Payroll SoftwareOnPay Review
Flat, transparent pricing with unlimited pay runs and full-service tax filing for small firms.
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What is OnPay?
OnPay is a full-service payroll platform built around flat, transparent pricing — a base fee plus a simple per-person charge — which makes it easy for a small firm to predict what payroll will cost each month. It runs payroll, files taxes, and handles both W-2 and 1099 workers.
For a practice, the value is in the details: unlimited monthly pay runs (so off-cycle or bonus payments don't cost extra), full-service tax filing backed by an accuracy guarantee, and multi-state support for firms with remote staff. It's a strong-value pick for firms that don't need a heavy HR suite.
This is an independent editorial overview, not legal or accounting advice, and inclusion here is not an attorney endorsement of the product. OnPay is general business-payroll software — it does not handle client-trust or IOLTA accounting, so your firm must keep client funds in dedicated legal trust-accounting software and follow your state bar's IOLTA rules.
OnPay key features
Flat, transparent pricing
One base fee plus a per-person charge, so a small firm can predict its monthly payroll cost.
Unlimited monthly pay runs
Run payroll as often as needed — off-cycle or bonus runs don't add extra fees.
Full-service tax filing
Calculates, files, and pays payroll taxes, backed by an accuracy guarantee on filings.
Multi-state payroll
Supports paying staff across multiple states, helpful for firms with remote or out-of-state associates.
Pros
- Flat, predictable pricing with no per-run fees
- Unlimited pay runs each month
- Full-service tax filing with an accuracy guarantee
- Handles W-2 staff and 1099 contractors across states
Cons
- Lighter HR and benefits tooling than larger providers
- Does not do legal trust or IOLTA accounting — client funds still need dedicated trust software
OnPay pricing
OnPay uses a flat model: a single monthly base fee plus a per-person charge, with full-service tax filing included. Confirm current pricing on OnPay's site.
Best for
- Small firms that want predictable, flat payroll pricing
- Practices that run frequent or off-cycle pay runs
- Firms paying W-2 staff and 1099 of-counsel across states
How OnPay compares
See OnPay ranked side-by-side against the alternatives in our independent comparison.
OnPay FAQ
Is OnPay good for a law firm?
Yes — its flat pricing, unlimited pay runs, and full-service tax filing make it a strong value for a small firm that doesn't need a heavy HR suite. It is business payroll only, so client-trust and IOLTA accounting still require dedicated legal trust-accounting software. Confirm current pricing on OnPay's site.
Is OnPay worth it?
For a small or mid-size firm that wants predictable costs and full-service tax filing, OnPay is often good value because there are no extra per-run fees. Firms needing extensive HR or benefits administration may prefer a larger provider.
How much does OnPay cost?
OnPay charges a flat monthly base fee plus a per-person amount, with tax filing included in that price. Check the current rate directly, as pricing can change.
Top alternatives to OnPay
The highest-ranked law-firm payroll software options worth comparing before you decide.
Gusto
Full-service payroll with automatic tax filing and benefits, built for small teams that want it simple.
ADP
Scalable payroll and HR that grows with the firm, backed by deep compliance tooling and support.
The bottom line
OnPay earns a 4.4/5 in our editorial review. If it fits your needs, you can visit it directly below — or see how it stacks up against the alternatives first.
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Important disclosure
This review is produced by the AttorneyReview editorial team for general informational purposes only and does not constitute legal advice. Despite the “AttorneyReview” name, this platform does not provide legal advice or legal validation of any company, product, or service, and attorneys do not review, endorse, or certify OnPay or any provider listed.
Affiliate disclosure. AttorneyReview is reader-supported and may receive compensation when you sign up with the provider via outbound links on this page. Our assessment is an independent editorial judgment and is not altered by compensation.
Methodology. Our rating reflects an editorial assessment of features, value, ease of use, and reputation, reviewed as of June 2026 and subject to change. Confirm current features and pricing on OnPay's own site before purchasing.
