Example 1 — French Studio Apartment / Paris suburbVariables filled in the prompt: [PROPERTY DETAILS]: Studio apartment — Montreuil (93), Paris suburb — purchase price €180,000 — estimated monthly rent €850 (unfurnished long-term) [FINANCING DETAILS]: Down payment €36,000 (20%), loan €144,000 at 3.8% over 20 years [ANNUAL COSTS]: Property tax €800/year, building insurance €350/year, co-ownership charges €1,200/year, maintenance provision €1,800/year, no management fees (self-managed) [TAX SITUATION]: Income tax bracket 30% — considering LMNP regime (furnished rental) to benefit from depreciation — currently unfurnished [INVESTMENT OBJECTIVE]: Balanced — positive cashflow preferred but willing to accept slight negative cashflow if capital appreciation potential is strong Generated output:▸ PROPERTY FINANCIAL SNAPSHOT ParameterValuePurchase price€180,000Acquisition costs (8% notary fees)€14,400Total capital deployed€194,400Down payment€36,000Total equity invested (down payment + acquisition costs)€50,400Loan amount€144,000Monthly mortgage payment (3.8% / 20 years)€859Gross monthly rent€850Annual gross rent€10,200▸ COMPLETE YIELD AND RETURN TABLE MetricValueBenchmarkAssessmentGross yield5.67%4-6% = moderateModerate — acceptable for Paris suburbNet yield (before financing)3.21%>4% = goodBelow target — costs are significantCap Rate3.21%>4% preferredLow — typical for Île-de-France marketCash-on-cash return-10.2%>5% = goodNegative — property does not self-financeTotal ROI (with principal paydown)-2.8%>8% = targetMarginally negative in base casePayback periodN/A<15 yearsNot applicable — negative cashflow▸ MONTHLY CASHFLOW BREAKDOWN ItemMonthly AmountGross rental income+€850Vacancy allowance (6%)-€51Effective monthly income+€799Mortgage payment-€859Property tax (monthly)-€67Building insurance-€29Co-ownership charges-€100Maintenance provision-€150Total monthly costs-€1,205Monthly net cashflow-€406The property generates a monthly deficit of €406 — the investor must contribute €406 per month from personal income to cover the shortfall.▸ TAX IMPACT SUMMARYCurrent regime (unfurnished — régime réel): Taxable income = €9,996 (effective rent) - €4,150 (deductible costs excl. mortgage) - €5,472 (mortgage interest year 1) = €374 Tax at 30% + social charges (17.2%) = €177 additional taxLMNP switch recommendation (furnished rental): Switching to LMNP with furnished rental would allow depreciation of the property: Annual depreciation = (€180,000 × 85% building portion) / 25 years = €6,120 Annual furniture depreciation (estimated €8,000 furniture) / 7 years = €1,143 Total annual depreciation shield = €7,263 Tax saving at 47.2% combined rate = €3,428 per year = €286 per month Revised monthly cashflow with LMNP: -€406 + €286 = -€120 per monthKey tax optimization: switching from unfurnished to furnished rental under LMNP regime reduces the monthly deficit by €286 — transforming a costly investment into a near-neutral cashflow position while building equity.▸ STRESS TEST RESULTS MetricBase CaseConservativeOptimisticMonthly rent€850€765 (-10%)€935 (+10%)Vacancy rate6%9%4%Maintenance€150/month€225/month€100/monthMonthly cashflow (unfurnished)-€406-€538-€261Monthly cashflow (LMNP)-€120-€252+€25Cash-on-cash return (LMNP)-2.9%-6.0%+0.6%Break-even occupancy rate142%N/A — impossible98%Note: the break-even occupancy at 142% in the base case confirms this property does not cashflow positively even at 100% occupancy under the current unfurnished regime. Under LMNP, break-even occupancy drops to 98% — achievable but leaving minimal margin.▸ INVESTMENT VERDICTWATCH — Do not buy at current price without either renegotiating or switching to LMNP furnished regime first.Strengths: (1) Montreuil benefits from strong capital appreciation potential — Grand Paris Express station proximity (line 11 extension) has driven consistent price growth of 3-4% annually, making total return positive when appreciation is included (2) LMNP switch significantly improves the economics — at -€120/month under LMNP vs -€406 unfurnished, the investment becomes manageable as a long-term equity-building vehicle (3) Strong rental demand in the 93 market — vacancy risk is low, supporting the base case rental assumptionsRisks: (1) The investment never achieves positive cashflow under the unfurnished regime — if LMNP status is lost (co-ownership restriction on furnished rentals is common in French copropriétés), the monthly deficit triples (2) Rising interest rates could increase the mortgage payment if refinancing is required (3) Co-ownership charges at €1,200/year are stated but should be verified — older Montreuil buildings often have deferred maintenance votes that can produce extraordinary charges of €2,000-€5,000One action to improve the return profile: negotiate the purchase price to €165,000 (an 8.3% reduction). At €165,000, the gross yield rises to 6.2%, the monthly deficit under LMNP reduces to approximately €40/month, and the conservative scenario becomes near-neutral. Given current market conditions in the 93, a 5-8% negotiation below asking price on a studio is realistic.⚠️ DISCLAIMER: This analysis is for educational and informational purposes only and does not constitute financial or investment advice. Real estate investment involves significant risks. Always consult qualified local professionals before making investment decisions.