An independent contractor onboarding checklist looks like an administrative artefact and is actually the output of a decision made before it: whether this person is an independent contractor at all. The IRS publishes how that question is approached, and the answer changes the list. This page sets out the core items for the contractor case, in the order that avoids rework, and is explicit about which parts are not ours to advise on.
The decision that governs the list
Independent contractor or employee is not a labelling choice, and the IRS sets out its own guidance on how the question is approached. Your firm and its counsel reach the answer; everything on this checklist assumes it has already been reached, because a list built on the wrong assumption has to be redone and, worse, produces a paper record built on the wrong footing.
Collect before first payment, not before year end
Taxpayer identification details, which for a US contractor means Form W-9, and payment details. Deferring the W-9 is the most common deferral there is and it is the one that produces the year-end scramble, because nonemployee compensation reporting on Form 1099-NEC needs exactly what the W-9 collects.
The commercial half
The signed agreement, the agreed rate and its basis, invoicing instructions, and any insurance or licence evidence your firm requires. None of this is unusual, and all of it goes missing when contractor onboarding is treated as a conversation rather than a process with a record.
Access, and why it is the slowest item
Systems, repositories, tools and whatever else the work needs. Access requests route through people outside the onboarding conversation who do not know the start date, which is why a contractor frequently has their paperwork complete and cannot begin. Starting the access requests on day zero, in parallel, is the fix.
Questions people ask about independent contractor onboarding checklist
What is the first item on the list?
Confirming the classification decision has been made and recorded. Everything else assumes it.
Does the checklist prove compliance?
No. It records what your firm collected and when, which is evidence of process. What your obligations are is a question for your counsel.
What if the contractor is outside the US?
The identity and tax documentation differ; the W-8 series applies rather than the W-9. The rest of the list is broadly the same.