Crypto tax exposure modeling

See your estimated crypto tax exposure before you sell.

A clean crypto disposal tax handoff for review, records, or CPA support. Every export delivers a Tax Handoff PDF and Tax Handoff CSV, with the Proof Archive included.

Manual input. No wallet connection. No filing.

Start a SnapshotFree to create · $29 for the Tax Handoff PDF + CSV

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Latest Snapshot BreakdownSealed

Estimated tax exposure$12,100.00

Proceeds$85,000.00

Realized Gain$55,000.00

Net After Exposure$42,900.00

Estimated tax exposure

$12,100.00

See the likely tax impact before the sale becomes irreversible.

How it works

Three steps to a Tax Handoff export.

Estimate Exposure

Enter the sale details and review the estimated tax impact before you act. Every assumption is visible and editable.

Lock the Scenario

Preserve the assumptions and result as a sealed snapshot. Once locked, the record cannot be altered.

Export for Review

Download the Tax Handoff PDF and Tax Handoff CSV. The Proof Archive is included for records support. Your accountant opens the files and never needs access to Sigil One.

What you get

Tax Handoff PDF and Tax Handoff CSV, with Proof Archive included.

Every paid export delivers two primary artifacts: the Tax Handoff PDF and the Tax Handoff CSV. The Proof Archive is included as secondary trust support, with the underlying ledger, exposure summary, assumptions, and verification manifest. Nothing requires access to Sigil One.

Proof Archive contents10 files

README.txtOrientation surface. Handoff hierarchy.Start here

SigilOne_Report.pdfHuman-readable report.

sigil_report.txtPlain-text report.

explanation_narrative.txtWhat the numbers mean, in plain language.

transaction_ledger.csvModeled transaction record.

exposure_summary.csvExposure totals and breakdown.

tax_assumptions.txtAssumptions used in the model.

SigilOne_Tax_Handoff.csvTax handoff data, in spreadsheet form.

SigilOne_Export.csvLegacy compatibility export.

MANIFEST.jsonVerification manifest.Verifiable

Note: SigilOne_Export.csv remains for legacy compatibility.

Paid output proof

What the paid export looks like

Primary

Tax Handoff PDF

Human-readable summary for review, records, or CPA support.

Primary

Tax Handoff CSV

CSV Field Preview

AssetBTC

Quantity0.50

Buy Date2024-01-21

Sell Date2026-05-10

Proceeds$52,000

Cost Basis$31,000

Realized Gain$21,000

Estimated Exposure$6,120

Net After Tax$45,880

Illustrative fields. Actual export reflects your scenario inputs.

Spreadsheet-ready disposal data with proceeds, cost basis, realized gain or loss, rates, estimated tax exposure, and net after tax.

Secondary trust support

Proof Archive included

Sigil One Proof Archive contents preview

Record support for the preserved scenario, including README, manifest, ledger, assumptions, report, and verification context.

Integrity

Every exported scenario keeps a verifiable record.

Verified Scenario Snapshots

Each snapshot preserves the assumptions, modeled result, and full context of the scenario you ran. You can verify the record hasn't changed at any time after export.

Under the hood, a SHA-256 checksum chain links every snapshot to the one before it, creating a tamper-evident history. The verification screen confirms integrity on demand, and green means intact.

MANIFEST.jsonintegrity verified ✓

Sigil One export status showing Tax Handoff PDF, Tax Handoff CSV, and Proof Archive downloads

By design

You control every assumption.

✓Visible assumptions

✓Manual input by design

✓Immutable scenario snapshots

✓Tax Handoff PDF and CSV with Proof Archive

✓No wallet connection required

✓No filing claims

✓No form generation

Every number in the system was entered by you, reviewed by you, and confirmed by you. No wallet connections. No imported transaction noise. Every assumption is visible before export.

Sigil One is not tax filing software. It does not generate forms, connect to exchanges, or claim to know what you owe. It estimates the exposure, preserves the scenario, and gives your CPA something concrete to review.

Built with an internal FSP readiness layer that helps prevent incomplete assumptions from becoming paid export artifacts.

Context

Broader holdings for context.

Track your wider portfolio alongside the sale scenario you modeled, so the full picture is available when you or your CPA need it.

Pricing

Snapshots are free. You only pay when you export.

Founder's Launch Price

$29

per export

Create and review snapshots. Always free.

Snapshot export ($29). Tax Handoff PDF and Tax Handoff CSV. Proof Archive included as secondary trust support.

Holdings export ($29). Unified PDF of your portfolio holdings, purchased separately.

Verifiable record you can check at any time. No export required.

No subscription. Pay only when you export

Start a Snapshot

Common questions

What Sigil One does, and does not do.

Is this tax filing software?

No. Sigil One estimates exposure. It does not file taxes, generate official forms, or make claims about what you owe.

Do I need to connect a wallet or exchange?

No. All input is manual. Sigil One never connects to wallets, exchanges, or any external financial system.

What does it cost?

Creating and reviewing snapshots is free. You only pay when you export. Each export is $29. The snapshot export delivers the Tax Handoff PDF and Tax Handoff CSV, with the Proof Archive included as secondary trust support. The holdings export gives you a unified PDF of your portfolio holdings. These are separate purchases.

Can my CPA use the export without the app?

Yes. Both the snapshot export bundle and the holdings PDF are self-contained. Your accountant can review the data without ever accessing Sigil One.

Model the sale before you make it.

Estimate the exposure, preserve the record, and export the Tax Handoff PDF and CSV.

Start a Snapshot

See how it works ↑