10Key
Employment planning

W2 vs 1099 calculator for CPA firms and tax advisors.

Use this calculator to compare employee and contractor compensation so CPA firms can explain tax burden, take-home pay, and planning tradeoffs more clearly.

Built for accountants who need to turn compensation questions into fast, client-ready advisory conversations.

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Tool walkthrough

W2 vs 1099, Key Tax Tradeoffs

Who it's for

Independent CPAs, advisory accountants, and firms helping business owners or workers compare payroll and contractor structures.

When to use it

Use it during compensation planning, estimated-tax conversations, payroll restructuring, or when a client is deciding how to get paid.

Planning outcome

The output helps firms explain take-home pay, tax drag, and which structure creates the cleaner client result.

Inputs and outputs

A clearer way to move from client inputs to planning outputs.

The page mirrors how firms think through the work: what goes in, what comes out, and what the client needs help understanding.

Typical inputs
Compensation amount and payment structure
Filing assumptions and withholding context
Contractor expense or benefit assumptions
State-specific tax planning inputs
What firms get back
Side-by-side tax burden comparison
Take-home pay and savings outcomes
Withholding and estimated-tax planning context
A cleaner recommendation for the client conversation
Worked scenario

A business owner wants to compare payroll treatment against contractor pay.

Instead of building two separate spreadsheets, the accountant can run both paths in one place and walk the client through the actual difference in taxes, take-home pay, and next steps.

Open in workspace
1

Show the client which structure creates the stronger after-tax outcome.

2

Explain where withholding, self-employment tax, and benefit assumptions change the decision.

3

Move from the calculation to a recommendation without rebuilding the analysis elsewhere.

FAQ

Questions firms ask before using this calculator.

Is this page for business owners or for CPA firms?

Both can use it, but the page is written for CPA firms and advisors who want a faster way to model compensation scenarios during live client work.

Does 10Key replace payroll or tax preparation software?

No. The calculator is built for planning conversations and tax modeling, not as a replacement for payroll systems or return preparation tools.

What happens after the comparison is finished?

Inside the 10Key workspace, firms can save the scenario, keep it organized with client work, and upgrade into exports and branded delivery when needed.