Calculating the True Cost ofGusto vs Custom.
Calculate the true 5-year cost of Gusto payroll vs custom payroll integration. Growing companies pay $12K–$36K/year in per-employee fees.
Why Companies Outgrow Gusto
Per-employee pricing means every new hire increases your software bill before generating revenue
Benefits administration features are gated behind premium tiers
Limited international payroll support forces multi-vendor setups
Tax filing automation breaks frequently with state-specific edge cases
Feature Matrix: Custom vs Gusto
| Capability | Custom Architecture | Gusto |
|---|---|---|
| Per-Employee Cost | Zero after build | $6–$12/employee/month |
| Payroll Processing | Custom rules for your pay structure | Automated with limitations |
| Tax Compliance | Requires integration with tax API | Automated federal and state |
| Benefits Admin | Custom benefits portal | Built-in on premium plans |
| Scalability | Fixed cost regardless of headcount | Cost scales linearly with headcount |
Frequently Asked Questions
How much does Gusto cost per year?
Gusto Simple starts at $40/month base + $6/employee/month. Premium is $80/month base + $12/employee/month. For 100 employees: $12,000–$36,000/year depending on tier.
Can I replace Gusto with custom payroll software?
Yes, by building a custom HR portal that integrates with payroll APIs like Check or Zeal. The custom build costs $25,000 with $2,000/year maintenance. Over 5 years: $33,000 vs $60,000–$180,000 for Gusto.
What are the hidden costs of Gusto?
Beyond per-employee fees, Gusto charges extra for contractor payments, state tax registration, health insurance administration, and 401(k) management. These add-ons can increase total costs by 30-50%.
Stop Renting Core Infrastructure
Download the complete Gusto escape blueprint. See exactly how startup to $100M+ companies convert a recurring SaaS tax into a proprietary capital asset.