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Understanding Capital Gains Tax in Startup Exits: A Founder’s Guide

Written by Bryce Allen
EntrepreneurshipGrowth HubTaxation

When planning for a startup exit, one of the most significant financial considerations for founders is capital gains tax.

This tax, which applies to the profit realized from the sale of capital assets such as stock or equity, can have a profound impact on the overall profitability of an exit. For many founders, the potential tax liability can come as a surprise, affecting how much of the sale proceeds they actually take home. Understanding capital gains tax—and the strategies to manage it effectively—becomes critical for preserving the value of years of hard work and investment.

Capital gains taxes are especially important in the world of startups, where equity is often the primary asset. Whether you’re selling shares or the entire company, being aware of how these taxes work can help you structure your exit in a way that minimizes liabilities and maximizes returns. Without proper planning, founders risk seeing a significant portion of their gains absorbed by taxes, undermining their long-term financial goals.

In this guide, we’ll cover the fundamentals of capital gains tax as it relates to startup exits, explore key exemptions such as the Qualified Small Business Stock (QSBS) exemption, and discuss strategies for minimizing your tax burden. We’ll also provide practical tips on preparing for the tax implications of your exit to ensure you’re in the best possible financial position. By planning ahead and understanding the tax landscape, you can make your exit not only successful but also financially rewarding.

What Are Capital Gains and How Are They Taxed?

Capital gains refer to the profit made from the sale of an asset, such as shares of stock or business equity, when the selling price exceeds the original purchase price. For startup founders, capital gains often come into play during an exit when they sell equity in the business. The IRS categorizes these gains into two types—short-term and long-term—depending on how long the asset was held before it was sold.

Short-Term vs. Long-Term Capital Gains

  • Short-Term Capital Gains: If an asset is held for one year or less before being sold, the profit is considered a short-term capital gain. These gains are taxed at ordinary income tax rates, which can be significantly higher depending on your tax bracket. For many founders, this rate could be as high as 37%, making short-term capital gains a costly option.
  • Long-Term Capital Gains: If an asset is held for more than one year, it qualifies for long-term capital gains tax rates. These rates are generally lower, offering significant savings for those who can wait. As of 2024, long-term capital gains tax rates range from 0% to 20%, depending on income level, with most founders falling into the 15-20% range.

How Capital Gains Taxes Are Calculated

Capital gains tax is calculated based on the difference between the selling price of the asset and its original purchase price (known as the cost basis). For example, if a founder sells shares of their company for $1 million, but the original purchase price (cost basis) of those shares was $200,000, the capital gain is $800,000. Depending on whether these gains are classified as short-term or long-term, different tax rates will apply to this amount.

Thresholds for Different Tax Rates

The IRS uses a tiered system for long-term capital gains taxes, with different rates applied depending on your total taxable income. As of 2024:

  • 0% rate: Applies if your income is below $44,625 for single filers or $89,250 for married couples filing jointly.
  • 15% rate: Applies for income between $44,626 and $492,300 for single filers or $89,251 to $553,850 for married couples.
  • 20% rate: Applies to income exceeding these thresholds.

Tax Treatment of Stock Sales and Asset Sales

In startup exits, capital gains taxes typically arise in two key scenarios: stock sales and asset sales.

  • Stock Sales: When founders sell shares in their company, the profit is subject to capital gains tax. If the stock has been held for more than a year, it qualifies for long-term capital gains rates, which are typically more favorable.
  • Asset Sales: In an asset sale, the business sells its individual assets—such as intellectual property, equipment, or customer lists—rather than selling stock in the company. In this case, the gains from the sale of those assets are still subject to capital gains tax, but the tax treatment can be more complex depending on the asset type. Some assets may be taxed at ordinary income rates, while others qualify for capital gains treatment.

Understanding how capital gains are taxed is essential for founders looking to maximize their profit in a startup exit. Proper planning, particularly around holding periods and the type of sale, can make a significant difference in the overall tax liability and net outcome.

Qualified Small Business Stock (QSBS) Exemptions

For startup founders, the Qualified Small Business Stock (QSBS) exemption can be a game changer when it comes to reducing or even eliminating capital gains tax liability during an exit. The QSBS exemption, under Section 1202 of the Internal Revenue Code, allows founders to exclude up to 100% of the capital gains from the sale of stock in certain qualifying small businesses. This exemption can provide significant tax savings, making it a key consideration for founders as they plan their exit strategies.

What Is QSBS?

Qualified Small Business Stock refers to shares of stock issued by a domestic C-corporation that meets specific criteria outlined by the IRS. If a founder’s stock qualifies as QSBS, they may be able to exclude up to $10 million or 10 times their original investment in the stock from capital gains taxes, whichever is greater. This exclusion can apply to long-term capital gains, meaning if the stock is held for more than five years, the gains from its sale may not be taxed at all.

Criteria for QSBS Eligibility

Not every startup qualifies for the QSBS exemption. To benefit from this tax advantage, both the company and the stock itself must meet certain criteria:

  1. Qualified Small Business: The company issuing the stock must be a C-corporation, and at the time the stock is issued, the company’s gross assets must not exceed $50 million. Additionally, the company must remain a C-corporation for the duration of the founder’s stock ownership to maintain eligibility.
  2. Active Business Requirement: At least 80% of the company’s assets must be used to conduct qualified business activities. Certain businesses, such as those in the fields of professional services, financial services, and hospitality, do not qualify. However, most tech startups, including those in software, hardware, and biotech, do meet the active business requirement.
  3. Original Issuance: The stock must be acquired directly from the company at its original issuance, either through a purchase or as compensation for services. Stock bought from another investor or through secondary markets typically doesn’t qualify.
  4. Five-Year Holding Period: To take full advantage of the QSBS exemption, founders must hold their shares for at least five years. If they sell the stock before reaching this threshold, they will not be eligible for the full exclusion, although a partial exclusion may still apply under certain circumstances.

Taking Advantage of the QSBS Exemption

For founders planning an exit, understanding and leveraging the QSBS exemption can dramatically reduce the tax burden associated with selling their stock. Here’s how you can make the most of this benefit:

  1. Plan Ahead: The five-year holding period is crucial. If you’re thinking of exiting, consider your timeline and whether waiting to meet the QSBS eligibility criteria could provide significant tax savings.
  2. Consult with a Tax Advisor: Since QSBS rules can be complex and subject to interpretation, it’s essential to work closely with a tax advisor to ensure your stock qualifies. They can help you navigate the specific requirements and advise on how to structure the sale to maximize your exemption.
  3. Partial Exclusions for Early Sales: In cases where founders sell their stock before reaching the five-year holding period, they may still be able to defer capital gains taxes by reinvesting in another qualified small business under the rollover provisions of Section 1045. This strategy can offer a way to manage capital gains taxes while maintaining flexibility.

The Impact of QSBS on Your Exit Strategy

For many founders, the QSBS exemption represents a significant financial opportunity, potentially saving millions in capital gains taxes. By taking proactive steps to ensure your stock qualifies and planning your exit strategy around the five-year holding period, you can substantially improve the financial outcome of your exit.

At Rooled, we help founders navigate complex tax considerations like QSBS, ensuring they maximize the value of their hard-earned exits. Whether you’re preparing to sell your company or planning for the future, understanding the potential benefits of the QSBS exemption is crucial to reducing your tax liabilities and enhancing your financial success.

Strategies to Minimize Capital Gains Taxes in Startup Exits

Minimizing capital gains taxes during a startup exit is a critical aspect of ensuring that founders maximize the financial return from their years of hard work. Fortunately, there are several actionable strategies that founders can use to reduce their capital gains tax liability, allowing them to keep more of the proceeds from their exit. Each strategy requires careful planning and, in most cases, guidance from tax professionals to tailor it to the unique circumstances of the startup.

Here are some key strategies that can help founders minimize capital gains taxes:

1. Hold Onto Stock for Long-Term Capital Gains Rates

One of the simplest and most effective ways to reduce capital gains taxes is to hold onto your stock for at least one year. By doing so, founders can benefit from long-term capital gains tax rates, which are significantly lower than short-term rates. As mentioned earlier, short-term capital gains (for assets held less than one year) are taxed at ordinary income rates, which can reach up to 37%. In contrast, long-term capital gains are taxed at rates of 0%, 15%, or 20%, depending on your income level.

For founders planning an exit, the timing of the sale can make a substantial difference in tax liability. If you’re approaching the one-year mark, it may be worth waiting to cross into long-term capital gains territory to take advantage of the lower tax rates.

2. Leverage the QSBS Exemption

As discussed in the previous section, the Qualified Small Business Stock (QSBS) exemption is one of the most powerful tools available to startup founders for reducing or eliminating capital gains taxes. By ensuring that your stock qualifies for QSBS and holding it for the required five-year period, you could exclude up to $10 million (or 10 times the original investment) in gains from taxation.

Founders should consult with their tax advisor early on to confirm their eligibility for QSBS and explore ways to maximize the potential exemption. Structuring your exit to take full advantage of QSBS can result in significant tax savings.

3. Consider a Section 1045 Rollover

For founders who wish to sell their stock before the five-year holding period required for QSBS, a Section 1045 rollover can offer a valuable tax deferral option. Under this provision, founders can reinvest the proceeds from the sale of their QSBS into another qualified small business within 60 days of the sale. By doing so, they can defer the recognition of capital gains until the new stock is sold.

This strategy can provide flexibility for founders who want to exit but still wish to defer capital gains tax while investing in other promising startups. It’s important to work closely with a tax advisor to ensure that the transaction qualifies for Section 1045 and to navigate any complexities in the process.

4. Utilize Charitable Donations of Stock

Donating stock to a charitable organization can be a tax-efficient way to minimize capital gains taxes while supporting causes you care about. When you donate appreciated stock directly to a nonprofit, you can typically avoid paying capital gains tax on the appreciation while also receiving a charitable deduction for the full market value of the stock.

This strategy is particularly useful for founders who are already planning to make charitable contributions and want to reduce their tax burden while doing so. Be sure to consult with a tax professional to ensure you meet the requirements for charitable deductions and understand how this fits into your overall tax strategy.

5. Invest in Opportunity Zones

Opportunity Zones provide a tax incentive for investors to reinvest capital gains into designated economically distressed areas. By investing proceeds from a startup exit into a Qualified Opportunity Fund (QOF), founders can defer capital gains taxes on the original sale and potentially reduce or eliminate taxes on the appreciation of the new investment if it is held for at least 10 years.

This strategy can be particularly attractive for founders looking to diversify their investments while deferring capital gains tax. However, it requires a long-term commitment, so it’s important to weigh the benefits against the liquidity needs of the founder.

6. Maximize Available Deductions

In addition to the strategies mentioned above, founders should work with their tax advisor to explore other available deductions that can reduce taxable income and minimize capital gains taxes. For example, deductions for business expenses, investment losses, and contributions to retirement accounts can all help lower your overall tax liability.

Understanding which deductions are applicable to your specific situation and leveraging them in the most tax-efficient way requires expert guidance, but the potential savings are often well worth the effort.

7. Consult with Tax Professionals

While these strategies can significantly reduce capital gains tax liability, it’s essential for founders to consult with tax professionals to tailor a plan that aligns with their specific circumstances. Every startup is different, and the best approach will depend on factors such as the type of exit, the founder’s personal financial situation, and the timing of the sale. Engaging with a tax advisor early in the process can help founders develop a comprehensive strategy that minimizes taxes and maximizes the financial outcome.

At Rooled, we specialize in helping founders navigate the complex tax implications of a startup exit. From evaluating QSBS eligibility to planning the timing of stock sales, we provide the expert guidance you need to ensure a successful and financially rewarding exit.

Preparing for Capital Gains Tax During an Exit

One of the most effective ways for startup founders to manage capital gains tax obligations during an exit is through early and proactive tax planning. By anticipating the tax implications of a sale and preparing well in advance, founders can avoid unexpected liabilities and ensure that they are positioned to maximize the financial benefits of their exit. Early preparation also allows founders to explore strategies for reducing or deferring capital gains taxes, as discussed in previous sections.

Here are key steps founders can take to prepare for capital gains taxes during a startup exit:

1. Maintain Thorough Records of Stock Ownership

Keeping accurate and comprehensive records of stock ownership is crucial for calculating capital gains taxes correctly. Founders should have a clear record of:

  • The date they acquired their shares.
  • The original purchase price or cost basis of the stock.
  • Any stock splits, dividends, or other transactions that could affect the cost basis.
  • The date and value of any stock sales or transfers.

Having this information readily available ensures that you can accurately calculate your capital gains, distinguishing between short-term and long-term gains. It also helps when determining eligibility for key tax benefits such as the QSBS exemption or long-term capital gains rates.

2. Track Holding Periods

The length of time you hold your stock before selling it has a direct impact on the capital gains tax rates you’ll face. As mentioned earlier, selling stock held for less than one year results in short-term capital gains, which are taxed at higher ordinary income rates. Conversely, holding stock for more than one year qualifies the sale for more favorable long-term capital gains rates.

In addition to holding stock for more than a year, founders should also track the five-year holding period required to take full advantage of the QSBS exemption. If your shares qualify as QSBS, this holding period can allow you to exclude a significant portion (or even all) of the capital gains from taxation.

To avoid surprises during an exit, founders should work closely with their tax advisors to track the exact holding periods of their shares. This allows for strategic decision-making about when to sell shares in order to benefit from reduced tax rates.

3. Engage with Tax Advisors Early

Perhaps the most important step in preparing for capital gains tax is engaging with tax advisors well in advance of your exit. Tax advisors can provide valuable insights into the specific tax obligations you’ll face and help you plan accordingly. They can also identify opportunities to reduce or defer capital gains taxes, such as:

  • Structuring the sale in a tax-efficient manner.
  • Timing the sale to take advantage of long-term capital gains rates.
  • Identifying applicable exemptions like QSBS or Section 1045 rollovers.
  • Recommending charitable donations or reinvestment in Opportunity Zones.

By involving tax advisors early in the exit planning process, founders can take full advantage of these strategies while ensuring compliance with tax regulations. This approach also provides the time needed to address any unexpected issues, such as correcting records, adjusting the timing of the sale, or meeting eligibility criteria for key tax benefits.

4. Consider Timing for Multiple Tax Years

Founders should also consider the impact of spreading their capital gains over multiple tax years. In some cases, it may be beneficial to structure the sale as an installment sale, where the proceeds are received over several years rather than all at once. This strategy can help manage taxable income by avoiding the spike in income (and taxes) that can occur when large gains are realized in a single year.

Spreading the gains over multiple years may help you stay within lower tax brackets, thus minimizing the overall capital gains tax rate. Your tax advisor can help evaluate whether this approach makes sense for your specific situation.

5. Prepare for Additional Tax Liabilities

In addition to federal capital gains taxes, founders should be aware of potential state and local tax liabilities. Some states impose their own capital gains taxes, which can significantly increase your overall tax burden. It’s important to understand the tax rules in your state and to plan accordingly. In some cases, relocating before an exit may provide tax savings, but this decision should be carefully considered with input from a tax advisor.

6. Evaluate the Impact of Other Exit-Related Taxes

In some startup exits, additional taxes may come into play, such as the Net Investment Income Tax (NIIT), which applies a 3.8% tax on certain investment income, including capital gains, for high-income individuals. Understanding these additional taxes and preparing for them ahead of time can help founders avoid surprises and plan for their total tax obligations.

Capital gains tax plays a critical role in determining the financial outcome of a startup exit. For many founders, failing to plan ahead for these taxes can result in significant tax liabilities, potentially diminishing the overall profitability of their exit. By understanding the fundamentals of capital gains tax, familiarizing yourself with exemptions like QSBS, and proactively seeking professional tax advice, you can position yourself to minimize your tax burden and preserve more of the wealth you’ve worked so hard to build.

Early planning is key to navigating the complexities of capital gains tax, and every founder’s situation is unique. Whether it’s leveraging long-term capital gains rates, reinvesting proceeds through a Section 1045 rollover, or exploring other strategies like charitable donations, there are numerous ways to reduce tax liabilities with the right preparation.

At Rooled, we understand the complexities involved in capital gains tax planning and exit strategies. Our team is dedicated to helping startup founders maximize their financial outcomes by providing expert guidance throughout the entire process. From early tax planning to structuring your exit in a tax-efficient manner, Rooled is here to support you every step of the way. By taking action early and seeking professional advice, you can ensure a more rewarding and financially sound exit.

About the Author

Bryce Allen

Bryce Allen is the Director of Tax at Rooled, Inc., in his 16th year of public accounting firm experience. He earned his Bachelor of Science in Accounting at San Jose State University. R&D tax credit guidance is a key area of Bryce's expertise.