Two specifics drive most of the difference between the two regimes:
1. The abatement. Micro-foncier discounts gross rents by 30% before tax; micro-BIC discounts by 50%. On €12,000 of gross rent, the taxable base is €8,400 unfurnished vs €6,000 furnished — about 28% less tax under furnished, before any other consideration.
2. Amortissement. Under furnished régime réel (LMNP), the building (excluding land) can be amortised under Article 39 C of the CGI — typically split into components (structure 25–40 years, finishings 10–20 years, technical systems 8–15 years) and deducted as an expense each year. This deduction does not exist under revenus fonciers (unfurnished régime réel). For a property worth €300,000 (of which roughly €240,000 is building, €60,000 land), amortissement of 2.5% per year on the building portion produces €6,000 of annual deductible expense — without any cash actually leaving your account. Combined with deductions for actual expenses (loan interest, works, insurance, syndic, taxe foncière), amortissement frequently drives taxable rental income to zero or near-zero for the first 8–15 years of an LMNP investment.
Important LMNP rule: amortissement is capped. Under Article 39 C, the annual amortissement deduction cannot exceed the rental income net of other deductible expenses — meaning amortissement cannot itself create a tax loss. Unused amortissement is carried forward indefinitely against future rental income, but it never becomes a deficit foncier you can offset against your salary. This is materially different from unfurnished régime réel, where deficit foncier can be offset against general income up to €10,700 per year (Article 156 I-3° CGI).
3. Social contributions — and the 2026 LMNP-only hike. Until the LFSS 2026 (loi n° 2025-1403 du 30 décembre 2025), both regimes attracted the same 17.2% prélèvements sociaux for French tax residents (CSG 9.2% + CRDS 0.5% + prélèvement de solidarité 7.5%) on net rental income, under Article L136-7 of the Code de la Sécurité Sociale. Article 12 of the LFSS 2026 raised the CSG rate from 9.2% to 10.6% on the revenus du capital category that includes BIC location meublée — bringing the LMNP rate to 18.6% on 2025 income filed in 2026.
The 2026 split for residents:
- Location nue (revenus fonciers): 17.2% — the LFSS 2026 hike explicitly excludes revenus fonciers from the CSG increase. The unfurnished rate is unchanged on 2025 income.
- LMNP (BIC meublé): 18.6% — the new rate applies to net BIC income on the 2025 filing year. Because the 2025 prélèvements à la source acomptes were calibrated at the old 17.2%, the year-end reconciliation in September 2026 will produce an additional PS payment equal to the 1.4-percentage-point gap on the LMNP income base. Plan for the cash-flow shock.
For a property generating €15,000 of net LMNP income, the 1.4-point hike adds €210 of social contributions for the 2026 filing — small absolute but a structural reason the unfurnished/furnished gap narrows on the social-contributions axis. Sources: legifrance.gouv.fr for loi n° 2025-1403 art. 12 ; service-public.gouv.fr/particuliers/vosdroits/F2329 ; impots.gouv.fr CSG 2026 page.
For non-resident landlords, the EU/EEA/Switzerland-affiliated rate stays at 7.5% (Article L136-7-I bis CSS) — the LFSS 2026 hike applies to CSG, which non-residents in the EU/EEA/CH zone do not pay. See our non-resident landlord first-year guide for the full split.