A receipt in a coat pocket is not a record. A lunch on a personal card is not a clean business expense.
Common bookkeeping mistakes start that small. IRS Publication 583 says you may forget an expense unless you record it when it happens. Bench says a year of guesses comes due at tax time. The fixes are habits. They are not a rescue project in March.
Key Takeaways
- Keep the money in two lanes. IRS Publication 583 says to open a business checking account and keep it apart from your personal account. Deposit the day's receipts there. Note whether a deposit is business income or personal funds or a loan.
- Categorize while you remember. The IRS says it is generally best to record transactions daily. Bench says a monthly pass is the minimum and a weekly pass is the better rhythm.
- Reconcile on purpose. IRS Publication 583 says to reconcile the checking account so you can find errors. SCORE says a consistent reconciliation shows the cash you have and catches a bank error before it grows.
- Keep the proof, and know which clock applies. SCORE and Bench say to keep receipts at least seven years. IRS Publication 583 uses different periods for different items. The common period is three years.
- Do not book an owner's payment as an expense. Bench says that entry cuts profit and shows the wrong income for tax. Record it as an owner's draw.
Table of Contents
Mixing personal and business money
Mix personal and business expenses and the books stop telling one story. IRS Publication 583 says one of the first steps is a business checking account, kept separate from your personal account. The checkbook is the main source for the books of most small businesses. Deposit all daily receipts into it. On the deposit slip, note the source. Business income. Personal funds you put in. A loan.
The IRS illustration in that publication is a shop owner who does not pay personal bills from the business account. If you do, the publication says to record the payment anyway. You cannot deduct it as a business expense.
Bench describes the lunch you pay with a personal debit card because the business card is at home. Commingling turns the books and the tax return into a maze. Bench says it can remove a layer of legal protection if the business is audited or sued. That is Bench’s warning. It is not a court deciding your case. The practical habit Bench names is simple. Use a business account and a business card. Mark the business cards so you grab the right one. Keep a little cash in the business account for small costs so you are not pushed onto the personal card.
If a personal charge hits the business card, Bench says you can repay the business or record an owner’s draw. The cleaner path is to avoid the mix.
Forbes Advisor makes the same split a day-one rule. Business accounts stay apart from personal accounts. A price and a tax return built on mixed spending are hard to trust. Forbes Advisor says bookkeeping records the transactions and accounting turns those records into reports. Mixed accounts poison both jobs.
Waiting to categorize
Late expense categorization is how a real cost becomes a guess. IRS Publication 583 says to record expenses when they occur. It says you may forget them by the time you prepare the return. The publication says a daily record is generally the best practice.
SCORE says to track expenses as you incur them. The longer the gap, the more costs get skipped. SCORE’s accounting guide says not to rely on memory.
Bench lists what the delay costs.
- You cannot remember what a receipt was for or how you paid.
- Reconciliation becomes a pile of unmatched items.
- A deductible cost never gets written down.
- Errors sit until they are large.
- Decisions use old numbers.
Bench’s rhythm is monthly at a minimum and weekly when you can. A daily reconciliation is for a volume so high that Bench says you should hire a bookkeeper.
Guessing the category is the partner of the delay. Bench says a best-guess book produces a year of repairs. Wrong categories. Missed deductions. Filing dates you miss because the books were not ready.
SCORE calls the category problem mis-categorization and over-categorization. Owners create duplicate accounts or drop a cost in the wrong one. SCORE says to keep the chart of accounts lean. Use standard categories. Add a new one only when you need it. A bookkeeper can clean a chart that has two names for the same cost.
Bench says to set that chart at the start and to enter the opening balances. Learn the classifications before you post a year of transactions. A short checklist each week or each month keeps the categories current. Forbes Advisor calls the chart of accounts the financial encyclopedia. If marketing and materials and the owner’s personal spending share one line, the report cannot tell you what changed.
Skipping the bank reconciliation
Bank reconciliation mistakes hide in the items you never match. IRS Publication 583 says to reconcile the business checking account and look for errors. The checkbook entries and the bank have to tell the same story.
SCORE says reconciliation is how you know the cash on hand and how you find a bank error before it becomes a large problem. SCORE says the work can be complicated. An experienced bookkeeper is a fair hire for that pass.
Bench ties the pain to delay. If you save the match for a shoebox month, the reconciliation is the hard part. Do the books at least monthly so the unmatched items are few.
Forbes Advisor lists reconciliation with the core bookkeeping tasks, next to recording transactions and handling bills and invoices. A fee or a deposit that never hits the books changes both the cash figure and the expenses.
What you are matching is specific. Deposits in transit. Checks that have not cleared. Interest. Bank fees. A payment the bank shows and the books do not. SCORE says that catch is the point. You want the error while it is small.
Receipts, and how long to keep them
A canceled check proves you paid. IRS Publication 583 says proof of payment alone does not prove the cost was a business expense. Keep the invoice or the receipt or the card slip that shows what you bought. Supporting documents include sales slips and paid bills and invoices and receipts and deposit slips and canceled checks. Organize them by year and by type.
SCORE says receipts under seventy-five dollars may not be required by the IRS, and it says to keep them anyway. They back up deductions. A photo in an accounting app can tie the slip to the register entry. SCORE says a paperless file can fail in an audit if the only copy dies with a hard drive. Keep a backup. SCORE’s period for that backup is at least seven years.
Bench agrees that a digital copy is acceptable and says to keep receipts for seven years to be safe. Write the details on meals and entertainment when you record them, so you can explain the cost if the IRS asks. Bench says a missing receipt can leave a deduction without proof and can bring a penalty. The page does not name the penalty amount.
IRS Publication 583 is more specific than a single seven-year rule. Keep records for the period that matches the item.
| Situation | How long IRS Publication 583 describes |
|---|---|
| A typical return | Three years after the return is due or filed. Use the date that falls second. |
| You omit income of more than 25 percent of gross income | Six years. |
| A claim for a bad debt or a worthless security | Seven years. |
| No return, or a fraudulent return | No time limit. |
| Property you dispose of | Through the limitation period for the year of the disposition. |
Employment tax records have their own clock. IRS Publication 583 points to at least four years after the tax is due or paid. Use the date that falls second.
Read the seven-year habit from SCORE and Bench as a choice on top of the IRS table. It does not replace the table. A fraudulent return or a missing return has no cutoff in the publication.
Electronic records have to meet the same bar as paper. IRS Publication 583 says the system must index and store and preserve and retrieve records you can read. You may drop the paper only after you have tested that the electronic file works. Forbes Advisor says a digital receipt is useful when it shows the vendor and the amount and the date and what you bought. That detail is what the IRS will ask you to explain.
Petty cash is where slips disappear. IRS Publication 583 says each payment from the fund gets a slip attached to the receipt. SCORE says to name a custodian and write a policy. Keep the receipts plus the leftover cash equal to the fund. When the fund runs down, SCORE says a check can restore it. If that check is payable to cash, IRS Publication 583 says to keep the receipt or a note written at the time. A check to cash with no slip is a hole in the file.
Owner pay and transfers
DIY bookkeeping errors show up on the equity lines.
Bench says sole proprietors and single-member LLCs should not record payments to themselves as expenses. The entry lowers profit. It shows the wrong total for the income you pay tax on. Record the payment to an equity account Bench calls an owner’s draw.
A transfer can fake a sale. Bench says money moving from a PayPal account or a TransferWise account into the business checking account raises the checking balance. Software may treat that increase as new income. Open the transaction and mark it as a transfer. Income is a customer payment. A transfer is the same money changing pockets.
SCORE adds a communication miss that creates the same kind of hole. You pay a bonus and never tell the bookkeeper. You buy supplies and never hand over the receipt. The books cannot include what nobody reported.
Sales tax and worker labels
Two mistakes create bills you did not plan to pay.
Bench says the tax agency cares that you pay the sales tax you owe, whether or not you collected it from the customer. Ask a CPA to explain what you must collect and when you must file, before you open if you can. SCORE says a common error is leaving sales tax inside total sales, which turns into a lump-sum bill. Online sales across states make the rules harder. SCORE says you and the bookkeeper need the current rules. These pages do not set your state’s rate or your nexus threshold. Get that from the state and from the CPA.
Worker labels are a books problem and a penalty problem. Bench says treating an employee as a contractor to skip taxes can bring steep IRS fines. SCORE says misclassification can bring tax penalties and lawsuits. Neither page prints the full test for employee versus contractor. If you are unsure, stop and ask a CPA or read the IRS classification guidance before you pick the account.
Who should do the work
Avoid bookkeeping problems by matching the task to the person.
SCORE says many owners dislike the books and do them anyway. A competent bookkeeper works through the file and finds errors an owner skips. SCORE says that second set of eyes saves time and money.
Bench says not to hand the bookkeeping to your CPA. Accounting fees run higher than a bookkeeper’s rate. Use the CPA for niche deductions and year-end moves and sales tax and an audit and the larger financial choices. Use the bookkeeper for the weekly record. Bench’s warning on a cheap hire is an eight-dollar-an-hour example from a classified ad. Treat that figure as Bench’s illustration of an inexperienced hire, not a wage to pay or to avoid by a set amount. Hire someone who has done the books in your kind of business.
Forbes Advisor’s caution belongs here. A careful owner can keep a clean spreadsheet. A careless owner can make a mess inside expensive software. The tool does not supply the habit.
A short habit list
Bookkeeping pitfalls shrink when the same pass happens every week.
- Deposit the day’s receipts into the business account. Note the source on the slip. IRS Publication 583 is the reason.
- Categorize the new costs before the week ends. If you cannot name the cost, the receipt is unfinished.
- Reconcile the account. Match the bank to the books. Enter fees and interest. Clear the items that do not belong.
- Photograph receipts and keep a backup. Follow the IRS period for the item. The seven-year file SCORE and Bench describe is extra protection.
- Scan owner payments and account-to-account transfers. Draw is not an expense. A transfer is not a sale.
- Once a month, read the profit statement. Bench says unread statements mean decisions on old numbers.
When the account and the categories live in one system, the weekly pass is a reconciliation and a stack of labeled costs. QuickBooks Online is one place to do that work. It will not decide that a lunch was personal or that a PayPal transfer was a sale. You confirm those before you close the month.
Set the week and keep it. If the file is in QuickBooks Online, reconcile before you trust the profit. Common accounting mistakes stay small when the receipt and the category and the bank line agree. That agreement is the record an exam can follow and the record you can use to run the month.
