CertiSub blog

Certificates, audits and the paperwork in between

Plain-English guides for general contractors and office managers who track subcontractor insurance, W-9s and agreements.

Oct 30, 2026 · 5 min read

A subcontractor's certificate of insurance expired: what to do next

What an expired certificate of insurance may mean for a general contractor, steps many GCs take when a sub's COI expires mid-project, and how to catch the next one sooner.

Oct 30, 2026 · 5 min read

Hiring a subcontractor without workers' comp: what could happen and what to ask

What may happen if a subcontractor has no workers' comp, how it could affect your audit, why the answer varies by state, and questions many GCs ask before the first payment.

Oct 30, 2026 · 4 min read

Subcontractor onboarding checklist: what GCs often collect before the first payment

A practical subcontractor onboarding checklist covering the certificate of insurance, W-9, workers' comp or exemption, license and agreement, plus how to keep it from becoming a chore.

Oct 30, 2026 · 4 min read

W-9s for subcontractors: when to ask, why it matters and how to store them

What a W-9 is, when many general contractors collect one from subcontractors, what can happen without one, how long the IRS suggests keeping it, and how to handle it safely.

Oct 24, 2026 · 5 min read

Subcontractor certificates of insurance: what GCs often require and check

A practical guide to subcontractor certificates of insurance for general contractors — what a COI is, what GCs commonly ask subs for, how to get one, what to check when it arrives, and ways to keep them current.

Oct 24, 2026 · 8 min read

Workers' comp audit: what happens and how to prepare

What may happen at a workers comp audit — why it happens, the types of audits, what auditors often ask a general contractor for, how subcontractors can affect the result, and ways to prepare.

Oct 24, 2026 · 3 min read

1099s for subcontractors: what changed for 2026 and how to get ready for January

A general overview of 1099s for subcontractors, the IRS's new $2,000 Form 1099-NEC threshold for 2026, the January 31 deadline, and how collecting W-9s early may help.

Oct 24, 2026 · 3 min read

Additional insured on a certificate of insurance: what GCs often ask for

A plain-English look at additional insured status on a subcontractor's certificate of insurance, why the certificate alone may not be the whole story, and what general contractors often request.

Oct 24, 2026 · 4 min read

COI tracking for contractors: a simple system (and when software might help)

A simple certificate of insurance tracking approach for general contractors, what to collect and watch, and when a COI tracking spreadsheet may stop being enough.

Oct 24, 2026 · 6 min read

Florida workers' comp exemption: a plain-English guide for construction

How the Florida workers comp exemption (Certificate of Election to be Exempt) works in construction — who the state says can apply, how long it lasts, what it covers and doesn't, and what general contractors may want to keep on file.

Oct 24, 2026 · 4 min read

How to read an ACORD 25 certificate of insurance, section by section

A section-by-section look at the standard ACORD 25 certificate of insurance, and a few things general contractors often check when one comes in.

Oct 24, 2026 · 5 min read

Workers' comp audits and subcontractors: why payments without a certificate could be added to your bill

How a workers comp audit may treat subcontractors, why a payment made outside a sub's certificate dates could end up on your bill, and habits that may help.