AIR-GAPPED TAX SOFTWARE

Your taxes.
Your computer.
Nobody else involved.

AirGapTax prepares your federal return entirely on your device. No cloud. No telemetry. No subscription. Buy the 2025 edition once; file your 2025 returns whenever — late, amended, on time.

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Buy once per tax year. No subscription. No auto-renewal.

AirGapTax — 2026 Federal Return
1040
Sch A
Sch B
Sch C
Sch D
8949
Filing statusSingle
Wages (W-2)$82,400
Interest income$1,230
Standard deduction($15,000)
Taxable income$68,630
Federal tax$10,852
Refund$1,548
No telemetry
No subscription
100% local by default
External AI only if you opt in

Everything you need. Nothing you don't.

Document import

Drop in your documents

W-2, 1099s, crypto CSVs. Drag, drop, done. OCR extracts the numbers.

Live review

Live 1040 math

Edit any line. Watch AGI, tax, and refund update instantly. Schedule A toggle built in.

Export packet

Print, sign, mail

Generate a complete, IRS-ready filing packet with the correct mailing address for your state. Print it, sign it, mail it — nothing ever leaves your machine.

PUBLIC AUDIT — TY2025 ENGINE

Machine-verified, not human-reviewed.

Most tax software rests on a person checking the work. AirGapTax rests on a deterministic engine: the same return always produces the same numbers, and every result is checked by machine against 100 synthetic personas, all 9 IRS Pub 1436 scenarios, and three independent tax calculators — then independently cross-audited by GPT (Codex GPT-5), a different AI model with no coordination with our team. All artifacts are SHA-256 hashed and publicly downloadable. We don't ask you to trust a reviewer; we hand you reproducible receipts.

Read our SHA-256 audit →

Privacy by design.

Zero telemetry. All tax computation runs locally. The built-in AI assistant works offline with no network calls. If you choose to enable optional external AI backends (Groq, Ollama, or a custom endpoint), that traffic goes only where you point it — and you can disable it at any time. Your tax data never touches our servers.

Read Our Privacy Policy

Buy once per tax year.

No subscription. No auto-renewal. The 2025 edition is yours to keep — file 2025 returns whenever.

Free

Simple W-2 federal returns

Free
  • Single + MFJ filing statuses
  • W-2 income only
  • Standard deduction
  • Print-ready 1040 mail packet
  • Local-only — no cloud, no telemetry
  • Federal only — no states included

Complete

Full federal + crypto + 1099s

$129 $99 one-time
  • All 4 filing statuses
  • W-2, all 1099s, SSA-1099, 1099-G
  • Schedule A itemized deductions
  • Schedules B, D + Form 8949
  • Crypto: Coinbase / Kraken / Binance / Gemini CSV
  • Wash-sale detection
  • CTC + EITC credits
  • 1 state included (when available)
  • IRS-ready mail packet (print + sign + mail)

Pro

Self-employed + Schedule C/E/F + year-round planning

$229 $179 one-time
  • Everything in Complete
  • Schedule C (self-employed / 1099-NEC)
  • Schedule E (rental + royalty income)
  • Schedule F (farm income)
  • Self-employment tax + quarterly estimates
  • Year-round tax planning tools
  • 3 states included (when available)
  • Priority email support

Elite

Investor / multi-business / family office

$399 $299 one-time
  • Everything in Pro
  • RSU / ISO / ESPP / AMT planning
  • K-1 workflows (partnership + S-corp passthrough)
  • Multi-business Schedule C (multiple side businesses)
  • Multi-taxpayer file (spouse + dependents in one place)
  • Multi-year what-if scenario modeling
  • Audit-response packet generator
  • 5 states included (when available)
  • $149 human CPA review credit included

Existing owners get 25% off next year's edition. Terms of Service

AirGapTax is tax computation software, not tax advice. All outputs are drafts. All sales final.

Built so we can't see your taxes.

Air-gapped by design. On your machine. Always.

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