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Tax Planning for S Corp Owners: 2026 Guide
Updated: Oct 22
Table of Contents
Tax Planning for S Corp Owners: Start With the Basics
How Pass-Through Taxation Works for an Owner-Employee
Why a Reasonable Salary for an S Corp Owner Comes First
Salary vs. Shareholder Distributions: The Split That Saves Payroll Tax
S Corp Accountable Plan Requirements You Should Meet
What Belongs in Your Written Reimbursement Policy
Your S Corp Tax Deductions Checklist for the Year
Stock Basis, Debt Basis, and Why They Decide What You Keep
Retirement and Year-End Moves That Lower Your Tax Bill
Solo 401(k) Mechanics for an Owner-Employee
When a Cash Balance Plan Makes Sense
Your Year-End Tax Planning Checklist
State Rules, Automated Workflows, and TCJA Sunset Planning
State Rules That Trip Up New S Corp Owners
Automated Workflows That Keep You Compliant
Post-TCJA Sunset Planning
Frequently Asked Questions
Last Updated: October 2, 2026
Tax Planning for S Corp Owners: Start With the Basics
Tax planning for S Corp owners begins with one core idea: the entity itself usually pays no federal income tax. Instead, profits and losses flow through to the owners' personal returns. This guide from McCrary Tax Prep walks new owner-employees through the moves that actually matter, from setting a reasonable salary to tracking basis so distributions stay tax-free.
An S corporation is a pass-through entity, meaning the business's income, deductions, and credits pass directly to shareholders and get reported on their personal returns (S corporations). The corporation files its own return, but the tax liability lands on the owners.
Pass-through entity taxation is the system where a business's profits are taxed once, at the owner level, rather than at both the corporate and personal level. That single layer of tax is the main reason owners elect S Corp status in the first place.
How Pass-Through Taxation Works for an Owner-Employee
An owner-employee wears two hats. As an employee, you receive a W-2 and pay payroll taxes on your wages. As a shareholder, you receive distributions, which generally are not subject to self-employment tax.
That split is the whole ballgame. Wages are taxed for Social Security and Medicare; distributions typically are not. The IRS instructions for S corporations explain how income and losses pass through to shareholders each year.
A common mistake is treating every dollar pulled from the business as a distribution. The IRS expects a reasonable wage first.
Why a Reasonable Salary for an S Corp Owner Comes First
A reasonable salary for an S Corp owner is the wage the business pays for the work you actually perform, and it must be set before any distributions are calculated.
There is no single formula. Many advisors look at what you would pay someone else to do your job, your industry norms, your training, and your time commitment. Document how you reached the number.
Salary vs. Shareholder Distributions: The Split That Saves Payroll Tax
Shareholder distributions are payments from profits to owners, and they generally avoid self-employment tax. Salary does not. That difference is where payroll tax savings come from.
Payment Type | Payroll Tax | Reported On |
Reasonable salary | Yes | W-2 |
Shareholder distribution | Generally no | Schedule K-1 |
Watch Out Paying yourself zero salary while taking large distributions is one of the fastest ways to draw IRS attention. The consequence is back payroll taxes, penalties, and interest.
S Corp Accountable Plan Requirements You Should Meet
An accountable plan lets the business reimburse you for legitimate business expenses without those reimbursements counting as taxable income. To qualify, the plan needs three things: a business connection, substantiation of the expense, and return of any excess.
Boris Musheyev, CPA
What Belongs in Your Written Reimbursement Policy
A written reimbursement policy should spell out which expenses qualify, how you document them, and the deadline for submitting claims. Common items include mileage, home office costs, and travel.
State that only ordinary and necessary business expenses qualify
Require receipts and a business purpose for each claim
Set a submission deadline, such as 60 days
Require repayment of any unsubstantiated advances
Pro Tip The thing nobody tells you about accountable plans is that the paperwork is the plan. A policy with no substantiation behind it fails the same test as having no policy at all.
Your S Corp Tax Deductions Checklist for the Year
An S Corp tax deductions checklist keeps you from missing write-offs that quietly lower your taxable income. Run through it quarterly, not just in April.
Health insurance premiums paid on behalf of the owner-employee
Retirement plan contributions
Business mileage and vehicle costs
Home office expenses under an accountable plan
Professional fees, software, and supplies
Qualified business income considerations for your personal return
For questions about how these apply to your situation, book a tax appointment with a professional who can review your records.
Stock Basis, Debt Basis, and Why They Decide What You Keep
Stock basis is your investment in the company, and debt basis is what the company owes you directly. Together they set the ceiling on how much you can take as tax-free distributions.
Basis rises with income and contributions and falls with losses and distributions. If distributions exceed your basis, the excess becomes taxable, which surprises owners who assumed every distribution was tax-free.
Key Takeaway Basis tracking is not busywork. It is the record that proves your tax-free distributions were actually tax-free.
Retirement and Year-End Moves That Lower Your Tax Bill
Retirement plans are one of the few levers that reduce taxable income and build long-term savings at the same time. For a new S Corp owner-employee, the two workhorses are the Solo 401(k) and the cash balance plan.
Solo 401(k) Mechanics for an Owner-Employee
A Solo 401(k), sometimes called an individual 401(k), lets you contribute in two roles. As the employee, you can defer a portion of your W-2 wages. As the employer, the business can contribute an additional amount based on your compensation.
The employee deferral is capped each year by the IRS, and catch-up contributions are available once you reach age 50.
When a Cash Balance Plan Makes Sense
A cash balance plan is a defined benefit plan that lets higher earners contribute well beyond what a Solo 401(k) allows. It works best when the business has steady, predictable profits and the owner wants to shelter a large chunk of income. The trade-off is complexity: you will need an actuary, annual filings, and a commitment to fund the plan in good years and bad.
Your Year-End Tax Planning Checklist
Year-end planning matters because several decisions must be locked in before December 31. Run through this list in the fall, not the last week of December.
Confirm your salary for the year is still defensible as reasonable compensation
Decide whether to declare an additional distribution before year-end or wait
Fund your Solo 401(k) employee deferral (calendar-year plans require it by December 31)
Make any employer profit-sharing contribution by your plan's deadline, which may extend to your tax filing deadline
Review basis records so you know how much you can distribute tax-free
Check whether equipment purchases qualify for Section 179 or bonus depreciation
Confirm estimated tax payments are on track to avoid underpayment penalties
Review health insurance premium treatment for the owner-employee
Move | When To Act | Why It Helps |
Set or adjust salary | Before year-end | Keeps reasonable comp defensible and unlocks retirement contributions |
Fund Solo 401(k) deferral | By December 31 for calendar-year plans | Lowers taxable income dollar for dollar |
Make employer profit-sharing contribution | By plan or filing deadline | Adds another deduction on top of the deferral |
Review basis records | Quarterly | Protects tax-free distributions |
Confirm estimated payments | Each quarter | Avoids underpayment penalties |
Pro Tip A common pattern among new S Corp owners is to wait until April to think about retirement contributions. By then, the deferral deadline for a calendar-year Solo 401(k) has usually passed. Set a calendar reminder for early December.
For questions about which plan fits your situation, book a tax appointment with a professional who can model the numbers for you.
State Rules, Automated Workflows, and TCJA Sunset Planning
Most S Corp guides stop at the federal rules. That leaves three angles on the table that matter a great deal to a new owner-employee: state treatment, automated compliance, and the coming sunset of several 2017 tax law provisions.
State Rules That Trip Up New S Corp Owners
Federal S Corp status does not automatically carry over to every state. A few patterns show up again and again:
Automatic recognition. Many states follow the federal election and treat your S Corp the same way for state income tax purposes.
Separate state election required. Some states require you to file a separate state-level S election or make a state-specific filing, even if your federal election is already in place.
Entity-level state tax. A handful of states impose a tax or fee at the entity level, sometimes calculated on gross receipts rather than net income, in addition to what shareholders pay on their personal returns.
Composite or withholding requirements. Some states require the S Corp to withhold or make composite payments on behalf of nonresident shareholders.
Because these rules vary so widely, the practical move is to list every state where you have payroll, property, or sales, then confirm the filing and tax treatment for each one. A Small Business Consultation can help you map that out before you file.
Automated Workflows That Keep You Compliant
Automation is not about replacing your judgment, it is about making sure the recurring tasks actually happen. A simple stack looks like this:
Payroll software that runs your W-2 wages on a fixed schedule and withholds the right amounts
Quarterly estimated tax reminders set on your calendar for the same dates every year
A shared basis-tracking spreadsheet updated after every distribution, contribution, or loss
A document folder for receipts, mileage logs, and accountable plan substantiation
A state filing calendar listing every state where you operate and the deadline for each
Many businesses find that simple systems beat memory every time. The goal is that no deadline depends on you remembering it.
Post-TCJA Sunset Planning
The 2017 tax law, commonly called TCJA, included several provisions that are scheduled to change after 2025 unless Congress acts. For S Corp owners, the ones worth watching include:
The qualified business income deduction under Section 199A, which reduces tax on pass-through income for many owners
Individual income tax rate brackets, which affect the rate applied to your pass-through income
The estate and gift tax exemption, which matters if you are planning to pass the business to the next generation
Bonus depreciation rules for qualified property placed in service
Because these rules can shift, the smart play is to plan for both scenarios. If you are considering a large purchase, a Roth conversion, or a gifting strategy, run the numbers under current law and under a sunset scenario before you commit. Confirm current details with the IRS newsroom updates or a qualified tax professional before acting.
Key Takeaway The owners who come out ahead of a sunset are the ones who started modeling the change a year or two early, not the ones who read about it in April.
For questions about how state rules or sunset provisions apply to your business, book a business consultation so you can walk through your specific footprint.
Frequently Asked Questions
What is the reasonable salary requirement for S Corp owners?
The IRS requires an owner-employee to take reasonable compensation before any shareholder distributions. There is no fixed percentage, so the right number depends on your industry, your duties, your hours, and what similar businesses pay. A bookkeeper earning $60,000 in wages should not pay themselves $20,000 just to shrink payroll tax. Document how you set the figure and revisit it each year. If you are unsure, book a tax appointment so your salary holds up under review.
How does S Corp pass-through taxation work?
An S Corp is a pass-through entity. The corporation files its own return but generally pays no federal income tax at the entity level. Profit and loss flow to your personal return, which avoids the double taxation a C-Corp can trigger. You pay federal income tax on your share, plus payroll tax on the salary you take. Distributions of remaining profit are not subject to self-employment tax, which is the main reason owners elect S Corp status in the first place.
What are the most common tax mistakes new S Corp owners make?
The big ones: paying yourself nothing or an unrealistically low salary, skipping a written accountable plan, commingling personal and business funds, and forgetting to track stock basis. Owners also miss the year-end window for retirement contributions and equipment purchases. Each mistake either raises your tax liability or invites IRS questions. A short mid-year review with a tax professional catches most of them before filing season, when fixes get expensive.
How do I set up an accountable plan for my S Corp?
Put the policy in writing, require employees to substantiate expenses within a set time, and reimburse only business-connected costs. The plan should cover mileage, home office, travel, and supplies, with receipts kept for every claim. Reimbursements under a compliant accountable plan are excluded from wages, so no payroll tax applies. Review the policy annually and update it when your spending changes. A business consultation can help you draft one that fits how you actually operate.
What deductions are available specifically for S Corp owners?
Common ones include the employer half of payroll tax, health insurance premiums, retirement plan contributions, business mileage, home office costs, and the qualified business income deduction where you qualify. Section 179 and bonus depreciation can shelter larger equipment purchases. Cost segregation may help if you own commercial property. Keep every receipt and log, because the deduction is only as good as your records. Work from a checklist each quarter rather than scrambling in April.
What is the 70/30 rule for S Corp?
It is a rule of thumb some owners use, splitting profit 70 percent to salary and 30 percent to distributions. It is not an IRS rule and it does not fit every business. A service company with one owner doing all the billable work usually needs a higher salary percentage than a product business with equipment and staff. Treat any fixed ratio as a starting point, then test it against industry pay data. Your actual facts decide reasonable compensation.
What is the 5 year rule for S Corp?
Once you elect S Corp status, the election generally stays in place unless you revoke it. If you revoke, the IRS generally will not accept a new election for five tax years without consent. That makes the initial decision worth getting right. Owners who elect too early, before profits justify the payroll and filing costs, sometimes regret it. Talk through the timing before you file the election so you are not locked out of a better structure.
S Corp ownership gets complicated fast, and the details that protect your payroll tax savings are easy to miss without help. McCrary Tax Prep offers year-round tax support, personalized tax strategy, and small-business expertise to keep you compliant and organized. Book a business consultation for your business questions and a tax appointment for your tax questions, and let a trusted team handle the filings while you run the company.
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