How Long Will It Last? is a small, focused publisher of financial-longevity calculators. We build one thing well: refined tools that answer a single question — how long will your money last?
Our mission
Most financial software is dense, cluttered, and built for advisors rather than the people using it. We think ordinary people deserve better. Our calculators are designed for clarity first: enter a few numbers, see a clear answer, and understand how each assumption changes the outcome. No spreadsheets, no jargon, no upsell.
What we make
Every tool on this site is designed for education and planning awareness. They are not brokerage products, not investment advice, and not tied to any financial institution. We do not sell your data, and we do not track individual users across the web.
Why we built this
Whenever a friend or family member asked a question like "how long will my retirement last?" or "how far does this savings go?", the existing answers online were either paywalled, hidden behind a lead form, or buried inside a bloated calculator. We wanted the answer to be one tap away — and to feel like it was made with care.
What's next
We're expanding into 401(k), savings, emergency funds, mortgage runway, and business runway calculators. Each one shares the same design language and the same idea: give you a clear, honest answer about your money.