Advanced tax strategies for LLCs and partnerships live in one place: changing how pass-through income is classified, sheltered, and deducted, rather than hunting for more write-offs. Once ordinary business expenses stop moving the needle, the meaningful savings come from an S corporation election, the qualified business income deduction, a defined benefit retirement plan, partnership basis adjustments under Section 754, and a state pass-through entity tax election. Each has eligibility rules and compliance costs, and the order you layer them in depends on your income level and what kind of business you run.
Electing S Corporation Status to Cut Self-Employment Tax
The most widely used strategy is electing S corporation status for an existing LLC. You file IRS Form 2553, and the IRS then treats your entity’s income in two buckets: a salary you pay yourself and distributions of remaining profit.1Internal Revenue Service. About Form 2553, Election by a Small Business Corporation The salary carries the combined 12.4% Social Security tax and 2.9% Medicare tax. Distributions do not. That gap is where the savings live.
The math is less dramatic than it first sounds, because Social Security tax only applies to earnings up to $184,500 in 2026.2Social Security Administration. Contribution and Benefit Base Above that ceiling, only the 2.9% Medicare tax continues, plus an additional 0.9% Medicare surtax on earnings above $200,000.3Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates If your LLC nets $250,000 and you set your salary at $100,000, the distributions avoid the 2.9% Medicare tax (about $4,350) and potentially the 0.9% surtax, but they don’t escape the full 15.3%, because much of that income would already sit above the Social Security ceiling. The payoff grows as the business earns further into six figures and the salary stays at a defensible level.
Setting a Reasonable Salary
The IRS requires that your salary reflect what someone with your skills, duties, and experience would earn doing the same work for an unrelated employer. No bright-line number exists in the tax code. Courts have weighed training and experience, hours spent on the business, what non-owner employees are paid, and what comparable businesses pay for similar roles.4Internal Revenue Service. Wage Compensation for S Corporation Officers If the IRS decides your salary is artificially low, it can reclassify distributions as wages and assess back payroll taxes, interest, and penalties. Most practitioners rely on compensation surveys or industry benchmarks and keep that documentation in the entity’s permanent file.
Who Can Actually Elect
Not every LLC qualifies. S corporation status limits you to 100 shareholders, one class of ownership interest, and U.S.-resident individual owners only. Partnerships, other corporations, and nonresident aliens cannot hold shares.5Internal Revenue Service. S Corporations The election must be filed no more than two months and 15 days after the start of the tax year in which you want it to take effect, or any time during the preceding tax year.6Internal Revenue Service. Instructions for Form 2553 Late-election relief exists under Revenue Procedure 2013-30 with reasonable cause, filed within three years and 75 days of the intended effective date.
The Qualified Business Income Deduction
The Section 199A deduction lets owners of pass-through entities subtract a percentage of their qualified business income before calculating their personal tax bill. Originally set at 20% under the 2017 Tax Cuts and Jobs Act, the deduction was made permanent and increased to 23% under the One Big Beautiful Bill Act for tax years beginning in 2026.7Internal Revenue Service. Qualified Business Income Deduction On $300,000 of qualifying income, that’s $69,000 off taxable income before any other deductions apply.
The full deduction is available to single filers with taxable income up to $201,750 and joint filers up to $403,500 for 2026. Above those thresholds, it phases out over a range that tops out at $276,750 for single filers and $553,500 for joint filers.8Internal Revenue Service. Rev. Proc. 2025-32 What happens inside the phase-out depends on what kind of business you run.
Service Businesses Versus Everyone Else
Businesses in law, medicine, consulting, financial services, and performing arts are classified as specified service trades. For owners in these fields, the deduction shrinks within the phase-in range and disappears entirely once income crosses the upper threshold.9Office of the Law Revision Counsel. 26 U.S. Code 199A – Qualified Business Income A doctor filing jointly with $560,000 in taxable income gets nothing from this provision.
Owners of non-service businesses (manufacturing, retail, construction, and the like) face a different test. Their deduction is capped at the greater of 50% of the W-2 wages the business pays, or 25% of those wages plus 2.5% of the original cost of the business’s depreciable property.9Office of the Law Revision Counsel. 26 U.S. Code 199A – Qualified Business Income A manufacturing LLC with heavy equipment can still qualify for a substantial deduction at very high income levels. A lean consulting firm with few employees gets squeezed out. That contrast is one reason high-income owners of service businesses turn to the S corporation election and retirement plan strategies instead.
Defined Benefit Plans for High-Earning Owners
The 401(k) contribution limit tops out at $24,500 for 2026, or $32,500 with the standard catch-up for those 50 and older.10Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026 High-earning LLC and partnership owners often hit that ceiling long before their tax problem is solved. A defined benefit pension plan works on a different scale. Instead of a fixed contribution cap, an actuary calculates how much the plan needs each year to fund a target retirement benefit of up to $290,000 annually. For an owner in their late 50s with a high income, deductible contributions can reach $200,000 or more because the plan has fewer years to accumulate the needed funds.
Those contributions flow through the business, reducing the net income that passes through to owners’ personal returns. A partner contributing $180,000 to a defined benefit plan drops their pass-through income by that same amount, generating federal tax savings that no defined contribution plan can match. The trade-off is administrative overhead. The plan requires annual actuarial valuations, a yearly Form 5500 filing with the Department of Labor, and consistent funding.11U.S. Department of Labor. Form 5500 Series Skipping a year or underfunding triggers penalties and possible plan disqualification.
Owners between ages 60 and 63 get an extra boost in 2026 through a new super catch-up provision: $11,250 in additional 401(k) deferrals on top of the standard limit, bringing total 401(k) contributions to $35,750.10Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026 Some owners layer a defined benefit plan on top of a 401(k) to maximize total tax-deferred savings. The combination works best for businesses with few employees, because the plan must cover eligible staff as well.
Section 754 Basis Adjustments for Partnerships
When someone buys into a partnership at a price reflecting the current fair market value of the business, they face a mismatch. The partnership’s books still carry the assets at their original tax cost, which may be far lower. Without an adjustment, the new partner eventually gets taxed on gains that accrued before they joined. Section 754 lets the partnership elect to step up (or step down) the tax basis of its assets to match what the incoming partner paid.12Internal Revenue Service. FAQs for Internal Revenue Code (IRC) Sec. 754 Election and Revocation The adjustment applies only to that partner, not the entire entity.
The same election applies when the partnership distributes property to a partner. Without it, the distribution can trigger phantom gains or leave partners with an incorrect basis in the assets they receive. Real estate partnerships and businesses with appreciated intellectual property benefit the most, because the step-up generates additional depreciation or amortization deductions that reduce taxable income for years.
To make the election, the partnership attaches a written statement to its timely filed return (including extensions) for the year in which the transfer or distribution occurs, identifying the partnership and declaring the election under Section 754.12Internal Revenue Service. FAQs for Internal Revenue Code (IRC) Sec. 754 Election and Revocation Miss the deadline and an automatic 12-month extension is available under Treasury Regulation Section 301.9100-2. Once made, the election stays active for every future transfer and distribution, which is where partnerships sometimes get caught: a later transaction can produce a downward basis adjustment that hurts the partnership under the same election that once helped it.
State Pass-Through Entity Tax Elections
The federal cap on state and local tax deductions was raised from $10,000 to $40,000 under the One Big Beautiful Bill Act, with the cap increasing 1% annually through 2029. For higher earners, the cap phases down at a 30% rate once income exceeds roughly $505,000 for 2026, eventually returning to $10,000 at the top of the phase-out range. The PTE election, once essential for almost every LLC owner in a high-tax state under the old $10,000 cap, now has a narrower but still meaningful audience.
The strategy works by having the LLC or partnership pay state income taxes at the entity level rather than leaving each owner to deduct the taxes individually. Because the entity pays the tax as a business expense, the payment is fully deductible against federal income, bypassing the individual SALT cap. Owners then take a credit on their personal state returns to prevent double taxation. For a partnership with four members each paying $30,000 in state income tax, electing PTE treatment converts $120,000 from a partially capped individual deduction into a fully deductible business expense.
The election matters most for owners whose income pushes them into the phase-down range above $505,000, where the individual SALT cap shrinks back toward $10,000. For those earners, the PTE election restores the full deduction that the phase-down would otherwise claw back. The filing process varies by state but usually requires a formal election with the state revenue department before a set deadline, often as early as March 15 or by the original return due date, with timely estimated payments to avoid state penalties.
Loss Limitation Rules to Watch
Before you can deduct any loss from your LLC or partnership on your personal return, it has to clear three separate gates in order. These rules trip up more owners than any single strategy saves them.
The first gate is basis. Your deductible share of partnership losses cannot exceed your adjusted basis in the partnership interest. Basis starts with your initial investment, increases with your share of profits and additional contributions, and decreases with distributions and prior losses.13Office of the Law Revision Counsel. 26 U.S. Code 704 – Partner’s Distributive Share If the partnership allocates you $80,000 in losses but your basis is $50,000, you deduct $50,000 now and carry the remaining $30,000 forward.
Second is the at-risk limitation. You can only deduct losses up to the amount you have economically at risk in the activity, which generally means money contributed plus debt for which you are personally liable.14Office of the Law Revision Counsel. 26 U.S. Code 465 – Deductions Limited to Amount at Risk Nonrecourse debt generally does not count, with a major exception for qualified nonrecourse financing on real estate.
Third is the passive activity limitation. Losses from a business in which you do not materially participate cannot offset your active income like wages or income from businesses where you are hands-on. They can only offset income from other passive activities.15Office of the Law Revision Counsel. 26 U.S. Code 469 – Passive Activity Losses and Credits Limited The IRS uses seven tests to determine material participation and you need to satisfy one; the two most common are logging more than 500 hours in the activity during the year, or having participated for any five of the preceding ten tax years.16Internal Revenue Service. Publication 925, Passive Activity and At-Risk Rules
Related to these rules is how self-employment tax hits partnership income. General partners owe self-employment tax on their entire distributive share plus any guaranteed payments for services. Limited partners are exempt from self-employment tax on their distributive share; only their guaranteed payments are subject to it.17Office of the Law Revision Counsel. 26 U.S. Code 1402 – Definitions That distinction gives multi-member entities a real lever in how they structure roles and payments.
Don’t Miss the Filing Deadlines
Every strategy above depends on filing the right forms on time. Partnership returns (Form 1065) and S corporation returns (Form 1120-S) are both due March 15 for calendar-year entities. Miss that date and the penalty runs monthly for each partner or shareholder, up to 12 months. For partnership returns due after December 31, 2024, the base penalty is $245 per partner per month, adjusted annually for inflation.18Internal Revenue Service. Information About Your Notice, Penalty and Interest A 10-partner LLC that files six months late faces over $14,000 in penalties before any tax is owed.
S corporations face a parallel penalty structure under a separate code section, calculated per shareholder per month, with the same 12-month maximum. The IRS runs a first-time penalty abatement program for entities with a clean filing history over the prior three years. Extensions are available through September 15 by filing Form 7004, which buys time to file the return but does not extend the deadline for paying estimated taxes. Getting the extension in before March 15 is the single easiest way to keep a planning year from being erased by a preventable penalty.