Bookkeeping Business Structure: S-Corp, SSTB Classification, and the QBI Limitation

Bookkeeping businesses are classified as specified service trades or businesses (SSTBs) under IRC 199A. The Treasury regulations at Treas. Reg. 1.199A-5(b)(2)(ii) define “accounting” to include bookkeeping services. This means the 20% QBI deduction phases out for bookkeeping business owners with taxable income above $266,950 (single) or $533,900 (married filing jointly) under the OBBBA thresholds.

When does the S-Corp election make sense for a bookkeeper?

What’s the reasonable salary for a bookkeeper?

The BLS data and salary surveys provide benchmarks:

• Entry-level bookkeeper: $35,000-$45,000
• Experienced full-charge bookkeeper: $45,000-$60,000
• Bookkeeping firm owner (managing multiple clients): $55,000-$75,000

The salary should reflect what an equivalent employee would earn for the same work. A bookkeeping firm owner who manages 30 clients and does all the bookkeeping personally should set a salary comparable to a senior bookkeeper in their market. A firm owner who manages staff and focuses on client acquisition can set a lower salary reflecting the management role (since staff handle the bookkeeping).

What about virtual bookkeeping businesses?

Virtual bookkeeping businesses (no physical office, all clients remote) have the same SSTB classification and entity structure considerations as traditional bookkeeping firms. The primary difference is the expense profile: no office rent, but higher technology costs (cloud accounting software, video conferencing, document management). The home office deduction is available for the dedicated workspace. The S-Corp analysis is identical.

When does it make sense to elect S-Corp taxation for my LLC?

The general rule of thumb is when your net self-employment income consistently exceeds $40,000-50,000 annually. Below that, the S-Corp’s added compliance costs (payroll processing, quarterly payroll tax filings, a separate corporate return) often exceed the FICA savings. The calculation is straightforward: an S-Corp pays FICA only on the owner’s reasonable salary, not on distributions above that salary. If your LLC earns $100,000 and a reasonable salary is $60,000, you save roughly $6,120 in self-employment tax on the $40,000 distributed as profit (15.3% x $40,000). Subtract $2,000-3,000 in added compliance costs for payroll and the separate S-Corp return, and you net $3,000-4,000 in annual savings. File Form 2553 by March 15 for a calendar-year election, or within 75 days of forming the LLC for a mid-year start.

Related guides:

• Tax Planning for Veterinary Practices: Equipment Depreciation, Entity Structure, and Retirement Plan Strategies

• Tax Planning for Law Firms and Attorneys: SSTB Classification, S-Corp Structure, Trust Accounting, and Retirement Plans

• Tax Planning for Physicians and Medical Practices: S-Corp Structure, Retirement Plans, and SSTB Considerations

• Tax Planning for Architecture and Engineering Firms: SSTB Classification, Project Accounting, and Entity Structure

• Tax Deductions for Coaches: Life Coaching, Business Coaching, and the SSTB Question

• Retirement Plans for Bookkeeping Businesses: Solo 401(k), the SSTB Limitation, and the Threshold Strategy

• Tax Deductions for Bookkeeping Businesses: Software, Training, and Professional Expenses

• Tax Planning for Accounting Firms and CPA Practices, the SSTB classification, partner buy-in structures, and practice valuation rules that apply to accounting and CPA firms above the bookkeeping tier

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.