Comprar Carro Novo vs Carro Usado: A Matemática que Ninguém Te Mostra

Scenario setup (cars as assets + financing + investing)

• Two buyers at a dealership in Brazil compare their options:

  • Lucas (new car)

    • Price: R$ 100,000
    • Has factory warranty
    • “No history”

  • Rafael (used car)

    • Age: 3 years
    • Mileage: ~40,000 km
    • “Up-to-date maintenance”
    • Price: R$ 69,500

• Cash price gap: R$ 30,500

  • Interpreted as new costing about 43.9% more.

Key depreciation / market-value claim (FIPE-based)

• A study using the FIPE table (Aug 2026) suggests that a top-selling model priced above ~R$ 102,000 becomes worth about ~R$ 81,000 after 1 year.
  • This implies a >20% drop in 12 months.
• Core argument:
  • The new buyer absorbs the first depreciation hit
  • The used buyer benefits because someone else already absorbed it.

Methodology / step-by-step framework used in the video

• Normalize the comparison:

  • Both buyers have the same income, same credit score, and same car budget
  • Both drive ~13,000 km/year
  • Fuel is excluded (assumed similar consumption)
  • All calculations are in today’s currency, with inflation discounted

• Down payment: both put down 20%

  • Lucas invests R$ 20,000
  • Rafael invests R$ 8,900

• Opportunity cost rule (core finance concept):

  • If one buyer spends less, the difference is invested immediately (not “lost”).

• Investment return assumption:

  • Uses ~5% per year above inflation, after tax (described as conservative).

• Ownership cost components included (beyond loan interest):

  • Vehicle tax (IPVA) varies by state
  • Insurance: estimated ~4% of car value per year
  • Maintenance:
    • New car: ~R$ 1,000 in year 1 (under warranty)
    • Used car: ~R$ 2,400 in year 1, increasing with age/mileage

• Financing term: 48 installments for both.

Loan / interest-rate comparison (Brazil credit context)

Central Bank data cited

• Average interest for vehicle loans: ~2% per month ≈ ~26% per year

Buyer-specific assumed loan rates

• Lucas (new loan rate): 1.6% per month (~21%/year)
• Rafael (used loan rate): 2.1% per month (~28%/year)

Loan amounts and estimated “interest paid”

• Lucas

  • Finances: R$ 80,000
  • Remaining payment noted: R$ 2,400

• Rafael

  • Finances: R$ 55,600
  • Remaining payment noted (with fee): R$ 1,850

• Rafael borrows R$ 24,400 less (about one-third smaller debt).

Total interest impact (up to the last installment)

• Estimated interest paid:
  • Lucas: ~R$ 35,200
  • Rafael: ~R$ 33,200
• Difference: ~R$ 2,000 over 4 years
• Explanation:
  • Interest accrues monthly on remaining principal
  • Even a slightly higher rate matters across 48 payments
  • Example: Rafael’s first installment (R$ 1,850) is estimated as ~R$ 1,170 interest and <R$ 700 principal

Recommendation / caution on financing comparison

• Don’t compare only the headline interest rate.
• Request and compare CET (Total Effective Cost), which includes interest, taxes, fees, and insurance.

Ownership cost timeline + monthly investing advantage

IPVA used for the base case

• For 2026, IPVA varies approximately:
  • 1.9% in Paraná (lowest cited)
  • Up to ~4% in São Paulo / Minas Gerais / Rio
• Base case assumes 4% (São Paulo).

Year 1 monthly costs (base case)

• After fees/taxes/insurance/maintenance:
  • Lucas spends ~R$ 3,150/month
  • Rafael spends ~R$ 2,513/month
  • Rafael’s monthly surplus to invest: ~R$ 637
  • Annual surplus: ~R$ 7,600

Surplus decays in early years (then slows later)

• Year 2 surplus: ~R$ 492
• Year 3 surplus: ~R$ 446
• Reason: the used car requires more maintenance as it ages, while Lucas benefits from warranty early on.

Net worth comparison after 4 years (when loans end)

Loan payoff status

• Both finish financing at ~4 years:
  • Cars are fully paid
  • No remaining debt

Car values at end of year 4

• Lucas (car is now 4 years old): ~R$ 64,500
• Rafael (car is now 7 years old): ~R$ 53,500

Rafael’s invested savings accumulated

• Rafael’s investment balance:
  • ~R$ 34,600
  • From day 1 R$ 6,100, plus monthly surpluses

Total assets / net worth after 4 years

• Lucas assets: ~R$ 64,500 (no meaningful investable balance described)
• Rafael assets:
  • ~R$ 53,500 (car) + R$ 34,600 (investments)
  • = ~R$ 88,100
• Net worth difference: about ~R$ 24,000 in favor of Rafael

Attribution: what drove the result

• Depreciation outcomes:

  • Lucas: R$ 100,000 → R$ 64,500 (lost R$ 35,500, ~R$ 9,000/year)
  • Rafael: R$ 69,500 → R$ 53,500 (lost R$ 16,000, less than half)

• Despite higher loan-cost risk and higher maintenance, Rafael still wins early because of:

  • Lower initial depreciation
  • Disciplined investing of the monthly surplus

Beyond 4 years: when Lucas starts catching up

Year 5 monthly costs (after financing ends)

• Lucas: ~R$ 697/month
• Rafael: ~R$ 773/month
• First time Lucas spends less monthly:
  • Lucas surplus to invest: ~R$ 70/month
  • Rafael continues investing but with a smaller surplus

Compounding effect

• Rafael already has >R$ 34,000 invested
• At ~5%/year, earnings alone are about ~R$ 140/month
• That’s nearly double Lucas’s ~R$ 70/month

10-year projection (cars typical in Brazil)

Macro statistic cited

• Average car age in Brazil: ~11 years and 5 months (Sim de Peças, 2026).

Assumed endpoints at 10 years

• Lucas (age 10 car):

  • Value: ~R$ 45,500
  • Plus invested: ~R$ 6,000
  • Total: ~R$ 51,600

• Rafael (age 13 car):

  • Value: ~R$ 39,500
  • Plus invested: >R$ 46,000
  • Total: ~R$ 85,900

10-year net worth difference

• The gap remains in Rafael’s favor by about ~R$ 34,000 (as stated).

Where the advantage comes from in the “second half”

• After year 4, both cars lose value more similarly.
• Most divergence is driven by early years:
  • Rafael’s advantage grows about ~R$ 24,000 in the first 4 years
  • Then grows by only ~R$ 10,000+ over the next 6 years

Sensitivity / limitations explicitly mentioned

The calculation does not include:

• Major unforeseen mechanical failures (e.g., engine/gearbox), which may be more likely in older cars
• The possibility that insurance becomes proportionally more expensive or harder to obtain for older vehicles
  • These omissions could tip results toward Lucas.

Sensitivity to tax regime (IPVA)

• Recalculation using Paraná IPVA of 1.9%:
  • Rafael’s first-year monthly saving drops from 637 → ~584
  • Final advantage after 10 years becomes ~R$ 30,600
• Conclusion:
  • The gap changes, but Rafael remains ahead

Explicit “real-world” recommendation / rule of thumb from the video

• The best deal is not necessarily the one with the lowest sticker price.
• Before signing, evaluate the total monthly cost, not just the loan statement:
  • financing interest + CET
  • taxes, insurance, maintenance
  • and what you can invest with the monthly surplus
• Rule:
  • Postpone the next car change as long as possible
  • Frequent switching resets depreciation + financing interest cycles.
• If the investment component is removed (i.e., Rafael spends every leftover surplus), the outcome can flip:
  • In a “no investing” scenario, Lucas would be ahead by ~R$ 6,000 after 10 years.

Disclosures / disclaimers

• No explicit “not financial advice” disclaimer appears in the provided subtitles.

Tickers / assets / instruments mentioned

• No public tickers (stocks/ETFs/crypto) are mentioned.
• References include:
  • FIPE (Brazil car pricing index/table)
  • Selic rate and COPOM decision context
  • A generic fixed-income investment assumption yielding returns of ~5%/year above inflation after tax (no specific fund/ETF named)

Presenters / sources (as referenced)

• Scenario participants: Lucas and Rafael (example buyers)
• Cited authorities/sources:
  • Banco Central do Brasil (vehicle loan interest context)
  • COPOM (Selic cut reference; dated Sept 16, 2026)
  • FIPE table (Aug 2026) for depreciation example
  • Sim de Peças (2026) for average car age