Coast FIRE Calculator

What is Coast FIRE Calculator?

Estimate whether current savings can grow to a FIRE target without further contributions.

• Estimate FIRE targets, retirement withdrawals, and retirement cash flow.
• Compare how expenses, savings rate, and return affect retirement timing.
• Create a rough but actionable model for long-term financial independence.

Scope and country basis

English pages are intended for English-speaking markets. Use the country/currency selector for United States, United Kingdom, Canada, Australia, or China where available.

Policy-sensitive results vary by jurisdiction. When a local rule is not implemented, the calculator uses your entered rates, deductions, premiums, or assumptions instead of pretending one country fits all.

What each input means

Annual expenses

Money field, formatted in the selected currency.

Current savings

Money field, formatted in the selected currency.

Annual return

Percentage field: enter 8 for 8%.

Years

Number field: enter the value that matches your scenario.

Formula and interpretation

The core formula is: Coast value = Current savings × (1 + return)^years. If a country/currency selector is available, money is formatted for that market. Policy-sensitive fields use the selected market where implemented, otherwise they remain user-entered assumptions.

Use the result for first-pass comparison, budgeting, scenario planning, and discussion prep. Before filing taxes, applying for credit, buying insurance, or investing, verify the result against local rules, contracts, and professional advice.

Key concepts

Key inputs for this tool

Coast FIRE Calculator mainly depends on Annual expenses, Current savings, Annual return, Years. Keep time period, currency, and definitions consistent before comparing outputs.

Replacement rate

Retirement income often targets a share of pre-retirement spending.

Withdrawal rate

Higher withdrawals increase depletion risk.

Pension assumption

Public, workplace, and personal retirement systems differ by country.

How to read the result

• Read the core Coast FIRE Calculator output first, then the supporting metrics and scenarios rather than cherry-picking one favorable number.
• Look first at retirement cash-flow gap.
• Stress-test lower returns, higher inflation, and longer life.
• Separate public pension, workplace plan, personal savings, and insurance.

How to use it

1. Enter savings, contributions, expenses, return, and pension assumptions.
2. Review FIRE target, retirement cash flow, or withdrawal capacity.
3. Adjust expenses, return, and saving pace to compare retirement timing.
4. Before long-term planning, verify pensions, benefits, taxes, and household risks.

Common mistakes

• Treating the 4% rule as a guarantee.
• Ignoring healthcare, long-term care, and inflation.
• Applying U.S. account rules to another country.

Suggested workflow

1. Estimate target spending and income gap.
2. Test savings rate, return, and retirement age.
3. Review with pensions, annuities, personal savings, and insurance.

Method and review boundary

This calculator runs a local estimate from the inputs and formula shown on this page. It does not retrieve live rules, rates, underwriting decisions, or quotes from banks, tax authorities, insurers, or other providers. Last reviewed: July 24, 2026.

For tax, lending, insurance, retirement, investment, or contract decisions, verify official guidance, the relevant agreement, and a formal quote for your location. Use this result to compare scenarios and prepare questions, not as financial, tax, investment, or legal advice.

Method notes and official sources

The page sets a FIRE target at 25 times the user-entered annual expenses and compounds current savings once per year at the entered constant return for the entered years, with no additional contributions; the displayed gap is target minus that future value. The 25-times multiple is a planning heuristic, not an official threshold or safe-withdrawal guarantee. The model mixes a fixed expense target with nominal future assets and excludes inflation, taxes, fees, contributions, withdrawals, changing expenses or returns, losses, volatility, sequence risk, asset allocation, pension or public benefits, health costs, and longevity.

The page calculates locally only from user-entered values. It does not connect to lenders, regulators, tax or social-insurance authorities, bank or investment accounts, or other live data sources. Results are estimates, not an approval, offer or quote, tax or statutory-contribution determination, or financial, tax, legal, or investment advice. Currency selection changes formatting only and does not perform FX conversion or load local rates, taxes, or contribution rules.

• Investor.gov: Compound Interest Calculator and return assumptions - U.S. Securities and Exchange Commission
• Investor.gov: Asset allocation, inflation, and investment risk - U.S. Securities and Exchange Commission
• CFPB: Retirement planning, income, assets, and debt considerations - Consumer Financial Protection Bureau

Sources checked July 27, 2026. These are government, regulatory, or first-party references. Laws, loan and lease terms, rates, fees, taxes, social-insurance, and statutory-contribution rules can change; verify the applicable authority, contract, disclosures, and lender before a formal decision.

FAQ