Sole proprietors must maintain organized records of all income, expenses, and supporting documents (receipts, invoices, bank statements) for at least 3–6 years to support tax filings. Key records include gross receipts, deductible business expenses, assets purchased, and separate business bank account statements.
Retain your business records
You must keep sales and use tax records for four years unless CDTFA gives written authorization for their earlier destruction. This applies to all records that pertain to transactions involving sales or use tax liability.
Importance of Bookkeeping for Sole Proprietors
Here's why: Compliance with tax regulations: A sole proprietor's business income is reported on your personal tax return. Failing to track revenue and expenses accurately can lead to penalties and audits.
How far back can the IRS go to audit my return? Generally, the IRS can include returns filed within the last three years in an audit. If we identify a substantial error, we may add additional years. We usually don't go back more than the last six years.
Common categories include advertising, office supplies, rent, utilities, travel, meals, insurance, professional fees (like accounting or legal advice), and vehicle expenses.
Top 5 Bookkeeping Mistakes U.S. Business Owners Make (According to Bookkeepers)
don't have any special circumstances that require you to file (like self-employment income) earn less than $15,750 (which is the 2025 Standard Deduction for a taxpayer filing as Single)
The "20k rule" refers to the traditional IRS threshold for reporting income from payment apps and online marketplaces on Form 1099-K: over $20,000 in gross payments AND more than 200 transactions in a calendar year. While a law (the American Rescue Plan) temporarily lowered the threshold to $600, recent legislation, the One Big Beautiful Bill Act (OBBBA) (OBBBA), has reinstated the $20,000/200-transaction rule for tax years starting in 2025, providing relief for casual sellers and gig workers.
If you have ever wondered about the chances of your business being audited, you are not alone. If you are the sole proprietor, including an owner of a Single-Member LLC (SMLLC), of a business activity, the chance of being selected for audit by the IRS is 4.5 to 12 times higher than it is individuals without a business.
The 7 year rule
No tax is due on any gifts you give if you live for 7 years after giving them - unless the gift is part of a trust. This is known as the 7 year rule.
The four essential types of records include financial records (such as income statements, balance sheets, and cash flow statements), tax records (including tax returns and supporting documents), employee records (like payroll information and employment contracts), and business operations records (such as contracts, ...
The "3 Golden Rules of Accounting" (BK) are fundamental to double-entry bookkeeping: (1) Personal Accounts: Debit the receiver, credit the giver; (2) Real Accounts: Debit what comes in, credit what goes out; and (3) Nominal Accounts: Debit all expenses/losses, credit all incomes/gains, providing a clear framework for recording financial transactions accurately.
The biggest tax mistakes people make include filing late, math errors, incorrect personal info (like Social Security numbers), forgetting deductions/credits (like EITC), misreporting income, not signing forms, and making errors with bank details for direct deposit, all leading to delays, penalties, or missed savings, with using tax software or professionals helping avoid these common pitfalls.
Car payments themselves are not fully tax deductible, but if you use your vehicle for business purposes, you can deduct a portion of your car expenses. The IRS allows you to write off business-related vehicle expenses, which can include a percentage of your car loan interest or lease payments.
The IRS $600 rule refers to a change in reporting requirements for third-party payment apps (like Venmo, PayPal) for taxable income from goods and services, where platforms must send a Form 1099-K if you receive over $600 in a year, intended to capture gig economy/side hustle income, though delays and phased implementation have adjusted the timeline, with current rules for 2024 using a higher threshold ($5,000) before fully phasing to $600 for future years, but remember all taxable income, regardless of form, must always be reported.
IRS Audit Red Flags 2023: 25 Tax Return Audit Risk Factors