The same profit can be taxed very differently depending on the structure, the salary you pay yourself and what goes into a retirement plan. Most of these choices must be made before year-end. We compute the tax under each option, then you decide.
Fixed feesQuoted first, work starts after you confirm
English · 中文A multi-state licensed CPA leads the work
Why plan
What owners often do, and what planning compares
Many structures were chosen on day one and never revisited, though profit has multiplied since.
What owners often do
Form an LLC and file as a sole proprietor ever after
Switch to an S-corp on a friend’s advice without running numbers
Mix business and household money
Ask "what else can I deduct?" at filing time
What planning compares
Full-year tax as you are and as an S-corp
How salary level moves SE tax, the QBI deduction and retirement room
Which costs the business can properly carry
What can still be done before year-end, and its effect
These choices are linked: a lower salary cuts payroll tax but can also shrink the QBI limit and the amount a retirement plan can take. They have to be computed together, not one at a time.
When
Four points in time
Most arrangements must be in place by December 31.
1At start-up or when profit jumps
Compare LLC, S-corp and C-corp
Decide on the S election
Set up payroll and books
Separate business and personal accounts
2Mid-year, every year
Update the projection with actual profit
Check the salary level
Adjust quarterly estimates
Assess a retirement plan
3The fourth quarter
Year-end bonus and distributions
Timing of equipment purchases
Retirement contributions and family wages
State pass-through entity tax election
4Before a sale or a new partner
Asset sale or stock sale
Whether to restructure ahead
Estimates for the year of sale
What to keep and reinvest
One by one
Eight matters, one by one
Not all of them suit you. Step one is deciding which are worth doing.
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LLC, S-corp or C-corp
Net profit of a sole proprietor or single-member LLC bears 15.3% self-employment tax (the Social Security part stops at $184,500 for 2026). An LLC can elect S-corp taxation without changing its state-law form.
Planning looks at
Profit level, employees, plans to raise money or sell, and what your state charges each kind of entity.
An owner-employee must be paid reasonable wages, with payroll tax, before distributions — which then carry no payroll tax. If wages are too low the IRS can reclassify distributions as wages.
Planning looks at
Your duties, pay in your industry, the company’s profit, and what salary does to other deductions.
Up to 20% of qualified business income is deductible, now permanently. For 2026, above $201,750 of taxable income ($403,500 joint) wage and property limits phase in and specified service trades phase out. Wages paid to the owner are not QBI.
Planning looks at
Where your taxable income falls, whether your trade is a specified service, and the ratio of wages to profit.
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Retirement plans
For 2026 a solo 401(k) takes up to $24,500 as employee (more from age 50) and up to $72,000 in total with the employer part. A cash balance or other defined benefit plan allows larger, actuarially determined deductions.
Planning looks at
Your age, how steady profit is, whether you have employees, and how much you want to put away.
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Costs the business carries
Under a proper reimbursement plan, substantiated business expenses repaid to an employee — the owner included — are not wages. Renting your home to the business for meetings on no more than 14 days a year keeps the rent out of your income, but only at a documented market rate for real business use.
Planning looks at
How home office, vehicle and travel costs are handled now, and the policy and records still needed.
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Family on the payroll
Children who really work for reasonable pay can be on payroll. A child under 18 employed by a parent’s sole proprietorship (or the parents’ partnership) is exempt from Social Security and Medicare tax; a corporation, S-corps included, is not.
Planning looks at
The work actually done, the pay and records, and your entity type.
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State tax and pass-through entity tax
Many states let partnerships and S-corps elect to pay state income tax at the entity level; that tax is deducted federally by the entity, outside the individual cap on state tax deductions.
Planning looks at
Whether your state offers the election, its deadlines and payment dates, and your own state tax deduction.
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Equipment, vehicles and health insurance
For 2026 up to $2,560,000 of equipment can be expensed under section 179, and qualifying property acquired after January 19, 2025 can be depreciated 100% in the first year. Health premiums of a more-than-2% S-corp shareholder must run through W-2 wages to be deductible.
Planning looks at
Planned purchases, acquisition and in-service dates, and how health insurance is handled now.
Common mistakes
Where owners most often go wrong
Usually because the pieces were never computed together.
1Electing S-corp without running numbersAt modest profit the payroll and return costs can exceed the tax saved.
2Paying yourself too littleReclassification brings payroll tax, interest and penalties — and less retirement room.
3Becoming an S-corp but skipping payroll filingsQuarterly payroll returns, W-2s and state unemployment all have deadlines.
4Forgetting quarterly estimatesUnderpayment is penalized. Paying 100% of last year’s tax (110% at higher incomes) avoids it.
5Mixing business and personal moneyUnclear costs are hard to deduct in an audit and weaken the entity’s protection.
6Thinking of planning in late DecemberRetirement plans, purchases and salary changes often need weeks or months.
How we work
Three steps, from question to plan
The same levels as our tax planning service, built around your business.
01
Paid consultation
Go through the business and the questions on your mind. The CPA explains the rules and options; you receive a written recap.
Fee15 / 30 / 60 minutes — prices on the booking page; credited if you move to planning within 30 days
02
Written tax plan
Structure, salary, QBI, retirement plans and more computed one by one, full-year tax compared across options, written up and explained.
FeeFrom $2,000; a fixed fee is quoted once the scope is set
03
Annual advisory
Quarterly reviews of profit and estimates, and a year-end pass over the year’s arrangements; payroll, books and returns can come to us too.
There is no fixed number. It is the self-employment tax saved against payroll, a corporate return and state charges — and it depends on the salary. We compute it with your figures.
How is reasonable salary set?
By what you do, the time you spend and what the role pays in your industry. There is no official formula, but it needs support and a record.
Is it too late to elect S-corp this year?
The election is generally due within two and a half months of the start of the tax year. Late-election relief exists but has conditions.
Can I pay my children?
Yes, if they really work, the pay matches the work and records are kept. Whether payroll tax is waived depends on your entity type.
Can I rent my home to my company for meetings?
The rule allows it, but the rent must be a supported market rate for meetings with a real, recorded business purpose. The Tax Court has allowed far less than a taxpayer claimed, so care is needed.
When must a retirement plan be set up?
Deadlines differ by plan, and some fall before year-end. Start looking in the third quarter.
Do you also do payroll and bookkeeping?
Yes. Payroll, books and business and personal returns can all come to us, or planning alone.
How are fees set?
Fixed fees, quoted before work starts. They follow the scope and complexity of the work, never the amount of tax saved.
Request
Tell us about your business
About 3 minutes. Sending a request costs nothing and is not an engagement.
We reply by e-mail or phone within 2 business days
We confirm the scope, documents and fixed fee first
Work starts only after you confirm — no charge before that
Only one question to settle first?
Book a one-on-one paid consultation with a CPA. The fee is credited if you move on to planning.
This page is general information, not tax advice for your situation. Conclusions depend on the facts you provide and the law in force; the dollar amounts are 2026 figures, adjusted each year, and state rules differ.