Summary of What This Blog Covers
- How to report stock sales accurately and avoid overpaying taxes
- When charitable giving can offset capital gains
- Why tax software may misreport RSUs and ESPPs
- When working with a CPA adds long-term value
Let’s paint a picture. You’ve been earning equity compensation for years: RSUs, ESPPs, maybe even ISOs. You’ve held through the IPO. You’ve read the plan documents (somewhat). And now, you’ve sold shares and are staring at your 1099-B, trying to figure out what happens next.
Here comes tax season, bringing with it a mix of pride (hey, gains!) and panic (wait, do I owe taxes on all of this?).
Sound familiar?
You’re not alone. At Insogna, a leading team of licensed CPAs in Austin, Texas, we work with professionals from all industries (tech, finance, medicine, consulting) who’ve built up stock compensation and want to make sure they’re handling it right.
So whether you just sold your first few shares or you’re managing multiple years of grants and sales, here are the five questions you absolutely need to ask before you file your taxes on stock sales.
This isn’t just a checklist. It’s your invitation to take control of your equity strategy and make tax filing feel less like a landmine and more like a launchpad.
1. Do I Have an Accurate Cost Basis for All My Stock Grants?
Let’s start with the most fundamental and most often misunderstood concept in stock compensation: your cost basis.
The cost basis is the original value of your stock for tax purposes. It’s what you “paid” for the shares, including:
- The purchase price (for ESPPs and stock options)
- The fair market value (FMV) on the vesting date (for RSUs)
- Income already reported on your W-2
Your capital gain or loss is calculated by subtracting this cost basis from your sales price. Simple enough, right?
Not so fast.
Here’s what goes wrong:
Most brokers don’t adjust the cost basis on your 1099-B. For example:
- RSUs often show a cost basis of $0, even though you paid tax at vesting
- ESPP shares may not include the discount amount that was taxed as compensation income
- ISO sales may not reflect alternative minimum tax (AMT) adjustments
And when cost basis is reported too low, the IRS thinks your gain is bigger than it actually is. Translation? You overpay taxes.
We’ve seen clients pay thousands more than they needed to, simply because their cost basis wasn’t updated correctly.
What we do at Insogna:
- Cross-check your 1099-B with your W-2
- Review plan documents, purchase records, and vesting dates
- Adjust basis manually so your return reflects what you actually owe
If you’ve ever asked, “Why is my capital gain so high when I already paid tax on this stock?”, this is why.
2. Can Charitable Giving Offset Some of My Capital Gains?
This is where taxes get kind of magical. Tes, we said it.
Let’s say you sold company stock at a sizable gain. You’re looking at a higher tax bill than expected. But you also planned to make a charitable donation this year. Here’s how you can combine those two things into one savvy, high-impact move.
How it works:
- Donate appreciated stock to a qualified charity
- Receive a deduction for the fair market value of the stock
- Avoid capital gains tax on the appreciation
This strategy is ideal for:
- RSU or ESPP shares that have appreciated significantly
- Long-term holdings with built-in gains
- Year-end giving plans paired with year-end tax planning
Let’s say you have stock worth $15,000 that you bought for $5,000. If you donate the shares:
- You avoid paying tax on the $10,000 gain
- You claim a $15,000 charitable deduction if you itemize
- The charity receives the full $15,000 value, without selling or paying tax
What we do at Insogna:
- Identify the best lots to donate (FIFO vs. specific identification)
- Help you coordinate with your financial advisor or DAF provider
- File Form 8283 properly so the IRS sees what you did and why
3. Do I Need to Amend a Prior Return for Basis Errors?
This one’s important and more common than you’d think.
If you’ve been filing stock sales for a few years, especially with RSUs or ESPPs, there’s a real chance something got misreported. And if you overpaid or underreported gains in previous years, it might be time to file an amended return.
Reasons to consider amending:
- You paid capital gains tax on income already taxed via W-2 (hello, RSUs)
- You didn’t report the purchase discount properly for ESPPs
- You incorrectly treated a disqualifying ISO sale
- You forgot to adjust your cost basis and the IRS thinks you had more gain than you really did
But wait, is amending worth it?
Sometimes, yes. Amending your return can:
- Trigger a refund
- Prevent penalties if the IRS finds the issue later
- Help correct your tax records before a larger audit happens
At Insogna, our licensed CPAs and enrolled agents will go through your past returns, Form 1099s, and payroll records to help you decide whether it’s worth amending—and if so, we’ll handle the paperwork.
4. Is My Tax Software Handling RSUs and ESPPs Correctly?
Let’s talk about tax software. It’s convenient. It’s fast. But when it comes to stock compensation? It often misses critical details.
Why?
Because tax software assumes:
- The numbers in your brokerage 1099-B are correct
- You know how to manually adjust cost basis for RSUs or ESPPs
- You understand the implications of disqualifying dispositions
The reality:
Most taxpayers and even many tax preparers miss these adjustments. And if you just accept the software defaults, you might:
- Overreport income (hello, double taxation)
- Underreport gain (hello, IRS notice)
- Misclassify stock sales, causing red flags
Tax software isn’t wrong. It’s just incomplete.
At Insogna, we do what software can’t: we ask questions, review source documents, and help you understand what happened and how to report it properly. Because your stock compensation is a tax story, not just a form.
5. Would Working with a CPA Deliver Long-Term Value?
This is the question that ties everything together.
Sure, you can figure out equity comp reporting on your own. But the real value of working with a certified public accountant near you isn’t just about filing accurately. It’s about making strategic, future-focused decisions.
At Insogna, we help clients:
- Plan stock sales based on income, tax brackets, and timing
- Avoid AMT surprises with ISOs
- Structure charitable giving and gifting
- Prepare for IPOs and liquidity events
- Understand how equity fits into their larger financial life
Whether you’re a first-time equity recipient or a seasoned executive managing a full portfolio of company stock, a long-term partnership with a knowledgeable CPA gives you peace of mind and better outcomes.
Bonus Question: What If I Hold Stock in a Foreign Account?
If you have company shares or proceeds in a foreign brokerage or international investment platform, you may have FBAR filing obligations.
FBAR is required if:
- Your total balance across foreign accounts exceeded $10,000 at any point during the year
- You had signature authority or financial interest in a foreign account
Failing to file can result in penalties even if no taxes are due.
We help clients:
- Evaluate whether FBAR filing applies
- File Form FinCEN 114
- Stay compliant with global tax rules
If you’ve been Googling “tax accountant near me” or “CPA near me” to help with foreign reporting, you found the right team.
Final Thoughts: Stock Gains Deserve Strategy
Equity isn’t just a nice-to-have benefit. It’s a real opportunity to build wealth. But the tax side of stock sales is where many people get stuck (or overpay) because they don’t know the questions to ask.
You deserve more than trial and error. You deserve a partner who understands this world and can help you navigate it with confidence.
At Insogna, we help equity-compensated professionals:
- Understand cost basis
- Avoid double taxation
- Maximize charitable impact
- Fix past mistakes
- Plan future sales
Ready for Clarity?
If these questions matter to you, connect for a complimentary strategy conversation. Insogna can help. We turn complexity into confidence and confusion into strategy.
Let’s turn your equity into something more than just a line on a statement. Let’s turn it into a plan.