How a Solo Consultant Cut Their Effective Tax Rate by 11 Points in 18 Months
Sam's List Editorial | 2026-06-06
How a Solo Consultant Cut Their Effective Tax Rate by 11 Points in 18 Months Filing as a sole proprietor when you're earning $280,000 a year is one of the most expensive decisions a self-employed person can make. Not because sole proprietorship is wrong for everyone — but because at that income level, the tax math has structurally better answers. This is the case of a solo management consultant who was leaving roughly $30,000 per year on the table, and how CPA on Fire fixed it in three moves. The Starting Point: $280K, Sole Proprietor, 31% Combined Rate The client was a management consultant earning $280,000 per year in net self-employment income. No employees. No partners. Full Schedule C filer. At that income level, sole proprietorship carries a specific tax burden that most people undercount. There's federal income tax — at $280K of net SE income, the effective rate on that vetted income puts a significant portion into the 32% and 24% brackets. And then there's the self-employment tax. Self-employment tax runs at 15.3% on the first $176,100 of net SE income (2026 rate — the Social Security wage base adjusts annually) and 2.9% on everything above that. The consultant was paying SE tax on the full $280,000 of net income. That's $33,915 in SE tax before a dollar of income tax. Combined federal effective rate: 31%. That number is not unusual for a sole proprietor at this income level. It's also not necessary. Step One: The S-Corp Election The first move was an S-corp election. An S-corp does not, by itself, reduce income tax. What it does is change how self-employment tax applies to the income. As a sole proprietor, every dollar of net profit is subject to SE tax. As an S-corp owner, only the W-2 salary you pay yourself is subject to employment tax (the employer equivalent of SE tax). The remaining profit flows as a distribution and is not subject to employment tax. CPA on Fire established a reasonable salary of $130,000 for the consultant's S-corp. That figure was benchmarked to what the market pays a management consultant at that billing rate — a number the IRS requires to be defensible and consistent with industry compensation. With a $130,000 salary and $150,000 in distributions, the employment tax base dropped by $150,000. The SE tax savings on $150,000 of income removed from the employment tax base: approximately $11,500 per year. That one structural change pays for a year of quality CPA services. Repeatedly. Step Two: QBI Deduction Optimization The Tax Cuts and Jobs Act created the Section 199A qualified business income deduction — 20% of qualified...
