Quarterly Payroll Tax Compliance Checklist

Export the quarterly wage and tax register from Gusto, ADP, Paychex, or Rippling. Confirm the report covers all three months in the quarter and that the run includes any off-cycle bonuses, terminations, and third-party sick pay adjustments.

Pull the W-4 / state withholding exception report. New hires this quarter must have a 2020+ W-4 on file; mid-year changes for marriage, dependents, or multi-state moves are common gotchas. States with their own withholding form (CA DE-4, NY IT-2104, etc.) need a separate review.

Run the contractor list against the IRS common-law factors and any state ABC test (CA, NJ, MA). Flag any 1099 worker who is now functionally a W-2 employee — reclassification mid-year requires a corrected W-2 and amended 941s, so catching it during the quarterly cycle is much cheaper than at year-end.

For each reclassified worker, set up the W-2 record in payroll, capture retroactive withholding owed, and document whether the firm will use Section 530 relief or VCSP. Notify the partner — these adjustments can change quarterly tax liability and may require amending prior 941s.

Tie the payroll register's gross wages by department to the GL salary and wage accounts in QBO, Xero, or Intacct. Variances usually trace to journal entries posted directly to wage accounts (bypassing the payroll feed) or to manual bonuses recorded outside the payroll system.

The payroll clearing account should zero out after each pay date. Outstanding balances point to ACH returns, voided checks not reversed in payroll, or net-pay rounding errors. Document and clear any line older than 30 days before filing.

Personal use of company auto, group-term life over $50K, S-corp shareholder health insurance, and HSA employer contributions all flow through payroll as imputed income. Missing them now means a year-end W-2c scramble and box 12 corrections.

Download the EFTPS payment history for the quarter and match each 941 deposit to the corresponding pay date. Federal schedule: pay dates Wed/Thu/Fri deposit by following Wed; Sat/Sun/Mon/Tue deposit by following Fri. Bank holidays push deadlines forward and trip up first-time filers.

Apply the IRC 6656 tiered penalty: 2% (1-5 days late), 5% (6-15 days), 10% (16+ days), 15% (after IRS notice). Document each late deposit with date, amount, and tier in the workpaper. If first-time abatement applies, prepare the request now rather than waiting for the IRS notice.

Review the 12-month lookback ending June 30 to set the upcoming year's deposit schedule. $50K threshold separates monthly from semiweekly depositors. The $100K next-day rule applies regardless of schedule.

Populate Form 941 from the wage register: line 2 (wages), line 3 (FIT withheld), line 5a-5d (FICA wages and tips), and Schedule B for semiweekly depositors. Most payroll platforms generate the form, but staff should still tie line by line to the source register before submission.

Tie 941 line 2 to the wage register total and 5a/5c to FICA wages. Differences typically come from pre-tax deductions (Section 125, 401(k)) treated inconsistently or from third-party sick pay. Document the reconciling items as part of the workpaper.

Examples by state: CA DE-9 / DE-9C, NY NYS-45, IL IL-941, PA W-3. Multi-state employers need a return per work-state, and remote employees may have triggered a new state registration this quarter — confirm registration status before filing.

SUTA wage bases vary widely (WA $72,800; CA $7,000). Apply the experience rate received on the most recent state notice — using the prior year's rate is one of the most common quarterly errors. Reconcile SUTA wages to the federal wage base for FUTA Schedule A credit reduction tracking.

E-file through the payroll platform's IRS MeF integration or through a third-party reporting agent. Capture the IRS submission ID and acceptance acknowledgment — a submission without an ack is not a filing.

Schedule the EFTPS payment for the 941 balance and any current-quarter shortfall identified during reconciliation. Save the EFT acknowledgment number; the IRS resolves apparent missed payments using this number, not the filing.

State portals (CA e-Services for Business, NY Online Services, etc.) each have their own login and submission flow. Capture confirmation numbers per state and per return type — withholding and SUTA are usually separate filings even when the same portal hosts both.

Save the wage register, 941 PDF, state returns, EFTPS confirmations, and reconciliation workpaper to SmartVault, ShareFile, or TaxDome under the client's quarterly tax folder. IRS retention minimum is 4 years from the later of due date or payment date; many firms keep 7.

Partner or controller reviews the package, signs off on the 941 reconciliation, and notes any issues to carry into the next quarter (e.g., new states, classification changes, deposit-schedule shifts).