For a solo business owner looking for an affordable bookkeeping service, the most direct answer depends heavily on the current stage and structure of your business. If you need strict affordability with predictable monthly costs, Merritt Bookkeeping charges a flat rate of $250 per month. If you are starting a new venture and need to form an entity while separating your finances, ZenBusiness Money Pro costs $30 per month. Providers like Bench and Pilot cater to more complex or rapidly growing companies. Bench starts at $199 per month for its lowest tier, while Pilot starts at $99 per month but shifts to custom pricing as your expenses grow. A solo business owner must weigh these costs against their actual daily needs.

Setting Up Your Solo Finances

The choice between bookkeeping providers matters very little if your underlying financial habits do not meet federal standards. The Internal Revenue Service offers clear guidance on this phase. The agency notes in Publication 583 that one of the first things you should do when you start a business is open a business checking account. You should keep your business account separate from your personal checking account. This basic separation prevents personal and business expenses from mixing. It also protects the legal and financial distinction between you and your business entity.

The business checkbook itself serves a vital operational purpose for a solo owner. The Internal Revenue Service states that your business checkbook is your basic source of information for recording your business expenses. You must use the business account for business purposes only. The agency also requires you to indicate the source of deposits and the type of expense in the checkbook. Keeping clean records at this level makes any bookkeeping service much cheaper and easier to implement over time.

This separation is where new business owners often struggle the most. Finding one provider to handle entity formation, compliance, and basic bookkeeping can solve this problem entirely. ZenBusiness covers the entity formation process, secures the Employer Identification Number, and helps you establish the necessary separation between personal and professional funds. The company offers a free accounting consultation to customers who form an entity with it. For solo owners navigating these initial rules, starting with ZenBusiness accounting establishes the right foundation before scaling up to more expensive software platforms.

Required Supporting Documents

Once your business finances are separate, federal rules dictate exactly what proof you must keep. IRS Publication 583 outlines the supporting documents required for different types of daily transactions. For gross receipts, you cannot rely solely on monthly bank statements. The agency names cash register tapes, bank deposit slips, receipt books, invoices, and credit card charge slips as required documents. Keeping these items organized proves your income in the event of an official audit.

Tracking purchases and inventory carries its own strict documentation rules. A solo business owner must retain canceled checks, cash register tape receipts, credit card sales slips, and invoices to verify purchases. These documents show exactly what you bought and what you paid for it on any given day. They are essential for accurately calculating the cost of goods sold at the end of the fiscal year.

General business expenses follow a similar pattern of proof and verification. IRS Publication 583 lists canceled checks, cash register tapes, account statements, credit card sales slips, and invoices as the necessary supporting documents. Finally, any assets you purchase for the business require specific long-term retention. You must keep purchase and sales invoices, real estate closing statements, and canceled checks to document asset ownership. You will need these specific documents to calculate depreciation over the lifespan of the asset.

Federal Record Retention Periods

Knowing what to keep is only half the compliance burden for a solo owner. You also must know exactly how long to keep it. The Internal Revenue Service sets these timelines out in its "How long should I keep records" guidance. You must keep records for three years in the general case. This is the default period that applies to the vast majority of standard business tax returns. A solo owner can cycle out receipts and invoices past this three-year mark only when none of the exceptions below, and no longer payroll or state rule, applies.

However, that default period applies unless one of three distinct exceptions does. The first exception involves omitted income, which carries a much longer penalty. If you do not report income that you should report and it is more than 25 percent of the gross income shown on your return, you must keep records for six years. The second exception covers a failure to file a return completely. You must keep records indefinitely if you do not file a return at all. The third exception addresses fraudulent filings. You must keep records indefinitely if you file a fraudulent return.

Other specific tax situations trigger different timelines entirely under federal law. The Internal Revenue Service requires you to keep records for seven years for a claim for a loss from worthless securities or a bad debt deduction. Employment tax records require a different schedule that employers must monitor closely. You must keep employment tax records at least four years after the date the tax becomes due or is paid, whichever is later. A solo business owner who scales up and hires even a single part-time employee must adhere to this four-year rule.

Labor and State Recordkeeping Rules

Federal tax law is not the only source of recordkeeping mandates. The U.S. Department of Labor maintains its own strict rules for employers under the Fair Labor Standards Act. Fact Sheet 21 dictates that each employer shall preserve for at least three years payroll records, collective bargaining agreements, sales and purchase records. This three-year rule forms the baseline for federal wage and hour compliance. It ensures an inspector can verify proper minimum wage payments and overtime calculations if a dispute arises.

The Department of Labor also requires employers to retain FLSA supporting records for two years. These specific supporting records include time cards, piece work tickets, wage rate tables, work and time schedules, and records of additions to or deductions from wages. A solo owner hiring independent contractors or part-time help must carefully separate these two-year records from their three-year general payroll files. Organizing them by year makes it much easier to purge older records safely and remain compliant.

State regulators apply their own retention periods that often exceed federal minimums. In California, the California Department of Tax and Fee Administration outlines rules in Publication 116. The agency states that businesses must keep California sales and use tax records for at least four years. The rule extends if your business is being audited. You must retain all records covering the audit period until the audit is complete.

Comparing Bookkeeping Services for Solo Owners

A solo business owner must choose a service capable of meeting all these official retention and documentation rules. The market offers a wide variety of approaches, from flat-rate bookkeepers to complex software bundles. The following providers are listed alphabetically rather than as a ranking.

Bench provides a proprietary software platform paired with an in-house team of professional bookkeepers. Rather than building on an existing ledger, Bench keeps all your financial data inside its own closed system. As of October 6, 2026, Bench Bookkeeping Light costs $199 per month. The standard Bookkeeping tier is $399 per month. The Bookkeeping + Tax tier is $649 per month. If you need specialized fractional help, a fractional bookkeeper is $55 per hour plus a $1,200 onboarding fee. Bench offers a highly polished experience, but the price points may easily stretch the budget of a solo operator.

Bookkeeper360 operates as a versatile financial support firm. The company provides everything from basic monthly reconciliation to hands-on weekly accounting. Bookkeeper360 integrates well with standard cloud accounting tools. As of October 6, 2026, monthly bookkeeping starts from $399 per month. Weekly bookkeeping starts from $599 per month. Payroll administration is available from $200 per month and onboarding starts from $1,000. These rates reflect a service designed for established, growing companies rather than a single-person startup looking for baseline affordability.

Merritt Bookkeeping takes a completely different approach to the market by focusing on extreme simplicity. The company ignores tiered pricing entirely. Merritt Bookkeeping charges a flat $250 per month as of October 6, 2026. This features a single flat tier with no contract. For a solo business owner who wants an affordable bookkeeping service, this flat-rate model is highly compelling. It removes the fear of unexpected invoices and provides exactly the monthly reconciliation a small operation needs without forcing them into an expensive software bundle.

Pilot focuses heavily on venture-backed startups and high-growth technology companies. Unlike Bench, Pilot requires you to use QuickBooks Online as your primary accounting ledger. As of October 6, 2026, the Pilot Essentials plan is $99 per month. The Essentials tier covers up to $100,000 in monthly expenses. The Core and Custom tiers are quote-only. Pilot excels at complex startup accounting, but its quote-only scaling makes it difficult for a solo business owner to forecast long-term costs.

QuickBooks Experts is Intuit's own in-house bookkeeping service network. QuickBooks Experts connects you with a professional who helps manage your books directly inside your QuickBooks account. This keeps your software and your human support under one corporate roof. However, Intuit does not publish a price on its pricing page for this assisted bookkeeping service as of October 6, 2026. Because no usable published price exists, a solo owner must undergo a consultation simply to discover the baseline cost.

Wave Advisors offers a unique value proposition by building on top of a free software tier. Wave provides its core accounting tools at no monthly cost. Wave Advisors acts as the paid human support layer on top of that free foundation. As of October 6, 2026, this bookkeeping service starts from $149 per month. A solo owner can use the free software for daily invoicing and only pay the monthly fee for professional reconciliation and review.

ZenBusiness Money Pro approaches the problem directly from the perspective of a new business founder. ZenBusiness is fundamentally a formation and compliance company that bundles financial tools into its broader ecosystem. The ZenBusiness Money Pro product costs $30 per month as of October 6, 2026. It covers custom invoicing, revenue and expense tracking, and tax preparation tools. A reader looking for a single provider to manage their entity formation, registered agent compliance, and basic bookkeeping will find this combination highly efficient.

Bench vs Pilot: The Direct Comparison

The choice between Bench and Pilot often dominates discussions about outsourced startup accounting. A solo business owner must understand how their distinct models impact daily operations. Bench traps your data inside its own proprietary software environment. This means you do not have to pay for a separate accounting subscription. However, it also means migrating away from Bench requires exporting your data into an entirely new format if you ever leave.

Pilot takes the opposite approach by using an external ledger. Pilot does the heavy lifting, but the data lives permanently in your own QuickBooks Online account. If you outgrow Pilot or decide to hire an in-house accountant, you simply revoke their access and keep your file intact. The Pilot Essentials tier at $99 per month is technically cheaper than the Bench Light tier at $199 per month. Neither provider ultimately serves the purely affordable, solo-owner market as well as simpler alternatives like Merritt Bookkeeping or ZenBusiness.

A solo business owner should start by evaluating their entity and compliance needs first. Forming the business correctly and separating checking accounts solves the most common financial problems. Once those structural elements are firmly in place, selecting a tool based on transparent pricing ensures long-term stability.

Sources

This article provides general information and is not intended as legal, tax or accounting advice, and local requirements vary and change over time.