{"uid":"cap_metxAUimZf-IMkStc6DE3","slug":"purchase-fire-impact-calculator-47d95bcb","name":"Purchase FIRE Impact Calculator","description":"Purchase impact on FIRE timeline calculator. Runs the FIRE net-worth simulation twice — with and without a one-time purchase amount deducted at a given year — and reports how many years that purchase delays financial independence, quantifying its true opportunity cost.","url":"https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/purchaseFireImpactCalculator?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"swr":{"type":"number","default":0.04,"description":"Safe withdrawal rate, as a fraction. Default 0.04."},"purchaseYear":{"type":"number","default":0,"description":"Number of years from now the purchase is made. Default 0."},"inflationRate":{"type":"number","default":0.03,"description":"Expected annual inflation rate, as a fraction. Default 0.03."},"purchaseAmount":{"type":"number","description":"One-time purchase amount."},"currentNetWorth":{"type":"number","description":"Current invested net worth."},"currentAnnualIncome":{"type":"number","description":"Current annual take-home income."},"investmentReturnRate":{"type":"number","default":0.07,"description":"Expected annual investment return, as a fraction. Default 0.07."},"currentAnnualSpending":{"type":"number","description":"Current annual spending."},"retirementAnnualSpending":{"type":"number","description":"Expected annual spending in retirement."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_EOPRh613MvzLoAFx_Ipxu","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates how many years a one-time purchase delays your FIRE (Financial Independence, Retire Early) date by running the net-worth simulation with and without the purchase deducted","exampleAgentPrompt":"I'm thinking about buying a $35,000 car right now. I have $200,000 invested, take home $80,000 a year, spend $50,000 a year currently and expect to spend $45,000 a year in retirement — can you tell me how many years that car purchase would push back my FIRE date, assuming a 7% return, 3% inflation, and a 4% safe withdrawal rate?","exampleUseCases":[{"title":"Car purchase retirement impact","prompt":"I'm considering buying a $40,000 car this year. My current net worth is $150,000, I earn $75,000 take-home, spend $55,000 per year now and plan on $40,000 in retirement. How many years does that car delay my FIRE date using a 7% return, 3% inflation, and 4% safe withdrawal rate?"},{"title":"Home renovation opportunity cost","prompt":"We're about to spend $80,000 on a kitchen renovation 2 years from now. My invested net worth is $300,000, take-home income is $100,000, current spending is $70,000 and retirement spending will be $60,000. How many years does that renovation push back my financial independence date?"},{"title":"Luxury vacation FIRE delay","prompt":"I want to take a $15,000 dream vacation next year. I have $90,000 saved, make $60,000 after tax, spend $42,000 per year, and expect $38,000 a year in retirement. Tell me how much that vacation delays my FIRE date assuming default return and inflation assumptions."}],"resultDescription":"Returns a comparison of two FIRE simulation runs — one baseline and one with the purchase amount deducted at the specified year — showing the resulting FIRE dates for each scenario and the number of years the purchase delays financial independence","failureModes":["Missing required fields (purchaseAmount, currentNetWorth, currentAnnualIncome, currentAnnualSpending, retirementAnnualSpending) return a 400-level error","Negative or zero net worth or income values may produce nonsensical projections","Extremely high spending relative to income may cause the simulation to never converge on a FIRE date","Invalid rate values (e.g. SWR or return rate above 1 or below 0) may cause unexpected results"],"whenToPreferThis":"Use this endpoint when you need to quantify the true opportunity cost of a specific one-time purchase on a user's FIRE timeline, running a dual simulation comparison. Prefer this over a general FIRE calculator when the user is weighing a specific discretionary expense and wants to know its retirement delay in years, not just the dollar amount foregone.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T06:41:56.039Z","isFirstParty":false,"canonicalSlug":"purchase-fire-impact-calculator-47d95bcb"}