| Monthly Payroll Cost (5 Employees) | 79 USD/month | base_fee + (employee_count × cost_per_employee) |
| Annual Payroll Cost (10 Employees) | 1308 USD/year | (base_fee + (employee_count × cost_per_employee)) × 12 |
| Cost per Employee Variance | 0 USD | gusto_cost - onpay_cost |
Pros & cons
Pros
- Transparent pricing models: Both platforms utilize a $49 base fee and $6 per-employee fee.
- Full-service tax filing: Both platforms provide automated multi-state tax filing and compliance support.
- Accounting integration: Both platforms support integration with major accounting software like QuickBooks and Xero.
Cons
- Feature complexity: Gusto's advanced HR features may exceed the requirements of very small, simple businesses.
- Ecosystem variance: While both integrate with accounting software, Gusto features a broader library of third-party app integrations.
- Subscription scaling: Both platforms require monthly subscription commitments that scale directly with headcount.
Assumptions
- Base Pricing: 49 USD/month — Sourced from official pricing pages for both Gusto and OnPay.
- Per-Employee Fee: 6 USD/month — Standardized rate across both platforms for basic payroll services.
- Tax Filing: Included — Both platforms advertise full-service tax filing as a core feature.
- Illustrative scenario probability — Small Business (5 Employees): 0.7% — A user-adjustable modeling weight used to compare scenarios; it is not a measured probability or forecast.
- Illustrative scenario probability — Growing Business (20 Employees): 0.2% — A user-adjustable modeling weight used to compare scenarios; it is not a measured probability or forecast.
- Illustrative scenario probability — Niche/Seasonal Business: 0.1% — A user-adjustable modeling weight used to compare scenarios; it is not a measured probability or forecast.
Practical next steps
- Assess your current headcount and projected growth for the next 12 months.
- Determine if you require advanced HR features like performance reviews and document storage, or if you require streamlined, reliable payroll.
- Verify if your specific industry has specialized compliance needs.
- Sign up for a demo or trial on both platforms to test the UI against your existing accounting software workflow.
- Review the multi-state tax filing requirements specific to your employees' locations to ensure the platform supports all necessary jurisdictions.
Methodology
This analysis compares official pricing structures and stated service capabilities. Calculations are derived from the vendors' public base and per-employee fees to establish a financial baseline. The recommendation framework assesses the functional differences between Gusto's comprehensive HR-focused ecosystem and OnPay's streamlined service model. All financial projections are illustrative, user-adjustable scenario assumptions.
Sources
Sources support specific claims; they do not replace our analysis. Read the research and source standards.
FAQ
- Do both Gusto and OnPay handle multi-state payroll?
- Yes. Both platforms are designed to handle multi-state tax filing and compliance, automatically adjusting for local, state, and federal tax requirements.
- Which platform is better for accounting software integration?
- Both platforms integrate with major accounting software, including QuickBooks, Xero, and FreshBooks. While Gusto offers a larger library of third-party integrations, both platforms effectively handle core accounting syncs.
- Are there hidden fees in either platform?
- Both platforms are transparent about their $49 base fee and $6 per-employee fee. However, businesses should note that additional services, such as health insurance administration or specific add-ons, may incur separate costs depending on the chosen plan.
Related decisions
Disclaimers
Pricing and feature sets are subject to change by the vendors; always verify current terms on official websites before signing a contract.
This report is for informational purposes and does not constitute financial or tax advice; consult with a CPA regarding your specific business tax obligations.
All financial calculations and scenario probabilities are illustrative, user-adjustable modeling weights and should not be considered empirical data.