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Coast FIRE Calculator

Coast FIRE Calculator finds your exact Coast FIRE number instantly.

Checked 3 Oct 2026 Reviewed by Alex Listed since June 2025

Screenshot of Coast FIRE Calculator

At a glance

Starts at $40 per year Price as published by the vendor, September 2026.
Free tier Yes
Platforms Web
Best for Retirees, young savers

4.0 out of 5

Scored by Alex after real use

Our verdict

It calculates when you can stop saving for retirement. Best suited for those looking to retire early but might not be ideal if inflation rates are higher than expected.

✓What it does well

Instant updatesResults refresh instantly as you enter data.
Interactive growth chartView your portfolio's projected growth over time.
Simplified calculationsNo need to adjust for inflation yourself; the tool handles it.

✕Where it falls short

Doesn't handle real returnsCalculates based on nominal investment return only.
Limited assumptionsOnly allows common planning assumptions like a 7% nominal return, which might not be accurate for all users.
No long-term projections beyond retirement ageDoesn't project outcomes after reaching the Coast FIRE number.

Key features

Safe withdrawal rateUses a classic '4% rule' for calculations.
Custom inputsAllows input of current invested assets, monthly contributions, and more.
Age rangesWorks well with age ranges from young savers to near-retirees.
Long-term projectionsProjects outcomes beyond retirement age

Questions about Coast FIRE Calculator

What does Coast FIRE Calculator do?

Coast FIRE Calculator finds a person's Coast FIRE number instantly, showing when they can stop saving for retirement. It takes inputs such as current invested assets and monthly contributions, refreshes results instantly, and shows projected portfolio growth over time on an interactive chart.

Is Coast FIRE Calculator free?

Coast FIRE Calculator has a free tier at $0, and a paid plan starts at $40 per year, as published by the vendor in September 2026. The calculator runs on the web, where results refresh instantly as figures are entered.

What assumptions does Coast FIRE Calculator use?

Coast FIRE Calculator uses the classic 4% rule as its safe withdrawal rate. The reviewer notes that it only allows common planning assumptions, such as a 7% nominal return, which might not be accurate for all users.

Who is Coast FIRE Calculator for?

Toolio lists Coast FIRE Calculator as best for retirees and young savers, and the vendor says it works with age ranges from young savers to near-retirees. The reviewer says it is best suited to those looking to retire early.

How does Toolio score Coast FIRE Calculator?

Coast FIRE Calculator has a Toolio score of 4.0 out of 5, given by Alex after real use on 3 Oct 2026. The reviewer credits its instant updates and its interactive growth chart, which shows a portfolio's projected growth over time.

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