Payroll for Small Businesses — ADP Through ZenBusiness
When you hire your first employee, you have a legal obligation to withhold payroll taxes, file quarterly returns, and issue Forms W-2 annually. Doing this manually is time-consuming and carries significant penalty risk. ZenBusiness recommends RUN Powered by ADP — a payroll platform built for businesses with 1–49 employees that handles tax calculations, filings, and deposits automatically. ZenBusiness customers can request a connection to ADP directly from their dashboard, and may be eligible for promotional pricing.
Why Payroll Is More Than Just Issuing Paychecks
Many new employers underestimate the scope of payroll compliance. Every time you pay an employee, the law requires:
Per paycheck:
- Calculate and withhold federal income tax (based on Form W-4)
- Withhold employee Social Security (6.2%) and Medicare (1.45%)
- Pay employer's matching Social Security (6.2%) and Medicare (1.45%)
- Calculate and withhold state income tax (most states)
- Deposit withheld taxes with the IRS on schedule (semi-weekly or monthly)
Quarterly:
- File Form 941 (federal payroll tax return)
- File state quarterly wage reports
Annually:
- File Form 940 (federal unemployment tax)
- Issue Form W-2 to every employee by January 31
- File W-2s with the Social Security Administration
Penalties for getting it wrong:
- Late deposit penalty: 2–15% of the amount due
- Trust Fund Recovery Penalty for unpaid payroll taxes: 100% of the unpaid amount (assessed personally against the business owner)
- Late Form W-2 penalties: $60–$310 per form
- Misclassifying an employee as a contractor: back taxes + 20–100% penalties
Manual payroll typically takes 20–30 hours per month for a small team. Payroll software reduces this to 15 minutes or less per pay period for most users.
RUN Powered by ADP — What It Is
RUN Powered by ADP is an all-in-one payroll and HR platform designed specifically for businesses with 1–49 employees. It's one of the most widely used small business payroll platforms in the U.S. and was rated the #1 Small Business Software by G2 two years in a row (2025 and 2026).
What RUN handles automatically:
- Payroll processing (weekly, bi-weekly, semi-monthly, or monthly)
- Federal, state, and local tax calculations
- Tax deposits to the IRS and state agencies
- Form 941 (quarterly) and Form 940 (annual) filing
- W-2 and W-3 generation and e-filing with the SSA
- 1099-NEC generation for contractors (if applicable)
- Multi-state payroll for remote employees
- AI-powered error detection that flags unusual amounts before processing
Also included:
- 24/7 support from real payroll professionals (phone, email, chat)
- Employee self-service portal and mobile app (employees access their own pay stubs and W-2s)
- Direct deposit
- Accounting software integrations (QuickBooks, Xero, etc.)
ADP Plan Options
RUN Powered by ADP offers four plan tiers, all including core payroll features:
| Plan | Includes | Best For |
|---|---|---|
| Essential Payroll | Payroll processing, tax filing, W-2s, direct deposit, employee self-service, 24/7 support | First-time employers, 1–5 employees |
| Enhanced Payroll | Everything in Essential + ZipRecruiter® integration, background checks, SUI management, job costing | Growing businesses hiring regularly |
| Complete Payroll & HR Plus | Everything in Enhanced + HR HelpDesk, Employee Handbook Wizard, HR tracking | Businesses dealing with HR issues |
| HR Pro Payroll & HR | Everything in Complete + applicant tracking, legal assistance (via Upnetic), learning management | HR-intensive operations |
All plans include multi-state payroll capability.
Pricing: Personalized based on your employee count, plan tier, and any add-ons. Contact ADP for a custom quote. ZenBusiness customers may be eligible for a promotional free offer (terms apply).
How to Get Started Through ZenBusiness
RUN Powered by ADP is not set up through your ZenBusiness dashboard directly — you connect with ADP's team who handle onboarding:
- Request information — Ask through your ZenBusiness dashboard (look for the Payroll or ADP option) or contact our support team
- ADP representative contacts you — An ADP rep reaches out to discuss your needs, employee count, and desired pay schedule
- Receive a custom quote — ADP provides personalized pricing based on your specifics
- Review promotional eligibility — ZenBusiness customers may qualify for promotional pricing (terms apply)
- Sign up and onboard — ADP's team walks you through setup, which takes approximately one hour with the right information ready
What to have ready for the ADP setup call:
- Your EIN (required — you cannot process payroll without it)
- Business bank account information for payroll funding
- Employee Forms W-4 (filled out before their first paycheck)
- Employee Forms I-9 (employment eligibility verification)
- Your desired pay schedule (weekly, bi-weekly, semi-monthly, or monthly)
- Number of employees and states where they work
Employees vs. Independent Contractors
Before setting up payroll, you must correctly classify the people who work for your business. The classification determines your tax obligations.
Employees — You control how, when, and where they work. You pay employer payroll taxes, withhold employee taxes, and issue Form W-2.
Independent contractors — They control how they work; you only control the result. No payroll taxes; you just pay them and issue Form 1099-NEC if you pay $600+ in a year.
The IRS's three-factor test:
1. Behavioral control: Do you control how the work is done (not just what result is needed)?
2. Financial control: Do you control the economic aspects (do they work for other clients? own their own tools? can they profit or lose?)
3. Relationship: Is the relationship ongoing? Do you provide benefits? Is the work core to your business?
The more "yes" answers in the employee direction, the more likely the IRS views the person as an employee. Misclassifying employees as contractors carries penalties of 20–100% of unpaid taxes plus personal liability. When in doubt, classify as an employee or consult a payroll attorney.
What Happens If You Don't Set Up Payroll Correctly
The IRS and state agencies take payroll compliance seriously because payroll taxes fund Social Security, Medicare, and unemployment programs:
| Violation | Penalty |
|---|---|
| Late payroll tax deposit | 2–15% of amount due depending on how late |
| Failure to pay payroll taxes | Up to 100% of tax due (Trust Fund Recovery Penalty, assessed personally) |
| Late Form 941 filing | Up to 25% of unpaid tax |
| Late W-2 to employee | $60–$310 per form depending on how late |
| Worker misclassification | 20% of wages + 100% of FICA taxes (employer and employee share) |
The Trust Fund Recovery Penalty is particularly severe — it can be assessed personally against business owners, officers, or anyone with authority over payroll, even if the business closes.
Frequently Asked Questions
Do I need payroll software for just one employee?
Yes, for nearly all situations. The tax calculation requirements are the same for one employee as for 100. You must withhold taxes correctly, deposit on schedule, and file quarterly returns. Doing this manually for even one employee takes significant time and carries meaningful error risk. Payroll software or services typically cost $80–150/month and are worth it versus the penalty exposure of errors.
When do I need to start setting up payroll?
Before the first paycheck. You need your EIN before you can process payroll. Some states also require you to register as a state employer before your first paycheck — check your state's Department of Labor. Don't rush the first hire and then realize you need to pay someone before your payroll is set up.
Can I just pay contractors instead of employees to avoid payroll?
You can use contractors, but only if the classification is legitimate. Using contractor status to avoid payroll taxes on what are functionally employees is one of the most audited areas by the IRS. The classification depends on facts, not what you call the person in a contract. If someone works exclusively for you, follows your direction on how to do the work, and is doing your core business function, they're very likely an employee regardless of what your agreement says.
Does ADP handle multi-state payroll for remote employees?
Yes. Multi-state payroll is included in all RUN Powered by ADP plans. If you have employees working in different states, ADP calculates state-specific withholding and files state quarterly reports for each state. Note that you may need to register as an employer in each state where you have employees — ADP can assist with state registration filings (for additional fees).
What's included in the ADP promotional offer for ZenBusiness customers?
Promotional offers vary and are confirmed during your consultation with an ADP representative. They typically apply to payroll service fees for eligible new customers for a specified period. State filing fees and optional add-on services are generally not included in promotional pricing. Contact ZenBusiness or ADP directly to confirm current offer details.
Is ADP directly integrated into my ZenBusiness dashboard?
No — ADP is a separate service with its own platform, billing, and support. Your payroll is managed in the ADP system. ZenBusiness facilitates the connection by helping you get in touch with ADP's team, and you may receive a promotional rate as a ZenBusiness customer, but day-to-day payroll operations happen in ADP's own interface.
Get started with payroll: Contact ZenBusiness support, or look for the Payroll/ADP option in your ZenBusiness dashboard.