I made a retirement simulator: 125 years of data, 25 countries
Details
- External ID
- 49452974
- Source
- HN
- Company
- —
- Product
- I made a retirement simulator: 125 years of data, 25 countries
- Website domain
- foresightplanner.com
- Launched
- Aug. 26, 2026
- Cohort
- —
- Upvotes
- 16
- Upvotes percentile
- 0.7116935483870968
- Tags
- —
- Fetched at
- Sept. 10, 2026, 5:32 a.m.
- Updated at
- Sept. 10, 2026, 5:32 a.m.
Enrichment
- Theme
- indie hacker passion projects
- Vertical
- Fintech
- Function
- Analytics & BI
- Audience
- B2C
- AI stance
- Not AI
- Project type
- Commercial product
- Normalized one-liner
- retirement planning simulator with historical data
- Manually corrected
- False
Could you build this?
Partial The financial calculator web app is simple, but licensing or compiling 125 years of cross-country historical return/inflation data (e.g., Dimson-Marsh-Staunton) and accurate tax modeling represents significant domain and data hurdles.
What it would actually take: A Next.js frontend coupled with a Monte Carlo/historical backtesting simulation engine running client-side in Web Workers or server-side. The key proprietary bottleneck is obtaining and maintaining the licensed historical asset return and inflation dataset across 25 countries (such as DMS dataset), alongside encoding complex multinational tax brackets, pension rules, and sequence-of-returns formulas.
Discussion
20 comments analyzed.
Competitors mentioned: Existing retirement calculators (mentioned as 'tried and true against US history')
Concerns raised: GDPR compliance blocking EU/EEA/UK/CH access, Missing country-specific tax and benefits (NZ Super, German data gaps), Questionable withdrawal rates with international data (2.2% vs 3.5% US-only), Account requirement for saving detailed plans, Limited to 0.5% withdrawal rate increments in Quick Check
Feature requests: Add life events for financial disasters (job loss, divorce, medical crisis), Manual override for draw order across accounts, Country-specific UI and tax treatment (France, Germany, New Zealand), Correlation modeling between income and market performance, Flexible spending modes beyond fixed withdrawal rates
Competitors
Other products that read as similar to this one — 100 launches clear the similarity bar, closest 8 shown.
Attention rank: #28 of 101 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 296 days after the earliest competitor.
- Hindsight Simulator · hn · 2026-04-10 · 12 upvotes · similarity 0.50
- I made a simulator for personal finance (5 year update) · hn · 2026-05-03 · 7 upvotes · similarity 0.47
- Portfolio simulator using trend-following indicators and rebalance API · hn · 2026-06-13 · 5 upvotes · similarity 0.47
- How long do I need to work at my salary before I can coast, or retire? · hn · 2026-09-24 · 51 upvotes · similarity 0.45
- HELP ME RETIRE · ph · 2026-09-07 · 1 upvotes · similarity 0.44
- I built a microlearning app to learn personal finance · hn · 2026-06-10 · 8 upvotes · similarity 0.44
- Investment Journey Simulator · ph · 2026-09-26 · 4 upvotes · similarity 0.43
- cash-flow-forecasting · github · 2026-09-24 · 18 upvotes · similarity 0.43
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a analytics & bi tool for Legal yet.