Filing 1099s for Seasonal Preparers at a Multi-State Tax Firm

Most multi-state tax firms bring on a wave of seasonal enrolled agents and contract preparers for filing season, alongside a smaller group of specialists retained year-round for complex multi-state or nexus work. The seasonal group generates a short, intense burst of payments over a few months; the year-round group generates smaller, steadier payments. Track both separately in your intake, since they have different TIN validation timelines and different risk profiles for turnover before you can correct a mistake. A simple tag in your vendor system, seasonal versus year-round, makes this split trivial to maintain once it exists.

A seasonal preparer who works six weeks and then moves on is exactly the profile most likely to have a filing gap if a TIN error isn't caught immediately, since there's no year-round relationship to catch it against later. What protects you is a check that validates as each seasonal preparer is onboarded, ideally in December before the rush starts, rather than waiting to check the whole roster once filing season is already underway and everyone's attention is elsewhere; confirm which vendor actually does this today. Waiting until the roster is already billing means chasing a correction from someone whose contact information may already be stale by March.

A specialist brought in for complex multi-state nexus work might bill against several different client engagements over the year. File one 1099-NEC for their total, not one per client engagement. Tax1099's direct sync from your accounting system handles this automatically if payments are already tracked by vendor; Track1099's CSV import requires the consolidation to happen in your export before you upload it. Check this before building your batch, not after a specialist calls asking why they received two forms.

The median wage for accountants and auditors nationally is $83,680, with the 75th percentile at $109,810¹, and for a firm staffing up seasonally, that's roughly the range you're paying contract preparers and reviewers during the rush. Payroll and contractor costs in professional, scientific and technical services firms run well above a third of revenue at small firms², which means getting the seasonal contractor filing process clean isn't a minor administrative task, it's a meaningful cost center worth optimizing. Treat that cost line with the same scrutiny you'd apply when reviewing a client's payroll efficiency.

It's common for a strong seasonal preparer to convert to a year-round staff role the following season. If that conversion happens mid-year, split their payment history: a 1099-NEC for the contractor period and a W-2 for the employee period, the same rule that applies at any company. Neither platform automates that split; pull the conversion date and separate the records before uploading. HR and finance should confirm the date together rather than each assuming the other has it recorded.

A firm whose seasonal roster is large and turns over heavily every year benefits from a platform built for ongoing validation, since new preparers are added in bursts right before the busiest weeks of the year, when there's no time to discover a mismatch after the fact. A firm with a smaller, more stable specialist bench and only a modest seasonal surge may find a simpler, lower-volume workflow more cost-effective; get current pricing from each vendor and check it against your actual roster size rather than assuming either one is cheaper by default.

The firms that handle this most smoothly run a short checklist in early December, before the seasonal roster starts billing: confirm every returning preparer's W-9 is still current, collect W-9s from new preparers before their first assignment, and validate TINs for the entire incoming roster in one batch while there's still time to chase a correction. That single habit turns January from a scramble into a review step. It takes one afternoon and turns what used to be a January scramble into a routine review, year after year.

Before the roster starts billing, work through this list:

1. Confirm every returning preparer's W-9 is still current before the season begins.
2. Collect a W-9 from each new preparer before their first assignment.
3. Validate TINs for the whole seasonal roster before anyone starts billing.
4. Consolidate specialists paid across several client engagements into one payee total.
5. Pull conversion dates for any preparer moving from contractor to staff, so contractor pay and W-2 wages stay separate.