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Your Form 1099-DA from Uphold shows what you sold and the proceeds. But for many transactions, especially older ones or assets transferred from another wallet the cost basis may be blank or $0 for reporting your 2025 transactions (cost basis will be reported on the form for transactions starting in 2026).
Why Cost Basis Goes Missing on Uphold
For the 2025 tax year, brokers like Uphold were required to report gross proceeds on Form 1099-DA, but not cost basis. That requirement doesn’t kick in until the 2026 tax year. So your 1099-DA tells the IRS what you sold and for how much, but not what you paid.
Cost basis can also be missing when:
- You transferred crypto to Uphold from another wallet or exchange
- You received crypto as a gift, airdrop, staking reward, or hard fork
- The original purchase records are incomplete or held by a different platform
If you file with $0 cost basis, you’ll pay taxes on the full sale amount, not just your actual gain. That could be a costly mistake.
Here’s how to fix that before you file.
Step 1: Download Your Full Transaction History from Uphold
Log in to Uphold.
- Go to Activity in the left menu.
- Select the date range covering the full tax year.
- Click Export CSV to download your transaction history.
Uphold supports multiple asset types. Make sure the export covers all crypto transactions, not just a single asset.
Step 2: Reconcile with Summ’s 1099-DA Portal
Once you have your records, upload your Uphold 1099-DA to Summ. Summ automatically matches your transactions to what’s reported on your 1099-DA, so you can see exactly where cost basis is present, where it’s missing, and what needs to be resolved.
For any gaps, Summ guides you step-by-step to either supply the missing data or flag the transaction appropriately before you file.
Step 3: Generate Your Tax Report and File
After reconciliation, generate your tax reports through Summ. Your capital gains calculations will reflect accurate cost basis rather than $0, so you’re not overpaying the IRS.
Start here: Open the 1099-DA Portal in Summ
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