The Top 3 Reasons You Are Overpaying Your Crypto Taxes
By Garrett Taylor, CPA
April 29, 2026 · 12 min read
Key Takeaways
- ✓FIFO is the IRS default — it almost always maximizes your tax bill. Specific Identification can legally reduce your gain to zero on the same sale.
- ✓The new 1099-DA reports proceeds but not cost basis for most legacy holdings. If you leave basis blank, the IRS can tax 100% of proceeds.
- ✓Unrealized losses are not tax assets until you sell. Tax-loss harvesting turns down markets into real deductions — but only if your data is clean.
Most crypto investors do not have a tax problem. They have a data problem. Wallets, exchanges, transfers, swaps, NFTs, DeFi positions — when the underlying ledger is messy, the IRS math gets messy, and that almost always falls on the side of you paying more than you actually owe.
This guide collapses three of the most expensive mistakes we see at COS Elite and shows exactly how to stop making them in 2026 — the year the 1099-DA, new cost-basis rules, and broker reporting all hit at once.
Key Takeaways
- ✓FIFO is the IRS default — it almost always maximizes your tax bill. Specific Identification can legally reduce your gain to zero on the same sale.
- ✓The new 1099-DA reports proceeds but not cost basis for most legacy holdings. If you leave basis blank, the IRS can tax 100% of proceeds.
- ✓Unrealized losses are not tax assets until you sell. Tax-loss harvesting turns down markets into real deductions — but only if your data is clean.
Reason 1: You Let FIFO Pick Your Lots
When you sell crypto, you do not pay tax on the sale amount. You pay tax on the gain — proceeds minus cost basis. The lot you sell determines the gain, and the gain determines the tax bill.
For sales after Dec 31, 2025, the IRS rule is plain: if you do not specify the units you are selling at the date and time of sale (and keep records), units are treated as sold from the earliest acquired first. That is FIFO by default.
Pro Tip
Long-term accumulators get hit hardest. Your earliest buys are usually your cheapest — so FIFO maximizes your taxable gain on the way out.
$7,600 vs $0
Taxable gain on the same 2 ETH sale — FIFO vs Specific ID (selling 2020 lots at $200 basis vs 2025 lots at $4,000 basis)
How to Qualify for Specific ID in 2026
Specific ID is not a checkbox. It is a documented identification of which units you are selling, set in place no later than the date and time of the sale, using identifiers your broker accepts — backed by adequate records.
Same Sale. Same Proceeds. Two Tax Outcomes.
| Method | Lots Sold | Cost Basis | Taxable Gain | Tax @ 24% |
|---|---|---|---|---|
| FIFO (default) | 2020 lots at $200 | $400 | $7,600 | $1,824 |
| Specific ID | 2025 lots at $4,000 | $8,000 | $0 | $0 |
“Sign a Specific-ID declaration with us before tax season starts. We file it, time-stamp it, and your method is on the record before you place a single trade.”
— Garrett Taylor, CPA
Reason 2: Your 1099-DA Is Missing Your Cost Basis
IRS final regulations under Treasury Decision 10000 phase reporting in over time. Brokers must report gross proceeds for sales on or after January 1, 2025, and basis only for sales of "covered" digital assets on or after January 1, 2026. A digital asset is covered only if it was acquired in that broker's custodial account on or after January 1, 2026 and held there continuously through sale. Everything else is noncovered — and your broker is not required to report basis on it.
$24,000 vs $7,200
Federal tax on $100,000 in proceeds — cost basis blank ($0) vs cost basis correct, at ~24% rate
Pro Tip
Even with the new mandatory basis rule, your broker only reports basis on "covered" assets. Crypto bought before 2026, anything moved between exchanges, and anything held in a self-custody wallet remains noncovered.
Why Your CPA Will Not Catch This
This is not a CPA failure. It is a specialization gap. Traditional CPAs file against the summaries they receive — they do not reconstruct wallet history, trace transfers across chains, or re-derive cost basis for tens of thousands of transactions. The return gets filed, the client gets over-taxed, and nobody realizes it.
Traditional CPA vs COS Elite
| Capability | Traditional CPA | COS Elite |
|---|---|---|
| Transaction history | Files based on summaries | Reconstructs full history |
| Cost basis | Accepts blanks or defaults | Documents per lot |
| Method selection | Defaults to FIFO | Optimizes (HIFO, tax-aware) |
| Loss harvesting | Not evaluated | Identifies harvestable losses |
| Deliverable | Tax return | Audit-ready 8949 + Schedule D |
“In the vast majority of cases, the tax savings we identify exceed the cost of our service. You should only pay tax on what you actually owe.”
— Garrett Taylor, CPA
Not sure if your cost basis is correct?
Book a free 30-minute consultation. We'll review your situation and tell you — directly, in plain English — what your real exposure is.
Talk to GarrettReason 3: You Never Harvested Your Losses
Tax-loss harvesting means selling crypto that is down (at a loss) so the loss becomes a real, usable tax asset. Sophisticated investors do not panic in down markets. They ask one question: what losses can we harvest to reduce taxes?
Three Ways Losses Save You Money
1. Offset gains: Realized losses cancel realized gains, dollar for dollar. The biggest single win.
2. Deduct income: Net excess losses deduct up to $3,000 against ordinary income each year.
3. Carry forward: Unused losses follow you into future years — useful when a big gain finally lands.
$2,250
Tax savings from one disciplined sell decision — harvesting $15,000 in losses against $20,000 in gains at 15% rate
Pro Tip
The wash-sale statute applies to "stock or securities," and the IRS treats virtual currency as property. Under current law, crypto is generally not subject to the stock wash-sale restriction. Rules can change — keep records clean and conservative.
“Tax-loss harvesting only works if your portfolio is reconciled and your basis is correct. Clean data first, smart selling second. Otherwise it is just a guess.”
— Garrett Taylor, CPA
Your 2026 Action Plan
Stop overpaying. Start owning your basis. A 4-step engagement that gets your data clean, your method on the record, and your filings audit-ready before tax season.
1. Book a Call — Free consultation with Garrett. Walk through your wallets, exchanges, and goals.
2. Custom Strategy — We build a personalized plan: lot method, harvesting calendar, entity moves.
3. Execution — COS Elite handles DAR, filings, entities, and IRS communications end-to-end.
4. Ongoing Support — Year-round advisory so you never miss a deadline, an opportunity, or a notice.
Bottom Line
Most overpayments do not happen at filing. They happen six months earlier, in your wallets — when nobody is paying attention to lots, basis, or transfers. The fix is not a better CPA. The fix is a CPA who understands crypto at the ledger level.
That is what COS Elite does. Bring your wallets, exchanges, and questions. We will tell you — directly, in plain English — what your real exposure is, what is fixable, and how much you are likely overpaying right now.
Ready to stop overpaying?
Book a free consultation with Garrett. Former Big Four CPA. License #133092. Garrett answers his phone.
Book a Free ConsultationFrequently Asked Questions
What is Specific Identification and how does it reduce my crypto taxes?
Specific Identification lets you choose which units (lots) of cryptocurrency you are selling. Instead of defaulting to FIFO (First-In, First-Out), which sells your cheapest, oldest coins first and maximizes gains, you can select lots with higher cost basis — potentially reducing your taxable gain to zero on the same sale.
What is the 1099-DA and why is my cost basis missing?
The 1099-DA is a new IRS form that crypto brokers must issue starting in 2025. For 2025 sales, brokers only report gross proceeds. For 2026 sales, they report cost basis only for "covered" assets — those acquired in and continuously held at the same broker since January 1, 2026. Legacy holdings, cross-broker transfers, and self-custody assets remain "noncovered" with blank basis.
Is crypto subject to wash sale rules?
Under current IRS guidance, virtual currency is treated as property, not stock or securities. The wash-sale statute applies to "stock or securities," so crypto is generally not subject to the 30-day wash-sale restriction. However, rules can change, and it is important to keep records clean and conservative.
How much does a COS Elite consultation cost?
The initial consultation is free. We review your situation and tell you directly what your real exposure is, what is fixable, and how much you are likely overpaying. If we can help, we build a custom engagement plan. In the vast majority of cases, the tax savings we identify exceed the cost of our service.
About the author
Garrett Taylor, CPA
Former Big Four CPA. CPA #133092. Garrett answers his phone. Led by expertise. Powered by precision.
Most crypto investors do not have a tax problem. They have a data problem. Wallets, exchanges, transfers, swaps, NFTs, DeFi positions — when the underlying ledger is messy, the IRS math gets messy, and that almost always falls on the side of you paying more than you actually owe.
This guide collapses three of the most expensive mistakes we see at COS Elite and shows exactly how to stop making them in 2026 — the year the 1099-DA, new cost-basis rules, and broker reporting all hit at once.
Key Takeaways
- ✓FIFO is the IRS default — it almost always maximizes your tax bill. Specific Identification can legally reduce your gain to zero on the same sale.
- ✓The new 1099-DA reports proceeds but not cost basis for most legacy holdings. If you leave basis blank, the IRS can tax 100% of proceeds.
- ✓Unrealized losses are not tax assets until you sell. Tax-loss harvesting turns down markets into real deductions — but only if your data is clean.
Reason 1: You Let FIFO Pick Your Lots
When you sell crypto, you do not pay tax on the sale amount. You pay tax on the gain — proceeds minus cost basis. The lot you sell determines the gain, and the gain determines the tax bill.
For sales after Dec 31, 2025, the IRS rule is plain: if you do not specify the units you are selling at the date and time of sale (and keep records), units are treated as sold from the earliest acquired first. That is FIFO by default.
Pro Tip
Long-term accumulators get hit hardest. Your earliest buys are usually your cheapest — so FIFO maximizes your taxable gain on the way out.
$7,600 vs $0
Taxable gain on the same 2 ETH sale — FIFO vs Specific ID (selling 2020 lots at $200 basis vs 2025 lots at $4,000 basis)
How to Qualify for Specific ID in 2026
Specific ID is not a checkbox. It is a documented identification of which units you are selling, set in place no later than the date and time of the sale, using identifiers your broker accepts — backed by adequate records.
Same Sale. Same Proceeds. Two Tax Outcomes.
| Method | Lots Sold | Cost Basis | Taxable Gain | Tax @ 24% |
|---|---|---|---|---|
| FIFO (default) | 2020 lots at $200 | $400 | $7,600 | $1,824 |
| Specific ID | 2025 lots at $4,000 | $8,000 | $0 | $0 |
“Sign a Specific-ID declaration with us before tax season starts. We file it, time-stamp it, and your method is on the record before you place a single trade.”
— Garrett Taylor, CPA
Reason 2: Your 1099-DA Is Missing Your Cost Basis
IRS final regulations under Treasury Decision 10000 phase reporting in over time. Brokers must report gross proceeds for sales on or after January 1, 2025, and basis only for sales of "covered" digital assets on or after January 1, 2026. A digital asset is covered only if it was acquired in that broker's custodial account on or after January 1, 2026 and held there continuously through sale. Everything else is noncovered — and your broker is not required to report basis on it.
$24,000 vs $7,200
Federal tax on $100,000 in proceeds — cost basis blank ($0) vs cost basis correct, at ~24% rate
Pro Tip
Even with the new mandatory basis rule, your broker only reports basis on "covered" assets. Crypto bought before 2026, anything moved between exchanges, and anything held in a self-custody wallet remains noncovered.
Why Your CPA Will Not Catch This
This is not a CPA failure. It is a specialization gap. Traditional CPAs file against the summaries they receive — they do not reconstruct wallet history, trace transfers across chains, or re-derive cost basis for tens of thousands of transactions. The return gets filed, the client gets over-taxed, and nobody realizes it.
Traditional CPA vs COS Elite
| Capability | Traditional CPA | COS Elite |
|---|---|---|
| Transaction history | Files based on summaries | Reconstructs full history |
| Cost basis | Accepts blanks or defaults | Documents per lot |
| Method selection | Defaults to FIFO | Optimizes (HIFO, tax-aware) |
| Loss harvesting | Not evaluated | Identifies harvestable losses |
| Deliverable | Tax return | Audit-ready 8949 + Schedule D |
“In the vast majority of cases, the tax savings we identify exceed the cost of our service. You should only pay tax on what you actually owe.”
— Garrett Taylor, CPA
Not sure if your cost basis is correct?
Book a free 30-minute consultation. We'll review your situation and tell you — directly, in plain English — what your real exposure is.
Talk to GarrettReason 3: You Never Harvested Your Losses
Tax-loss harvesting means selling crypto that is down (at a loss) so the loss becomes a real, usable tax asset. Sophisticated investors do not panic in down markets. They ask one question: what losses can we harvest to reduce taxes?
Three Ways Losses Save You Money
1. Offset gains: Realized losses cancel realized gains, dollar for dollar. The biggest single win.
2. Deduct income: Net excess losses deduct up to $3,000 against ordinary income each year.
3. Carry forward: Unused losses follow you into future years — useful when a big gain finally lands.
$2,250
Tax savings from one disciplined sell decision — harvesting $15,000 in losses against $20,000 in gains at 15% rate
Pro Tip
The wash-sale statute applies to "stock or securities," and the IRS treats virtual currency as property. Under current law, crypto is generally not subject to the stock wash-sale restriction. Rules can change — keep records clean and conservative.
“Tax-loss harvesting only works if your portfolio is reconciled and your basis is correct. Clean data first, smart selling second. Otherwise it is just a guess.”
— Garrett Taylor, CPA
Your 2026 Action Plan
Stop overpaying. Start owning your basis. A 4-step engagement that gets your data clean, your method on the record, and your filings audit-ready before tax season.
1. Book a Call — Free consultation with Garrett. Walk through your wallets, exchanges, and goals.
2. Custom Strategy — We build a personalized plan: lot method, harvesting calendar, entity moves.
3. Execution — COS Elite handles DAR, filings, entities, and IRS communications end-to-end.
4. Ongoing Support — Year-round advisory so you never miss a deadline, an opportunity, or a notice.
Bottom Line
Most overpayments do not happen at filing. They happen six months earlier, in your wallets — when nobody is paying attention to lots, basis, or transfers. The fix is not a better CPA. The fix is a CPA who understands crypto at the ledger level.
That is what COS Elite does. Bring your wallets, exchanges, and questions. We will tell you — directly, in plain English — what your real exposure is, what is fixable, and how much you are likely overpaying right now.
Ready to stop overpaying?
Book a free consultation with Garrett. Former Big Four CPA. License #133092. Garrett answers his phone.
Book a Free ConsultationFrequently Asked Questions
What is Specific Identification and how does it reduce my crypto taxes?
Specific Identification lets you choose which units (lots) of cryptocurrency you are selling. Instead of defaulting to FIFO (First-In, First-Out), which sells your cheapest, oldest coins first and maximizes gains, you can select lots with higher cost basis — potentially reducing your taxable gain to zero on the same sale.
What is the 1099-DA and why is my cost basis missing?
The 1099-DA is a new IRS form that crypto brokers must issue starting in 2025. For 2025 sales, brokers only report gross proceeds. For 2026 sales, they report cost basis only for "covered" assets — those acquired in and continuously held at the same broker since January 1, 2026. Legacy holdings, cross-broker transfers, and self-custody assets remain "noncovered" with blank basis.
Is crypto subject to wash sale rules?
Under current IRS guidance, virtual currency is treated as property, not stock or securities. The wash-sale statute applies to "stock or securities," so crypto is generally not subject to the 30-day wash-sale restriction. However, rules can change, and it is important to keep records clean and conservative.
How much does a COS Elite consultation cost?
The initial consultation is free. We review your situation and tell you directly what your real exposure is, what is fixable, and how much you are likely overpaying. If we can help, we build a custom engagement plan. In the vast majority of cases, the tax savings we identify exceed the cost of our service.
About the author
Garrett Taylor, CPA
Former Big Four CPA. CPA #133092. Garrett answers his phone. Led by expertise. Powered by precision.