Local Bozeman Questions
Is It Too Late to Catch Up on Your Books Before Tax Season?
By Chris Kimbell · · 4 min read

It's fall in Montana. The crews are slowing down, the phone is a little quieter, and you finally have a minute to look at the books. Then you realize you haven't really touched them since spring.
That feeling in your stomach is common. Here's the honest answer to the question most owners ask next.
Is it too late to catch up on your bookkeeping before tax season?
No, it's usually not too late. If you start in late fall or early winter, there's normally enough time to rebuild the year, fix what's wrong, and hand your tax preparer clean numbers. The real risk isn't starting now. It's waiting until the new year, when everyone else is in a hurry too.
Catch-up bookkeeping just means going back and doing the work that got skipped. Every deposit and every charge gets sorted, matched, and checked against the bank. It's not magic. It's just work done in order.
Why late fall is the right time in Montana
National articles talk about catch-up bookkeeping like every business has the same year. Montana service businesses don't.
If you work in the trades here, your year is lopsided. Most of your jobs, your materials, and your sub payments get crammed into a short build season. That's exactly when the books get pushed aside, because nobody stops a pour or a roof to reconcile a bank account.
So the slow months are your window. You have time to answer questions about old charges while you still remember them. In January, you'll be juggling year-end paperwork and trying to get on your tax preparer's calendar along with everyone else in the Gallatin Valley.
What catch-up bookkeeping actually involves
Whether you do it yourself or get help, the steps look about the same.
- Gather every bank, credit card, and loan statement for the year.
- Pull your invoices from whatever you use to bill customers.
- Match each deposit to the job or customer it came from.
- Sort each expense into the right category, like materials, fuel, or subs.
- Reconcile each month, so the books match the bank to the penny.
- Fix the snags, like duplicate entries, missing receipts, or personal charges on the business card.
- Review the finished year before it goes to your tax preparer.
The order matters. If you skip straight to categories without matching the bank first, you can end up with books that look tidy but are still wrong.
What makes catch-up faster or slower
How long it takes depends less on your revenue and more on how messy the trail is. Here's how common situations tend to play out.
| What you have | How it affects catch-up |
| A separate business bank account and card | Faster. Every charge is already business, so it just needs a category. |
| One account for business and personal | Slower. Every line needs a call: business or personal. |
| Invoices in job or billing software | Faster. Deposits can be matched to real jobs. |
| Customers who pay in cash or by check, deposited in batches | Slower. One deposit may cover several jobs, and someone has to untangle it. |
| Sub paperwork collected when each sub started | Faster. Year-end forms are mostly a matter of adding things up. |
| Subs paid all year with no paperwork on file | Slower. You'll be chasing forms and details from people who may have moved on. |
Most businesses have a mix. That's normal. It just helps to know where the slow spots are before you start.
Montana details the national guides skip
A few things work differently here, and they change what catch-up looks like.
No sales tax means one less thing to rebuild
Montana has no general state sales tax. So most local service businesses don't have sales tax returns to reconstruct, which can be a big chunk of catch-up work in other states. You still want clean records, though. We cover the details in how Montana's lack of a sales tax affects your bookkeeping.
Subs and the ICEC
Montana has its own rules for independent contractors, including the Independent Contractor Exemption Certificate. If you used subs this year, catch-up is a good time to make sure you know who had one and who didn't. Our post on 1099 contractors versus W-2 employees in Montana walks through what to collect.
Keep what you find
Catch-up often turns up a stack of statements, receipts, and old invoices. Don't toss them once the books are done. Here's what records a Montana contractor should keep, and for how long.
Should you do it yourself or get help?
If you're only a month or two behind and you like this kind of work, you can probably catch up on your own. Block out a few evenings, start with the bank statements, and work one month at a time.
If you're most of a year behind, or you're not sure the bank balance in your software is even right, it's worth getting help. The goal isn't just to finish. It's to finish with numbers your tax preparer can trust, so you're not paying someone to redo the work in March.
Either way, the worst choice is the one most people make: waiting until the tax appointment and hoping it sorts itself out.
What to do this week
You don't need to fix everything today. Just get the pieces in one place.
- Download every bank and card statement for the year.
- Export your invoice list from your billing software.
- Make a list of every sub you paid, even small jobs.
- Pull any loan or equipment financing statements.
- Note anything weird you already know about, like a personal purchase on the business card.
That list alone will save hours, whether you do the work or someone else does.
Getting caught up with Blackfin
Catch-up and clean-up bookkeeping is a big part of what we do for service businesses around Bozeman. We keep bookkeeping and tax prep under one roof, so the people cleaning up your year already know what your return will need.
If you're behind and want a plan, take a look at our bookkeeping services for Bozeman businesses, or call 406-404-8955. You'll hear back within one business day.
This article is general information, not tax, legal, or investment advice. Every business is different, so call us at 406-404-8955 to talk about yours.

Chris Kimbell, Founder of Blackfin Accounting
About Chris and Blackfin

