Year-End Bookkeeping Checklist: How to Get Your Michigan Business Records in Order Before Tax Season

Somewhere around September, the math starts to feel ominous. The year is three-quarters over, tax season is not as far away as it used to seem, and the folder labeled 'receipts 2024' is either half-empty or distressingly full of things you cannot identify. You are not alone. Michigan has approximately 904,000 small businesses, the majority of which handle their own bookkeeping without dedicated accounting staff, according to the U.S. Small Business Administration. That means a lot of capable, busy people are heading into Q4 with books that need attention.

This checklist is not for the owner who has been perfectly organized since January. It is for everyone else.

Why September Is the Right Time to Panic (Calmly)

September is useful precisely because there is still time to fix things. By February, your options narrow considerably. You either hand a CPA a box of chaos or you file an extension and hand them a box of chaos three months later. Neither outcome is ideal, and both cost more in professional fees than getting organized now would.

The consequences of disorganized records are not just administrative. Missing documentation means missed deductions. Under Section 162 of the Internal Revenue Code, the IRS allows deductions for ordinary and necessary business expenses, but substantiation is required. No records, no deduction. During an audit, that is not a technicality; it is money out of your pocket.

If you read the six numbers you should have been tracking since July and realized you had not been tracking any of them, this checklist is your next step. Work through it in order. Each step builds on the one before it.

Step 1: Gather Your Bank and Credit Card Statements

Before anything else, you need a complete picture of what came in and what went out. Log into your business checking account and download 12 months of statements as PDFs, January through December, or through the most recent complete month. Do the same for every credit card used for business expenses, including any personal cards where business charges occasionally land.

If you still receive paper statements, scan them or photograph them and save the files somewhere you can actually find them, preferably a folder organized by month. Paper statements left in a desk drawer are not records; they are optimistic intentions.

These statements are the foundation everything else depends on. Reconciliation requires them. Locating missing receipts requires them. Confirming that a questionable charge was actually business-related requires them. You cannot audit your own records without a source of truth, and your bank statements are it.

While you are in your records, take note of every payment you made to individuals or vendors. You will want to confirm whether the people you paid were contractors or employees, because that classification affects both your year-end reporting obligations and your exposure to payroll tax issues.

Step 2: Reconcile Your Books (Here Is What That Actually Means)

Bank reconciliation is the process of matching every transaction in your accounting records, whether that is QuickBooks, Wave, FreshBooks, or a spreadsheet, to a corresponding line on your bank or credit card statement. If your records show a $340 payment to a supplier on October 12 and your bank statement shows the same payment on the same date, those two things reconcile. If they do not match, something needs to be investigated.

Unreconciled books are one of the leading reasons a CPA cannot prepare a tax return efficiently. When your records and your statements do not agree, your accountant has to figure out why before they can trust any number on the page. That detective work takes time, and time is billable.

For QuickBooks users, the reconciliation tool is under the Accounting menu. Wave and FreshBooks have similar built-in reconciliation features. Spreadsheet users need to do this manually, which is tedious but not complicated: print your statement, go line by line, and mark off every transaction that appears in both places. Anything left unmarked is a discrepancy that needs a home.

Do not force discrepancies to balance by entering a mystery adjustment. That is not reconciling; it is hiding a problem. Discrepancies can indicate missing deductions, duplicate entries, or misclassified income. Investigate them.

Once your books are reconciled, you will have accurate numbers to work with. That is also when the five numbers your financials should show you every month start to mean something useful, rather than reflecting a best guess.

If your books are more than two months behind on reconciliation, this is a reasonable point to consider whether professional help would cost less than the time and error risk of catching up yourself. More on that in the final section.

Step 3: Locate Your Mileage Log and Receipts

Mileage logs are among the most frequently missing records at tax time, and the IRS is not sympathetic about reconstructed ones. The requirement is contemporaneous records, meaning you log the date, destination, business purpose, and miles at the time of the trip, not in December when you are trying to remember where you drove in March. Logs assembled after the fact are more likely to be disallowed during an audit.

The 2024 standard mileage rate was 67 cents per mile, up from 65.5 cents per mile in 2023, per IRS Notice 2024-08. If you drove 10,000 business miles this year and did not log them, you left $6,700 in deductions on the table. That is not a rounding error.

If your log is incomplete, partial reconstruction using calendars, invoices, and credit card records is better than nothing and worth attempting. Going forward, a mileage tracking app like MileIQ or Everlance eliminates this problem entirely. They run in the background and log trips automatically.

For receipts, the IRS requires documentation that shows the amount, date, vendor, and business purpose of each expense. A credit card statement alone is generally not sufficient; it shows the amount and date but not what was purchased or why. The good news is that a photo of a receipt taken at the time of purchase satisfies the requirement, and most email receipts do too. Gather what you have: paper receipts, phone photos, email confirmations, and PDF downloads from vendors. Consolidate them into one place.

For a detailed look at the records that make mileage and home office deductions defensible, that article walks through exactly what documentation survives IRS scrutiny and what does not.

Step 4: Know What to Keep and for How Long

Retention requirements are not arbitrary. They correspond directly to the windows during which the IRS or Michigan Department of Treasury can audit you, assess additional tax, or require you to substantiate a deduction. Keeping records too long is harmless. Discarding them too soon is a liability.

Here is a practical retention schedule for the most common record types:

General tax records (federal): Keep for a minimum of 3 years from the date you filed the return, or 2 years from the date you paid the tax, whichever is later. This is the standard statute of limitations for IRS audits under most circumstances, per IRS Publication 583. If you substantially underreported income, that window extends to 6 years. If you filed a fraudulent return, there is no limit.

Employment tax records (federal): Keep for at least 4 years after the date the tax was due or paid, whichever is later, per IRS Publication 15 (Circular E). The Michigan Department of Treasury recommends 5 years for payroll records to align with the state's audit exposure window. When federal and state requirements differ, keep records for the longer of the two periods.

Michigan sales tax records: Under MCL 205.27a, Michigan's Use Tax and Sales Tax audit window is 4 years. Retain sales records, exemption certificates, and related documentation for at least 4 years from the date of the transaction or the filing of the return.

Property records: Keep records related to business property, including purchase price, improvements, depreciation, and sale documents, until the period of limitations expires for the year in which you dispose of the property. For depreciable property, that means holding records for several years beyond the sale. These records establish your basis in the asset and determine the taxable gain on sale.

The IRS audited approximately 0.44% of all individual returns in fiscal year 2023, but the audit rate for Schedule C filers with gross receipts above $100,000 was notably higher, per the IRS Data Book. If your business generates meaningful revenue, organized records are a financial protection strategy, not a filing cabinet problem.

A practical approach: create a digital folder for each tax year. Move everything relevant into it at year-end. Set a calendar reminder to purge old years once their retention windows close.

Step 5: Check Your Accounts Receivable and Payable Balances

Accounts receivable is money your customers owe you. Accounts payable is money you owe your vendors. Both balances matter at year-end because they affect which tax year your income and expenses fall into, and getting that wrong creates reporting errors that can generate penalties and interest.

Here is why: if your business uses cash basis accounting, which most sole proprietors and small LLCs do, income is recorded when you receive payment and expenses are recorded when you pay them. On cash basis, an invoice you sent in December but did not collect until January is January income. An expense you incurred in December but did not pay until January is a January deduction. The timing of the cash movement is what matters.

If you use accrual basis accounting, income is recorded when it is earned and expenses when they are incurred, regardless of when cash changes hands. That December invoice is December income on accrual basis, even if the customer pays you in February.

Most small businesses are on cash basis, but if you are not certain which method you use, this is worth confirming with your CPA before year-end rather than after. The method you use determines what needs to be recorded before December 31 and what can wait.

Go into your accounting software and pull the accounts receivable and accounts payable reports. Look for anything that appears incorrect: invoices marked paid that you do not remember collecting, vendor bills showing as open that you have already settled, or balances from prior years that never got resolved. These are the kinds of errors that cause income to land in the wrong year.

While you are reviewing cash flow timing, confirm your estimated tax payments for the year are current. Underpayments at year-end become penalties, and that is a straightforward problem to avoid.

When to Stop Doing It Yourself and Hand It Off

There is nothing wrong with doing your own bookkeeping. There is also nothing wrong with recognizing when it has become a liability.

Some clear signals that it is time to bring in a professional: your books are more than two months behind on reconciliation; you cannot locate records that you know should exist; you are not certain whether you are on cash or accrual basis; you filed a late or amended return last year; or you are spending hours on bookkeeping that you would rather spend running your business.

Bringing in a CPA or bookkeeper is not an admission of failure. It is the same decision you made when you hired someone to handle your payroll, your IT, or your legal questions. Your time has a value. At some point, the cost of professional help is less than the cost of the errors you are making and the deductions you are missing.

What the handoff actually looks like: you gather the records described in this checklist, share access to your accounting software or provide your spreadsheets and statements, and a professional takes it from there. The cleaner your records are when you hand them over, the less time the cleanup takes and the lower your bill will be.

Before the year ends, there are also tax moves that have hard October deadlines, not December ones. Some planning decisions, particularly around retirement contributions and entity structure, need to happen earlier than most owners expect. Getting your books in order now gives you the information you need to make those decisions before the window closes.

Birchwood Tax & Accounting works with Michigan small businesses through exactly this kind of year-end cleanup. If your records are behind and you want a professional to assess where things stand, contact us directly to get started.

Your next step this week: Download your January through September bank and credit card statements, save them in a folder labeled with the year, and check whether your most recent month has been reconciled in your accounting software. That single hour of work makes every subsequent step faster and tells you exactly how big the project ahead of you actually is.