Payroll for a Federal Contractor: SCA Wages and DCAA-Ready Timekeeping

An SCA wage determination sets minimum hourly rates and fringe benefit amounts for specific labor categories in a specific locality, attached to a specific contract, and a contractor with multiple SCA contracts may be operating under several different wage determinations simultaneously, each requiring its own compliance check.

Map each employee working on an SCA contract to their correct labor category and the applicable wage determination for that contract's location, and confirm your payroll platform can pay at or above that rate, including the fringe benefit component, which can be satisfied through actual benefits, cash equivalent, or a combination.

SCA fringe requirements can be met through bona fide benefits like health insurance and retirement contributions, but the value of what you're already providing needs to be calculated against the specific fringe rate in the wage determination, and any shortfall generally needs to be paid as additional cash wages. Assuming your standard benefits package automatically covers the fringe requirement without doing this calculation is a common compliance gap.

This calculation needs to happen per employee per contract, since an employee's existing benefits value doesn't automatically scale to match every wage determination's specific fringe rate.

Gusto can work for a small subcontractor with one or two SCA labor categories and straightforward W-2 pay. Its base payroll math handles standard wage and hour compliance well, though SCA-specific wage determination management sits outside what either platform runs natively.

Rippling's more configurable pay categories and broader reporting tend to help more once a contractor is managing multiple contracts with different wage determinations and labor categories simultaneously, and needs to demonstrate compliance across a larger, more complex workforce. Neither platform is a substitute for dedicated government contract compliance software once your contract portfolio reaches real complexity, but the underlying payroll needs to be clean either way.

A defensible timekeeping system for cost-reimbursable contracts generally requires employees to record their own time daily, by contract and task code, with any correction made through a visible, auditable process rather than a silent edit. An employee filling out a full week's timesheet from memory on Friday afternoon is exactly the pattern a DCAA audit flags as unreliable.

Confirm your time tracking setup, whether built into your payroll platform or a separate system feeding it, supports daily entry with a real audit trail, since retrofitting this discipline after a contract award, rather than having it in place before you bid, is a much harder position to be in.

Say an engineer splits their week between two different federal contracts, one under an SCA wage determination and one that isn't. Their SCA-contract hours need to be paid at least the determination's rate with fringe accounted for, while their non-SCA hours follow standard pay, and both need to be tracked separately with clear documentation of which hours applied to which contract, since that split feeds both payroll compliance and cost allocation for billing.

Getting this split wrong doesn't just risk an underpayment claim, it risks a cost allocation error that misstates what you've actually billed the government for that contract, which is a more serious problem in a DCAA audit than a simple payroll error.

Before submitting a bid on a contract that will fall under SCA, pull the current wage determination for the contract's location and labor categories, and confirm your proposed pay rates and benefits actually satisfy both the wage and fringe requirements, since pricing a bid without this check risks winning a contract you can't staff compliantly at the price you bid.

Also confirm your timekeeping system can support the specific contract type's documentation requirements from day one of performance, not retrofitted after an early audit finding.

Confirm these points before you submit a bid on an SCA contract:

• Pull the current wage determination for the contract's location and each labor category you plan to staff, rather than relying on a rate from a prior bid.
• Check that your proposed hourly rates satisfy the wage floor, and that your benefits, plus any cash equivalent, cover the fringe component.
• Map every employee on the contract to a labor category, since the payroll platform can pay only the rate you configure.
• Verify that your timekeeping setup supports daily entry by contract and task code, with corrections made through a visible audit trail.