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Multi-Jurisdiction Options Tax Calculator & Basis Tracker
A SaaS platform that lets international options traders calculate cost basis and tax treatment of options positions according to their specific jurisdiction's rules, rather than defaulting to US conventions. Users import trades via broker APIs and receive jurisdiction-correct cost basis calculations, assignment tax event handling, and tax-season reports.
Why this matters
You are an options trader based outside the United States, executing complex strategies like deep ITM short puts on US-listed equities. Your broker shows cost basis using IRS rules that do not apply to you, and your local tax authority provides little to no guidance on how option premiums should be treated when you are assigned shares. You spend hours Googling foreign tax rulings and piecing together treatment from forum discussions, never fully confident you are calculating your basis correctly. Come tax season, you resort to expensive professional consultations or risky guesswork, knowing a mistake could cost you thousands in penalties or overpaid tax.
- · Built for Non-US options traders (initially UK, Australia, New Zealand, Canada) who trade US-listed options and need to calculate tax treatment under their local rules rather than US IRS rules.
- · Most likely monetization: SaaS subscription with freemium tier (limited trades) and paid tiers for active traders and tax professionals.
The Pain · Narrative
You are an options trader based outside the United States, executing complex strategies like deep ITM short puts on US-listed equities. Your broker shows cost basis using IRS rules that do not apply to you, and your local tax authority provides little to no guidance on how option premiums should be treated when you are assigned shares. You spend hours Googling foreign tax rulings and piecing together treatment from forum discussions, never fully confident you are calculating your basis correctly. Come tax season, you resort to expensive professional consultations or risky guesswork, knowing a mistake could cost you thousands in penalties or overpaid tax.
Score Breakdown
Market Signal
Go-to-Market
Non-US retail options traders executing 10+ options trades per month on US-listed equities, particularly in UK, Australia, New Zealand, and Canada
~30K-50K sophisticated non-US options traders who would benefit immediately
Organic content in options trading communities and SEO targeting jurisdiction-specific options tax queries
$29/month for individual traders, $99/month for tax professionals managing multiple clients
50 paying users within 60 days of launch, validated through community engagement and SEO-driven signups
MVP Scope · 1–2 weeks
- Research and document options tax treatment rules for US, UK (HMRC), Australia (ATO), New Zealand (IRD), and Canada (CRA)
- Design the tax rule data schema that can represent premium-as-income vs premium-as-basis-reduction and timing differences
- Build the core calculation engine in Python that takes a trade lifecycle and jurisdiction and outputs cost basis and tax events
- Create a simple web UI with React for manual trade entry and jurisdiction selection
- Set up PostgreSQL database schema for users, trades, positions, and calculated tax events
- Integrate Interactive Brokers API for automatic trade import and position syncing
- Build the assignment/exercise tax event handler that recalculates basis according to selected jurisdiction rules
- Create tax-year summary report generator producing downloadable PDFs formatted for each supported jurisdiction
- Add user authentication, subscription billing via Stripe, and freemium tier limits
- Write comprehensive disclaimers and terms of service, then deploy MVP and begin community outreach
Differentiation
Why This Might Fail
Self-rebuttal — the most important trust signal
- 1Tax rule interpretation errors could lead to user financial harm and legal liability, especially if users rely on calculations without professional review — a single high-profile error could destroy trust irreparably.
- 2The addressable market of non-US options traders who need this specific tooling may be too small to sustain a standalone SaaS, particularly if users only subscribe during tax season.
- 3Broker API integrations are fragile and frequently change, creating ongoing maintenance burden that could consume development resources better spent on core tax logic.
Evidence Summary
How AI synthesized this insight — no verbatim quotes
Multiple commenters in the discussion highlighted the gap between US-centric broker cost basis displays and the actual tax treatment needed by international traders. One user explicitly noted that broker cost basis is built on US rules and is not the tax answer for non-US residents. Another referenced HMRC's different treatment found via independent Google research. The original poster described making strategic trading decisions worth tens of thousands based on tax efficiency considerations in New Zealand, yet could not find clear local guidance. The discussion spanned at least three jurisdictions (US, UK, NZ), indicating broad cross-border demand.
Action Plan
Validate this opportunity before writing code
Recommended Next Step
Build
Strong demand signals detected. Real pain, real willingness to pay — start building an MVP.
Landing Page Copy Kit
Ready-to-paste copy based on real Reddit community language — no editing required
Headline
Multi-Jurisdiction Options Tax Calculator & Basis Tracker
Sub-headline
A SaaS platform that lets international options traders calculate cost basis and tax treatment of options positions according to their specific jurisdiction's rules, rather than defaulting to US conventions. Users import trades via broker APIs and receive jurisdiction-correct cost basis calculations, assignment tax event handling, and tax-season reports.
Who It's For
For Non-US options traders (initially UK, Australia, New Zealand, Canada) who trade US-listed options and need to calculate tax treatment under their local rules rather than US IRS rules
Feature List
✓ Broker API integration for automatic trade import (IBKR, Schwab, Tradier) ✓ Jurisdiction-specific cost basis calculator (premium as income vs. basis reduction) ✓ Assignment and exercise tax event tracker with correct local treatment ✓ Tax-year summary reports formatted for local tax authority filing ✓ Multi-leg strategy tax impact preview before execution ✓ Pre-trade tax impact calculator showing after-tax returns for multiple outcome scenarios ✓ Side-by-side comparison of alternative strategies with different tax profiles ✓ Assignment and exercise scenario modeling with jurisdiction-specific treatment
Where to Validate
Share your landing page in r/r/options — that's exactly where these pain points were discovered.
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