Tax planning isn't sexy, but it's the difference between walking away with $3.8M or $3.2M from the same $5M sale. Most agency owners leave $100K-$300K+ on the table through poor tax planning or ignorance of timing strategies.
This guide covers the major tax implications of selling, common mistakes, and strategies to minimize your overall tax burden. This is not tax advice—it's informational. Work with a CPA and transaction tax specialist on your specific situation.
How long you've owned the agency dramatically affects your tax rate.
If you've held your agency for more than one year at the time of sale, gains are taxed as long-term capital gains. As the SBA's business exit resources advise, tax planning should begin 12-24 months before a sale -- with the structure of the deal (asset vs. stock, installment vs. lump sum) often determining more of your net proceeds than the headline price.
Federal rates:
For most agency owners selling at higher valuations, you're in the 15-20% federal bracket for long-term gains.
If you've held less than one year, gains are ordinary income.
Federal rates: 22%, 24%, 32%, 35%, or 37% depending on income bracket.
This is significantly higher. On a $5M sale with $4.8M gain, the difference between 15% and 35% federal tax is $960K. That's real money.
If you're thinking about selling and you're 11 months into ownership, waiting one month could save you $100K+. The IRS counts holding period from the date you acquired the business. If you bought on March 15, 2025, long-term treatment kicks in on March 16, 2026.
Critical timing issue: If you inherited a business or received it as a gift, the holding period may be different. Work with your CPA to confirm the holding period used for tax purposes. Some beneficiary situations allow for stepped-up basis (full value reset at death), which changes the calculation entirely.
Don't forget state taxes. They're not insignificant.
Most states don't have separate capital gains taxes. But California, New York, and a few others do:
Example: Sell a California agency for $5M with $4.8M gain. Federal long-term capital gains (15%) = $720K. California state tax (13.3%) = $638K. Total = $1.358M in federal + state capital gains tax. That's 27.3% blended.
Depending on deal structure, some proceeds may be treated as ordinary income (not capital gains). These are taxed at your full state income tax rate, which can be 5-13%.
This is a 3.8% surtax most people don't know about until they're hit with it.
If your modified adjusted gross income exceeds:
You pay an additional 3.8% tax on the lesser of:
On a $5M sale: assume $4.8M capital gain. If you're single with MAGI exceeding $200K, you owe 3.8% NIIT on the gain (or the amount above $200K, whichever is less).
$4.8M x 3.8% = $182,400 additional tax.
If you're married with MAGI exceeding $250K, it's similar. This adds real cost to your exit.
NIIT planning: If you're anticipating a large capital gain and you're near the MAGI threshold, consider strategies like maximizing 401(k) contributions in the year before sale (lowers MAGI) or spreading proceeds over multiple years via installment sale. A transaction tax specialist can model scenarios.
How your agency is structured matters for taxes.
Most agency owners use S-corps because they're tax-efficient during operations. On sale, an S-corp is generally treated as a stock sale with capital gains treatment. The gains pass through to you as the owner at long-term capital gains rates (if held >1 year).
Example: S-corp sale for $5M, gain of $4.8M. Capital gains tax at 15% federal + 5% state = ~20%, leaving you $3.84M net. Clean.
C-corps create double taxation on sale. The corporation pays tax on its gains (21% federal corporate rate), then you pay tax again on the distribution of after-tax proceeds (capital gains on top of that).
Example: C-corp sale for $5M, gain of $4.8M at corporation level. Corp pays 21% = $1.008M. Remaining: $3.992M to distribute to you. You then pay capital gains tax on that distribution (and on the original gain). Blended rate can be 30-35%+.
If you're currently a C-corp, you can elect S-corp status (Form 2553) before selling. But there's a catch: if you made the election less than 5 years ago, the built-in gains tax applies.
The built-in gains tax requires you to pay the old C-corp tax rate (21%) on the gain attributable to the period when you were a C-corp. Only gains accrued after S-election avoid this.
If you're a C-corp now and thinking of selling in 3 years, a CPA should model whether S-election makes sense or if you should wait longer.
Not all proceeds have to hit your bank account in year one of the sale.
If the buyer gives you a promissory note (e.g., $2.5M at close, $2.5M over 2 years), you report the gain proportionally as you receive proceeds.
Example: $5M sale with $4.8M gain. If you receive $2.5M at close and $2.5M in year 2:
Year 1: Gain recognized = ($2.5M / $5M) x $4.8M = $2.4M gain. Federal tax at 15% = $360K.
Year 2: Gain recognized = $2.4M. Federal tax at 15% = $360K.
versus all cash at close:
Year 1: Gain = $4.8M. Federal tax at 15% = $720K. You pay all tax immediately and lose the time-value of money benefit of paying half in year 2.
Spreading proceeds can also help with tax brackets and NIIT thresholds. If you have significant income in 2026 from the sale, spreading into 2027 might push you out of the 20% LTCG bracket and keep you closer to the 15% bracket, saving additional percentage points.
This strategy is negotiated as part of deal structure. Some buyers pay all cash and won't do installments. Others are fine with it. It's worth discussing.
If your agency is an LLC taxed as a partnership, gains flow through to you on a K-1. Long-term capital gains treatment applies if you've held >1 year. The mechanics are similar to an S-corp, but with some nuances:
Most agencies are either S-corps or partnerships (LLCs taxed as partnerships). Both are more tax-efficient than C-corps.
This is an advanced strategy available until December 31, 2026.
If you reinvest at least 90% of your capital gain (within 180 days of the sale) into a Qualified Opportunity Zone investment (specific funds and businesses in designated low-income areas), you can:
Example: $5M sale, $4.8M gain. Reinvest $4.32M (90%) in a QOZ fund. You defer tax on $4.32M until 2026. You recognize tax on the remaining 10% ($480K gain) in the year of sale.
This is complex and requires careful planning. Not all advisors understand it. If you're considering this, work with a transaction tax specialist.
If you've held the business >1 year, make sure your tax return correctly claims LTCG treatment. Some sellers accidentally file as short-term. It's an easy fix with an amendment, but prevents the error from day one.
If you're 11 months into ownership and ready to sell, wait one more month. The tax savings are massive. Conversely, if you've held <1 year and there's flexibility, sometimes waiting unlocks better tax treatment.
Many successful agency owners fall into NIIT thresholds without knowing it. Model your MAGI before the sale closes. If you're going to exceed thresholds, explore strategies like installment sales or maxing out pre-tax contributions to reduce MAGI.
Asset sales can result in ordinary income treatment on some assets, costing 10-15% more in taxes. Always model both stock and asset sale outcomes with your CPA. If the difference is $100K+, negotiate the structure or price adjustment accordingly.
Some sellers think "federal capital gains tax" and ignore state. In high-tax states like California, state taxes can be as large as federal. Understand your state's treatment. If you're relocating post-sale (moving from CA to FL to avoid state tax), make sure the timing and mechanics are correct. IRS can challenge status changes.
General CPAs handle compliance. Transaction CPAs specialize in minimizing taxes on acquisitions. They cost extra ($3K-$10K) but save $50K-$300K+ through modeling and strategy. It's always worth it.
12 months before sale: Work with a CPA to model entity structure, holding period, and state tax implications. Make any elective changes (S-corp election, basis optimization, NIIT planning).
6 months before sale: Finalize structures and file any required elections. Prepare tax documentation for buyers' due diligence.
At LOI: Share tax assumptions with buyer's counsel. Discuss earnout structure and how it affects tax. Negotiate structure (stock vs. asset) with full understanding of tax consequences.
At close: Work with your tax team to properly document the transaction. File election for installment sale treatment if applicable.
Post-close: File tax return showing the transaction correctly. Claim all eligible deductions and adjustments. Consider amended returns if you discover opportunities (most have 3-year window).
Your exit needs:
These roles overlap somewhat, but each brings specific expertise. Budget $25K-$50K for professional fees. You'll make it back in tax savings alone.
This article is informational and educational. Tax law is complex and varies by individual situation, entity type, state, and federal status. Nothing here constitutes tax advice. Always consult with a qualified CPA or tax attorney before making decisions that affect your tax liability. Every situation is unique, and professional guidance is essential.
We acquire marketing agencies outright—full purchase, no minority stakes, no earn-ins. You close with real proceeds, stay on to run the business, and can roll equity into the platform we're building toward a $50M+ PE exit.
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