The First-Year Setup Guide: S-Corp, Salary, and Quarterly Taxes

Does an S-corp make sense for you?

The S-corp election is not a default. It’s a decision — and it only makes financial sense above a certain income level. Below that threshold, the cost of administration (payroll, a separate business return, additional CPA fees) exceeds the self-employment tax savings.

If your net profit is consistently above $60–80k and you expect it to stay there, the math usually works. If you’re at $40k in your first year and growing, it may make sense to plan for the election now rather than scrambling to do it mid-year later.

The math in simple terms

As a sole proprietor or single-member LLC, 100% of your net profit is subject to self-employment tax at 15.3% (on the first ~$176k). As an S-corp, you pay FICA only on your W-2 salary — not on distributions.

The savings grow as profit grows. A $300k business might save $20,000+ per year with the right structure.

When to make the S-corp election

To be treated as an S-corp for a given tax year, you generally need to file Form 2553 by March 15 of that year (or within 75 days of formation for a new entity). Late elections are possible — the IRS grants relief in many cases — but early is simpler.

• New LLC: you can elect S-corp status within 75 days of formation
• Existing LLC: elect by March 15 to apply for the current year
• Late election relief: available if you have reasonable cause and have been operating as if the election had been in effect

Setting your W-2 salary

Once you have an S-corp, you must pay yourself a reasonable W-2 salary before taking distributions. This is not optional — the IRS has challenged and won cases against owners who paid themselves $0 or token salaries while taking large distributions.

“Reasonable” is defined by what you’d pay someone else to perform your duties. The IRS uses BLS wage data and comparable salary surveys. Your defensible range depends on:

• Your specific role and responsibilities
• The industry you operate in
• Gross revenue of the business
• Hours worked and level of skill required

The salary isn’t just a tax lever — it’s the foundation of your entire compensation structure. Get it right from the start.

Payroll: what you actually need to do

Running payroll as an S-corp owner is not optional — and it’s not as complicated as it sounds. The basic requirements:

• Set up payroll with a service (Gusto, ADP, Rippling, or similar) — do not try to process payroll manually
• Run payroll at least quarterly; monthly or semi-monthly is cleaner
• Withhold federal income tax, Social Security, and Medicare from each paycheck
• Deposit payroll taxes to the IRS on schedule (usually semi-weekly or monthly)
• File quarterly payroll returns (Form 941) and annual returns (940, W-2, W-3)

Budget roughly $500–1,500/year for payroll software as a small owner. It’s a deductible business expense and much cheaper than the penalties for getting it wrong.

Building your quarterly tax routine

Most first-year business owners are blindsided by their first tax bill because they didn’t build a quarterly routine. The solution is simple: set aside money as you earn it and make estimated payments on schedule.

The quarterly rhythm

• End of each quarter: Update your profit-and-loss statement. Estimate where the year is heading.
• By the due date: Make your federal estimated payment (April 15, June 16, September 15, January 15).
• By October/November: Do a year-end tax review with your CPA to size the Q4 payment correctly.
• December: Make any final retirement contributions, bonus depreciation decisions, or other year-end moves.

Your W-2 withholding counts toward your estimated payment obligation. If your salary is meaningful relative to your total income, you may owe less in additional estimated payments than you expect.

Retirement contributions from day one

One of the most powerful tax advantages available to S-corp owners is the ability to make large retirement contributions that reduce your taxable income. Many first-year owners don’t take advantage of this because they’re focused on getting the business running — and end up leaving significant tax savings on the table.

For S-corp owners, the Solo 401(k) is usually the best vehicle. You can contribute as both the employee (deferral) and the employer (match), allowing contributions up to $70,000 in 2026.