September Doesn’t Feel Like a Deadline. It Should.
Most business owners treat September like a breather. Summer’s winding down and the year-end scramble still feels far enough away to ignore. It isn’t as far away as it feels. September is actually the last stretch where a problem hiding in your books is still small enough to fix quietly. Wait until January to find it, and you’re not fixing a small problem anymore. You’re doing forensic accounting under a deadline, probably during the two weeks of the year you’d rather spend anywhere else.
This year happens to hand business owners a few extra reasons to actually open the books this month instead of letting it slide.
The Calendar Is Already Making You Look
September 15 is the third quarter estimated tax deadline for individuals. It’s also the extended filing deadline for calendar year S corporations and partnerships. If your business pays estimated taxes, or filed an extension back in the spring, that date is already forcing you to look at where things stand. Might as well use that forced moment for more than writing a check. It’s a decent excuse to ask whether your books reflect where the business actually is right now, not where it was back in April.
The Contractor Rules Actually Moved This Year
Quick thing worth knowing before Q4 hiring kicks into gear. For payments made in 2026, the federal reporting threshold for most 1099-NEC payments jumped from $600 to $2,000, and similar treatment applies to certain 1099-MISC payments, with a few exceptions that keep this from being a blanket rule. That’s a real change, not a rumor floating around a small business Facebook group, and it means fewer contractors will need a 1099 issued at year end than in past years.
Fewer forms doesn’t mean less work, though. If anything it means the opposite. A payment sitting under the new threshold still has to be tracked accurately even if it never triggers a form. If your contractor records and W-9s have gone stale, September is a much friendlier month to chase that paperwork down than December, when everyone you’re emailing has disappeared into their own year-end chaos.
The 1099-K threshold shifted too. Payment apps and marketplaces don’t have to issue a 1099-K anymore unless someone crosses $20,000 and 200 transactions in a year. That’s a reporting threshold, not a tax rule, and it’s worth remembering the difference. The income is still taxable whether or not a form ever shows up for it.
Five Things Your Books Should Be Able to Tell You, Right Now, Today
Here’s a fair test. Can you answer these using your current books, not last quarter’s, not whatever you half-remember from a phone call back in June? Do you actually know who’s classified as a contractor and who’s an employee, and would that classification hold up if someone asked? Are your W-9s on file for everyone you’ve paid this year? Are your bank and credit card accounts reconciled through last month, or are a few months just sitting there untouched? Do owner distributions match what actually left the account? And if you pulled a year-to-date P&L right now, would it tell you something true, or would it need a cleanup pass before it meant anything at all?
If more than one of those made you wince a little, that’s completely normal. It’s also a lot easier to fix in September than it is in the middle of January, when you’re also trying to remember your own name.
Why Doing It Now Beats Waiting
Clean books in September mean walking into Q4 with real numbers instead of a guess. They mean your year-end 1099 prep starts from solid contractor records instead of a last-minute scramble to track down W-9s from people who’ve stopped answering emails entirely. They mean whoever handles your taxes gets financials they can actually use, instead of a mess that eats the first two weeks of their January.
This is exactly the kind of work our team builds into ongoing bookkeeping, rather than saving it for a once-a-year fire drill, because nobody should find out in January that something’s been off since July. If you want a second set of eyes on where your books actually stand before Q4 hits, now’s the easiest time to have that conversation. There’s still time to do something about it.