Contractor 1099 Tax Compliance & E-Filing3 min readUpdated September 2026

1099 Filing Across Multi-State Solar EPC Job Sites

For commercial solar and energy EPC firms, the choice between Tax1099 and Track1099 starts with how many states your crews worked in, because state filing requirements don't stop at the federal form. Each site brings its own electricians, roofers and interconnection subs, so by December the payee list sits in job costing, split across the jobs those crews touched.

The decision here isn't really about the software interface. It's about whether your process pulls payee data from job costing into a single reportable list before year end, or whether that consolidation happens for the first time in January.

The platform matters less than the underlying process, but a firm scaling into more states each year should weigh state-filing support more heavily than a firm that has stayed put.

Vendors Covered in this Article

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Count your states before you count your payees

A crew that worked interconnection jobs in three states this year may trigger state-level 1099 filing obligations in addition to the federal one, depending on each state's rules. Before comparing tools, list every state where you ran a job this year, not just where your company is registered. If that list is longer than a couple of states, weight your evaluation toward whichever platform handles multi-state filing with less manual state-by-state configuration, since that's the part of the process most likely to eat a controller's time in January.

Pulling payee data out of job costing without losing anyone

If your project managers issue purchase orders per job rather than per vendor, the same electrical sub can show up under three different job numbers with three different partial totals, none of which crosses $600 on its own even though the combined total does. Before filing season, run a report that groups payments by payee name and TIN across every job, not by job number, and reconcile that against whatever vendor list your filing tool has on file. This single step catches more missed 1099s than any feature comparison between the two platforms.

Day-rate crews and per-diem specialists need a consistent code

Interconnection specialists and commissioning engineers often work day rates across several projects in a short window. Say one of them works five days on your job for a flat day rate: that payment gets coded the same way a longer-term subcontractor relationship would be, once their total for the year reaches the reporting threshold. The mistake to avoid is treating a short engagement as too small to track just because the job itself was brief. Say a specialist works a short job at a high day rate: that can cross $600 faster than a longer job paid at a lower rate. Keep a single running log per payee across the year, even when their work is spread across unrelated jobs in unrelated states, so nobody has to reconstruct that history from job files in January.

Retainage and the timing problem

Retainage held back until substantial completion, then released months later, means a subcontractor's final payment can land in a different tax year than most of their work. Confirm with your accountant how retainage timing affects which year a payment is reportable in, and make sure whichever filing tool you use lets you hold a payee record open across a fiscal year boundary rather than closing it out the moment the job wraps. This matters more in solar EPC than in most trades, because substantial completion on a commercial system can trail the bulk of the labor by several months, and a subcontractor who did most of their work in one year might not see final payment until the next.

What this costs in review time

National wage data puts the median pay for the accountants and auditors who typically handle this reconciliation at $83,680 a year1, and that's before adding the extra step of consolidating job-costed payments across multiple states. If your EPC firm runs jobs in more than a handful of states, budget review time accordingly rather than assuming the software subscription is the only cost that changes between the two tools.

Choosing a platform once your consolidation process works

Once payee data reliably consolidates across job numbers and states, the choice between Tax1099 and Track1099 mostly comes down to how each handles state-level filing and how well each connects to your job-costing or accounting system, so check each vendor's current state coverage and integrations. A smaller EPC firm running jobs in two or three states can usually manage either platform with a manual export from job costing once a quarter. A firm scaling past that footprint benefits from a platform whose state coverage and system integration reduce how much of that consolidation work happens by hand every filing season.

Compare the platforms on these points:

  • How each handles state-level filing for crews that worked in several states.
  • How well each connects to your job costing or accounting system so payees consolidate across job numbers.
  • Whether one payee with several partial totals across purchase orders rolls into a single reportable total.
  • How each treats retainage released in a later tax year than most of the work; confirm the details with your accountant.
  • Whether day-rate crews and per-diem specialists can be coded consistently across projects.
Executive Capability Standard

What Good Looks Like

A multi-state EPC contractor consolidates job-costed subcontractor payments into a single payee list by payee and TIN, not by job number, before year-end filing, and tracks which states each crew worked in.

Building The Capability (5-Stage Skill Ladder)

1. Learn:Pull a report of every state your crews worked a job in this year and compare it against your current filing tool's state coverage.
2. Do Manually:Reconcile job-costed payments by payee name and TIN across every job number at least once a quarter.
3. Delegate:Assign one person to own the consolidated payee list, separate from whoever manages individual job budgets.
4. Automate:Connect job costing data to Tax1099 or Track1099 so payee totals update automatically as jobs close rather than through a single year-end pull.
5. Buy:Move to a platform with built-in multi-state filing support once your job footprint regularly spans more than a few states.

How to Get Started

Disclosure: We may earn a commission if you buy through some links on this page. It doesn't change what we recommend.

Tax1099

Tax1099 handles multi-state 1099-NEC filing for contractors paid across several project states.

Visit Tax1099→
Mercury

Mercury can help track vendor payments by job and state through its treasury tools when you're consolidating a job-costed payee list.

Visit Mercury→

Frequently Asked Questions

Do we need a separate 1099 for each state a subcontractor worked in?

The federal 1099-NEC is one form per payee per year, but some states have their own filing requirements that run alongside it. Check each state where you did work this year, since requirements vary and a subcontractor working across state lines can trigger obligations beyond the federal filing.

How do we handle a sub who worked on our jobs through a staffing agency for part of the year and directly for us later?

Payments made to the staffing agency are the agency's to report, not yours. Once the person starts invoicing you directly, their payments to you as a direct contractor are what counts toward your own 1099 obligation, starting from the date that direct relationship began.

Does retainage held over the new year change which year it's reportable in?

Generally a payment is reportable in the year it's actually paid, not the year it was earned, but retainage timing can get complicated depending on your accounting method. Confirm the specifics with your CPA before you close out filings for the year.

Sources

Where we quote a benchmark, we show its source. Other figures in this guide are estimates or general guidance, so check them against your own numbers.

  1. Annual wage, Accountants and Auditors (SOC 13-2011), US all industries. BLS OEWS May 2025, 2025.

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