A bookkeeper’s responsibilities and duties center on keeping a business’s financial records accurate, current, and legally defensible. That work includes logging every transaction in the general ledger, managing what the business owes and is owed, running payroll with the correct tax withholdings, collecting and remitting sales tax, reconciling accounts against bank statements, tracking contractor payments, retaining records for the required periods, and producing the financial statements owners and accountants rely on. Done well, it keeps the IRS, the Department of Labor, and state tax agencies satisfied. Done poorly, it invites penalties that often cost more than the bookkeeper.
Recording Every Transaction in the Ledger
The foundation of the job is documenting each financial event in a general ledger using double-entry accounting, where every entry produces a matching debit and credit. Each transaction is coded to the correct account in the business’s chart of accounts, which groups entries into assets, liabilities, equity, revenue, and expenses. Miscoding quietly distorts reports and can produce inaccurate tax filings by year-end.
The IRS requires every taxpayer to keep records supporting the items on their returns.1Office of the Law Revision Counsel. 26 USC 6001 – Notice or Regulations Requiring Records, Statements, and Special Returns When records are inadequate and the business underpays as a result, the shortfall is treated as negligence and carries an accuracy-related penalty of 20 percent of the underpayment, on top of the tax owed.2Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
Managing Money In and Money Out
On the payables side, the bookkeeper verifies vendor invoices, matches them against purchase orders, and schedules payment before the due date. Late payments trigger contractual fees and, over time, can cost the business its credit terms.
On the receivables side, the bookkeeper issues invoices, records payments received, and flags overdue accounts before they age past the point of easy collection. An unpaid 60-day-old invoice that nobody surfaces is revenue the business quietly absorbs.
How these transactions hit the books depends on the accounting method. Under cash-basis accounting, revenue lands when payment arrives and expenses land when they’re paid. Accrual-basis accounting records revenue when it’s earned and expenses when they’re incurred, whether or not cash has moved. Accrual takes more bookkeeping work because receivables and payables have to be tracked as they arise, but most businesses above a certain size use it because it gives a truer picture of financial health at any moment.
Collecting and Remitting Sales Tax
In states with a sales tax, the bookkeeper calculates the correct tax on qualifying transactions, collects it from customers, and remits it on the schedule the state or locality sets. Rates vary by jurisdiction, and rules differ between goods and services.
Since the Supreme Court’s 2018 decision in South Dakota v. Wayfair, most states also require out-of-state sellers to collect and remit once they cross an economic nexus threshold. The most common trigger is $100,000 in gross sales into the state, with some states adding a transaction-count requirement or setting a higher dollar threshold. Monitoring those thresholds and flagging when the business crosses one in a new state is part of the role.
Sales tax is a trust fund tax: the money belongs to the government from the moment it’s collected. Business owners and financial decision-makers can be held personally liable for unremitted amounts, and that liability survives bankruptcy. Penalties, interest, and permit revocation follow, and knowingly keeping collected sales tax can be charged as fraud.
Reconciling Accounts
Reconciliation compares the company’s internal records to external documents such as bank statements and credit card reports, confirming that the ledger’s cash balance matches what the bank actually holds. Discrepancies are routine: bank fees not yet booked, deposits in transit, uncleared checks, occasional errors. Each has to be traced and resolved.
Reconciliation is also where fraud gets caught. Unauthorized activity spotted within days is far more recoverable than the same activity discovered months later. Federal law gives consumer account holders 60 days after receiving a statement to report unauthorized electronic transfers and limit liability.3eCFR. 12 CFR 1005.11 – Procedures for Resolving Errors Business accounts don’t get that statutory protection; banks set their own commercial dispute windows, and those are often shorter and less forgiving. Regular reconciliation matters more for businesses, not less.
The bookkeeper also reconciles petty cash. A designated custodian tracks small disbursements, and periodic counts confirm that remaining cash plus receipts equals the original fund balance. Weak petty cash controls are one of the most common entry points for internal theft.
Running Payroll
Payroll is where bookkeeping carries the most immediate legal exposure. Every pay period, gross wages are calculated from hours or salary, required amounts are withheld, and net pay goes out.
Employee Withholdings and Employer Taxes
Social Security tax is withheld at 6.2 percent of each employee’s wages up to a taxable maximum of $184,500 in 2026.4Social Security Administration. Contribution and Benefit Base Medicare tax is withheld at 1.45 percent on all wages with no cap, plus an additional 0.9 percent Medicare surtax on wages above $200,000 for individual filers.5Office of the Law Revision Counsel. 26 USC 3101 – Rate of Tax Federal income tax withholding follows each employee’s Form W-4, collected at hire and updated when circumstances change.6Internal Revenue Service. About Form W-4, Employee’s Withholding Certificate
The employer matches the 6.2 percent Social Security and 1.45 percent Medicare contributions. Employers also owe federal unemployment tax at a statutory 6.0 percent on the first $7,000 of each employee’s wages.7Internal Revenue Service. Topic No. 759, Form 940 – Employers Annual Federal Unemployment (FUTA) Tax Return Employers who pay state unemployment tax on time receive a 5.4 percent credit, reducing the effective FUTA rate to 0.6 percent in most cases.8U.S. Department of Labor. FUTA Credit Reductions, Employment and Training Administration The bookkeeper tracks these obligations and makes sure deposits go out on schedule.
Pre-Tax Deductions and Employment Records
Many employees also have pre-tax deductions for health insurance, retirement contributions, or flexible spending accounts. When these are offered through a cafeteria plan under Section 125, elected amounts are excluded from gross income before payroll taxes are calculated.9Office of the Law Revision Counsel. 26 USC 125 – Cafeteria Plans Getting these wrong throws off taxable wages, withholdings, and W-2 reporting all at once.
The bookkeeper also maintains employment compliance paperwork. Every employer must keep a Form I-9 verifying each employee’s identity and work authorization, retained for three years after the hire date or one year after employment ends, whichever is later.10U.S. Citizenship and Immigration Services. I-9, Employment Eligibility Verification Fair Labor Standards Act violations for overtime or minimum-wage infractions carry civil penalties of up to $2,515 per violation for repeated or willful offenses.11eCFR. 29 CFR Part 578 – Tip Retention, Minimum Wage, and Overtime Violations – Civil Money Penalties Careful hour tracking, flagged before payday, prevents most of them.
Paying Contractors and Filing 1099s
When a business pays independent contractors, the bookkeeper handles a separate track. Before any payment, collect a completed Form W-9 with the contractor’s taxpayer identification number. Without a W-9 on file, the business may have to withhold 24 percent of the payment as backup withholding.12Internal Revenue Service. Form W-9, Request for Taxpayer Identification Number and Certification
Any contractor paid $600 or more during the year must receive a Form 1099-NEC reporting the total.13Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC Cumulative payments have to be tracked all year so the forms are accurate and timely. Late filings trigger per-form penalties: $60 within 30 days of the due date, $130 by August 1, and $340 after that. Intentional disregard runs $680 per form with no cap.14Internal Revenue Service. Information Return Penalties
Retaining Records
Good records only matter if they survive to be produced. The IRS generally requires businesses to retain records supporting tax return items for at least three years from the filing date. That stretches to six years when unreported income exceeds 25 percent of gross income shown on the return, and to seven years for claims involving bad debts or worthless securities. If no return was filed at all, no expiration applies: the IRS can assess tax at any time.15Internal Revenue Service. How Long Should I Keep Records
Employment tax records have their own rule: at least four years after the tax becomes due or is paid, whichever is later.16Internal Revenue Service. Topic No. 305, Recordkeeping Payroll records must be kept for at least three years under Department of Labor regulations.17eCFR. 29 CFR Part 516 – Records to Be Kept by Employers Because the timelines overlap without matching, the safest practice is seven years for both payroll and general financial records, which covers every realistic audit window. The bookkeeper typically owns the retention schedule, maintains backups, and purges files only after the applicable period ends.
Preparing Financial Statements
Once transactions are recorded, categorized, and reconciled, the bookkeeper compiles the data into the reports owners and accountants use for planning and tax preparation. The profit and loss statement summarizes revenue and expenses over a period. The balance sheet captures assets, liabilities, and equity at a single moment. The statement of cash flows tracks how money actually moved, split into operating, investing, and financing activities. Together, the three give a complete view of financial position.
These reports follow Generally Accepted Accounting Principles, the standardized framework established by the Financial Accounting Standards Board, which is what lets a lender or investor trust that one company’s balance sheet was built on the same conventions as another’s.
Many bookkeepers also produce budget variance analyses that compare actual results against projections. If marketing was budgeted at $8,000 for a quarter and the business spent $11,000, the unfavorable variance prompts a real conversation about whether the extra spending produced returns or simply drifted.
Where the Bookkeeper’s Role Ends
Bookkeepers keep the detailed, day-to-day transactional records. Accountants take those records and do the higher-level work: interpreting trends, advising on tax strategy, preparing tax returns, and certifying financial statements for audits or external stakeholders.
No state license is required to work as a bookkeeper, though voluntary credentials like Certified Bookkeeper (CB) and Certified Public Bookkeeper (CPB) exist. Certified Public Accountants are state-licensed and carry authority a bookkeeper does not, including signing audit opinions and representing clients before the IRS. A bookkeeper who steps into interpreting the data or offering tax advice is working outside the role. The cleanest arrangement pairs a bookkeeper producing airtight records with an accountant turning those records into decisions.