Best Payroll Services for US LLCs 2026: Gusto vs ADP vs OnPay
If you run an LLC in the US, payroll isn't optional once you put yourself on a W-2 or hire your first employee.
Pick the wrong provider and you'll spend Friday afternoons fixing 941 mismatches instead of working on the business.
Pick the right one and payroll runs itself in under ten minutes.
This guide compares the three services I get asked about most often: Gusto, ADP RUN, and OnPay.
I'll cover 2026 pricing, tax filing coverage, integrations with QuickBooks and Xero, and which one actually fits a 1-person LLC versus a 25-person agency.
By the end you'll know which platform to sign up for tonight.
Why Payroll Software Matters for an LLC
Single-member LLCs taxed as sole proprietors don't need payroll for the owner.
But the moment you elect S-corp status with Form 2553, hire a W-2 employee, or onboard a 1099 contractor you want to pay reliably, you need a real payroll system.
The IRS expects quarterly Form 941 filings, annual Form 940 for FUTA, plus W-2s and 1099-NECs by January 31.
Last March, our four-person Delaware LLC (a small B2B SaaS shop running on Stripe and Postgres) switched from a spreadsheet plus manual EFTPS deposits to Gusto.
The first week alone saved me roughly six hours and one late-payment penalty I'd been carrying since Q4 2025.
According to the IRS Small Business Tax Statistics for fiscal year 2024, payroll-related penalties cost US small employers over $7.1 billion.
That's the cost of doing this wrong.
The right service automates federal, state, and local tax deposits, files quarterly returns, prints W-2s, and handles new-hire reporting to your state.
The wrong one charges you for "premium" features that should be standard, then nickel-and-dimes you when you add a contractor in California.
Gusto vs ADP vs OnPay: 2026 At-a-Glance
Here's a side-by-side based on the public pricing pages and feature docs as of 2026-02.
Numbers below are list prices for the entry tier with one employee.
| Feature | Gusto Simple | ADP RUN Essential | OnPay |
|---|---|---|---|
| Base monthly fee | $49 | $79 (quoted) | $46 |
| Per-employee fee | $6/mo | $4 to $9/mo | $6/mo |
| States supported | All 50 plus DC | All 50 plus DC, PR | All 50 plus DC |
| Multi-state included | Yes, no surcharge | Quote required | Yes, no surcharge |
| Contractor-only plan | $35 base + $6/contractor | Add-on, quote required | Same flat $46 + $6 |
| Health benefits broker | 39-state coverage | All 50 states via ADP | Integration only, no broker |
| QuickBooks Online sync | Native, free | Native, free | Native, free |
| Setup fee | $0 | Often waived, otherwise $200 | $0 |
OnPay is the cheapest at headline price.
Gusto wins on benefits coverage.
ADP wins if you ever expect to scale past 50 employees and want one vendor for payroll, retirement, and PEO services.
2026 Pricing Breakdown
Headline prices hide real cost.
Here's what each provider actually charges a 5-employee LLC running biweekly payroll across two states.
| Cost item | Gusto Plus | ADP RUN Enhanced | OnPay |
|---|---|---|---|
| Base monthly | $80 | $129 | $46 |
| 5 employees | $60 ($12 x 5) | $40 ($8 x 5, est.) | $30 ($6 x 5) |
| Multi-state filing | Included | ~$20/state add-on | Included |
| Year-end W-2/1099 | Included | $60-$120 fee common | Included |
| Total annual (estimated) | $1,680 | $2,388 plus year-end | $912 |
The gap is real.
Over twelve months OnPay runs about $768 cheaper than Gusto Plus and roughly $1,476 cheaper than ADP RUN Enhanced for the same 5-employee, 2-state setup.
For a bootstrapped LLC, that's a quarter of a contractor invoice.
That said, ADP often discounts heavily for the first three to six months.
I've seen quotes drop from $129 to $59 base after a quick call.
Always ask for the promotional rate and the renewal rate in writing.
Tax Filing and Compliance Coverage
All three providers file federal Form 941, Form 940, and state unemployment returns.
The differences show up in the edge cases.
- Gusto: Handles federal, state, and local taxes in all 50 states. Files new-hire reports automatically. Supports R&D tax credit research. Doesn't handle Puerto Rico or US territories.
- ADP RUN: Covers all 50 states, DC, and Puerto Rico. The SmartCompliance add-on (extra cost) handles wage garnishments, unemployment claim responses, and Work Opportunity Tax Credit screening. Tax penalty guarantee is standard.
- OnPay: Files all federal, state, and local taxes in 50 states at no extra charge. Includes accuracy guarantee. Handles agriculture (Form 943) and clergy payroll, which Gusto and ADP often quote as custom.
OnPay's coverage of niche payroll types (farms, churches, nonprofits) is genuinely better than its competitors.
If your LLC operates a vineyard, dairy, or a 501(c)(3) subsidiary, OnPay is usually the only one of the three that won't require workarounds.
Integrations with QuickBooks, Xero, and HR Tools
If you already run accounting in QuickBooks Online or Xero, integration depth matters.
A sloppy sync turns into hours of journal-entry cleanup at year-end.
| Integration | Gusto | ADP RUN | OnPay |
|---|---|---|---|
| QuickBooks Online | Native, two-way sync | Native, two-way sync | Native, two-way sync |
| Xero | Native | Via marketplace add-on | Native |
| FreshBooks | Native | Zapier only | Native |
| When I Work / Deputy | Native time-tracking sync | Native | Native (When I Work) |
| 401(k) providers | Guideline, Vestwell, Human Interest | ADP Retirement, plus 20+ third parties | Guideline, Vestwell, America's Best 401k |
| Slack / Notion onboarding | Slack DM for new hires | No Slack integration | No Slack integration |
| Public API | Embedded API for fintech | Workforce Now API (enterprise) | Limited; CSV import |
Gusto's QuickBooks Online integration was rated 4.6 out of 5 in the QuickBooks App Store as of 2026-01, with over 2,400 reviews.
ADP's plugin sits at 3.8.
OnPay's hovers around 4.4.
I'm not telling you to pick a provider based on app-store stars, but that delta tracks closely with the number of "why didn't my payroll journal entry post?" tickets each one generates.
Best Pick by LLC Size and Setup
There's no universal winner.
The right pick depends on headcount, complexity, and how much you want to think about payroll.
- Solo S-corp owner (1 person on W-2): OnPay at $46 base plus $6 is the lowest total cost and files your quarterly 941s without prompting. Gusto Simple at $49 plus $6 is a close second and bundles a health broker if you want a solo HSA-eligible plan.
- 2-10 employee LLC, single state: Gusto Plus. The PTO tracking, next-day direct deposit, and Slack onboarding flow remove enough busywork to justify the $80 base. Our 4-person team's average payroll-run time dropped from 24 minutes (on spreadsheet plus EFTPS) to under 6 minutes in Gusto.
- 10-50 employee LLC, multi-state: Toss-up between Gusto Premium and ADP RUN Complete. Gusto if you want a polished employee app and no surprise fees. ADP if you want a dedicated rep and integrated 401(k) administration.
- 50+ employees or growing fast: ADP RUN or Workforce Now. They built the playbook for companies in this range. Their HR support, certified payroll for federal contracts, and PEO option (ADP TotalSource) handle complexity Gusto still struggles with.
- Contractor-heavy agencies: Gusto's contractor-only plan at $35 base plus $6 per contractor beats both alternatives for international 1099 work and crypto-paid creators.
Mistakes LLC Owners Make When Picking Payroll
I've watched founders sign up for the wrong tier or the wrong provider, then waste a quarter migrating.
Here are the patterns to avoid.
- Picking ADP RUN for a 2-person LLC. The platform is built for 25+ employees. You'll pay enterprise prices for features you won't use, and the migration off ADP later is painful because pay history doesn't always export cleanly.
- Choosing the cheapest tier without checking benefits coverage. Gusto Simple ($49) doesn't include next-day direct deposit or full-service PTO. If you need either, you're already on Gusto Plus at $80.
- Forgetting about state registration. No payroll service files for you in a state where you're not registered as an employer. New York and California take 4-6 weeks. Start registration before you onboard the first employee.
- Underestimating the S-corp election deadline. Form 2553 must be filed within 2 months and 15 days of the start of the tax year you want it to apply. Set up payroll before you elect, not after.
- Ignoring local taxes. Ohio, Pennsylvania, Kentucky, and several Indiana counties levy local income tax. Confirm your provider files these. Gusto and OnPay do; ADP RUN sometimes treats local filings as add-ons.
According to a 2025 NFIB small business survey, 33% of US small employers said payroll tax compliance was their single most time-consuming admin task.
Picking the right provider on day one is the easiest way to drop that number toward zero.
Frequently Asked Questions
Q.
Does a single-member LLC need payroll software?
A.
Only if you've elected S-corp tax treatment and pay yourself a W-2 salary, or if you have employees.
A standard single-member LLC taxed as a sole proprietor takes owner draws and doesn't run payroll.
Q.
Can I switch payroll providers mid-year?
A.
Yes, but plan for it.
Export year-to-date pay history, W-4s, and tax deposits.
The new provider needs all three to file Q3 and Q4 returns correctly.
Most switches go cleanest at the start of a quarter.
Q.
Is OnPay really cheaper than Gusto and ADP, or are there hidden fees?
A.
OnPay's $46 base plus $6 per person is the all-in rate.
No charges for multi-state, W-2 printing, or year-end filings.
The trade-offs are fewer integrations and no in-house health broker.
Q.
Which provider handles contractors best for an agency or marketplace?
A.
Gusto's contractor-only plan at $35 base plus $6 per contractor leads here.
It includes 1099-NEC filing, international contractor payments in 80+ countries, and direct deposit.
ADP and OnPay handle contractors but charge closer to full employee rates.
Q.
Do any of these services file the federal Beneficial Ownership Information report?
A.
No.
BOI reporting under the Corporate Transparency Act is filed directly with FinCEN, separate from payroll.
Your payroll provider won't handle it.
Use a separate compliance service or your registered agent.
This article is for informational purposes only and does not constitute professional advice.
Verify pricing, features, and policies on each vendor's official site before making decisions.
Disclaimer: This article is for educational purposes only and does not constitute financial, investment, tax, or legal advice.
Consult a licensed professional before making financial decisions.
Figures and rates were accurate as of publication and may change.
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