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Startups

Payroll services for startups

Payroll is the largest thing a startup spends money on and the one with the least tolerance for error. It also unlocks the R&D credit.

Parag Jain, CPA
Parag Jain, CPAFounder, Zinance·Last updated August 2026·6 min read

Summarize this article

At a glance

Remote hiring
Creates state obligationsOne employee can trigger registration in their state
Misclassification
Expensive to unwindBack taxes, penalties and interest
R&D payroll credit
Up to $500,000 a yearApplied against employer payroll tax

For most startups payroll is the largest line in the budget and the one where mistakes compound quietly. It is also, unusually, a place where a tax credit can turn into actual cash.

Every remote hire is a state decision

Hiring one engineer in another state generally creates obligations in that state: withholding registration, unemployment insurance, and sometimes local taxes on top. It can also create income tax nexus for the company itself.

The pattern we see

A company hires remotely across six states in a year, registers in none of them, and discovers the gap during diligence. Unwinding it means back filings and penalties in six jurisdictions at once, during a fundraise. Registering as you hire costs very little; catching up does not.

Contractor or employee is not your choice

It is determined by the working relationship — control over how and when the work is done, whether it is core to your business, exclusivity, tooling. Getting it wrong means back payroll taxes, penalties and interest, and states have become markedly more active on it.

The credit that pays your payroll tax

A qualified small business can apply the federal research credit against employer payroll tax rather than income tax, up to $500,000 a year. Applied first against the employer share of Social Security up to $250,000 per quarter, with the remainder against Medicare.

  • Gross receipts under $5 million for the tax year.
  • No gross receipts before the five-year period ending with this year.
  • Elected on a timely-filed original return — it cannot be added later by amendment.

Our R&D credit calculator estimates the amount. Payroll has to be set up to actually take it, which is where it tends to fall down.

Equity is a payroll event

Option exercises and RSU vesting create reportable income and withholding obligations that run through payroll, not around it. Companies that treat equity as a cap-table matter discover the gap at year end when the W-2s are wrong.

What we do for startups

Payroll run properly across states, registrations kept ahead of hiring, classification reviewed before it becomes a liability, and the R&D payroll credit actually claimed rather than merely estimated.

Frequently asked questions

We hired someone in another state. What do we need to do?+
Generally register for withholding and unemployment insurance in that state, and check for local taxes. It may also create income tax nexus for the company. It is quick to do at the point of hire and slow to fix in arrears.
Can we just pay everyone as contractors?+
Not if the relationship is really employment. Classification is determined by the facts of the working relationship, not by the paperwork, and misclassification brings back payroll taxes, penalties and interest.
How does the R&D credit apply to payroll?+
A qualified small business can elect to apply up to $500,000 of research credit against employer payroll tax instead of income tax — first against the employer Social Security share up to $250,000 per quarter, then Medicare. It must be elected on a timely-filed original return.

Numbers you can actually trust

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