United States

Form W-4, in plain English.

Book a Workzoom walkthrough → 25+ years of HR and payroll production. Live in Canada, the US, and the Bahamas.

Form W-4, the Employee's Withholding Certificate, is how a US employee tells their employer how much federal income tax to withhold from each paycheque.

Read the full answer

The redesigned form no longer uses withholding allowances. Instead it captures filing status, multiple-job adjustments, dependents, and other income or deductions. Employers keep the form on file rather than submitting it. Workzoom applies the W-4 inputs on every pay run from the employee's own record.

Sources

How Form W-4 works.

A W-4 drives withholding only. It does not change what the employee ultimately owes, which is settled on their annual return. Employees can submit a new W-4 at any time, and the employer applies it to future pay runs rather than retroactively. When an employee provides no W-4, the employer must withhold as single with no adjustments. Because Workzoom holds the W-4 inputs on the single employee record, a mid-year change flows into the next pay run without a parallel spreadsheet.

Where Form W-4 goes wrong.

  1. The most common misread is treating the current W-4 like the old allowance-based version and hunting for a number of allowances that no longer exists.
  2. The second is the two-earner problem: households with multiple jobs routinely under-withhold because each employer calculates in isolation, and the multiple-jobs step on the form exists precisely to correct that.
  • 2000 Running payroll since Workzoom has run Canadian payroll for 25+ years.
  • Canadian data residency AWS Canada (ca-central-1). Canadian customer data stays in Canada.
  • SOC 2-aligned controls Encrypted at rest, role-based access, immutable audit logs.
  • Trusted in production County of Renfrew, Silvera for Seniors, and Cable Bahamas. Built for 50 to 5,000 employees.

In the product

How Form W-4 runs on Workzoom.

Form W-4 is part of the Workzoom Payroll Suite. Workzoom runs HR, workforce, and talent on a single employee record across ten countries: Canada, the United States, the Bahamas, Jamaica, Trinidad and Tobago, Barbados, Antigua and Barbuda, Anguilla, the Cayman Islands, and the United Kingdom. Full gross-to-net payroll runs live in Canada, the United States, and the Bahamas. Pricing starts at $4 per employee per suite per month.

See Workzoom in 30 minutes →

Keep reading

Related terms.

Questions about Form W-4

No. Employers keep Form W-4 on file and use it to calculate withholding. It is not submitted to the IRS as a routine filing, though the IRS can request it in specific circumstances.
As often as they need to. A new W-4 takes effect on future pay runs once the employer processes it, and it is not applied retroactively to earnings already paid.
The employer must withhold federal income tax as if the employee were single with no other adjustments, which usually results in higher withholding than the employee would otherwise choose.
Read more

More on Form W-4

Playbooks and teardowns from teams putting it into production.

Best Canadian Payroll Software 2026: 12 Options Compared
Payroll

Best Canadian Payroll Software 2026: 12 Options Compared

Find the best Canadian payroll software for your team: compare 12 options, pricing models, Quebec reporting, migration checks and Workzoom...

Read article →
Jamaica NIS Employer Registration: No Number, No Withholding
Caribbean

Jamaica NIS Employer Registration: No Number, No Withholding

TAJ handles Jamaica NIS employer registration, not the NIS office. The portal differs from the individual card login, and NHT filing follows...

Read article →
Best HR Software for Barbados Employers (2026 Guide)
Caribbean

Best HR Software for Barbados Employers (2026 Guide)

The best HR software for Barbados compliance: Employment Rights Act, NIS, BRA payroll. See how Workzoom handles the Caribbean workforce.

Read article →
Bahamas Employment Act: The Housekeeper's 46-Week Bill
Caribbean

Bahamas Employment Act: The Housekeeper's 46-Week Bill

A Nassau resort paid two weeks' severance for a ten-year employee. The Bahamas Employment Act and the Industrial Tribunal turned it into 46...

Read article →

Workzoom

Run HR, payroll, workforce, and talent on one platform.

$4 per employee per suite. 50 to 5,000 employees. Sprint-based, client-paced go-live.

Book a Walkthrough View Pricing