The question arrives with frequency on WhatsApp, in meetings, over Sunday lunch. “Does it make sense to buy or keep renting?” And the answer that almost everyone gives is quick, confident, and based on almost nothing. This article does the full math, with real Florianópolis data from 2026, with no pro-purchase nor pro-rental bias.
1. The Question That Seems Simple (But Isn’t)
Most people compare two incomparable things: the mortgage payment with the rent amount. This reasoning ignores at least four critical variables.
- Variable 1 — The true opportunity cost of your down payment. With LCILCIVer tudo → earning 92% of CDI (IR-exempt), R$ 180,000 would yield R$ 1,888/month net. Every month. This needs to be factored into the equation.
- Variable 2 — Transaction costs. ITBI, notary recording, bank appraisal. In Florianópolis, the buyer pays ~3.7% of the property value before paying the first mortgage installment.
- Variable 3 — Your holding horizon. Anyone who stays in the property for two years and then sells will almost certainly lose money. Anyone who stays fifteen years has likely made a significant gain.
- Variable 4 — The appreciation specific to the property you choose. Florianópolis appreciated +8.21% in the 12 months ending March 2026. But that average hides neighborhoods that rose 5% and neighborhoods that rose 34%.
2. The Negative Spread That Nobody Mentions
Gross Rental Yield in Florianópolis: ~5.6% p.a.
FipeZAP calculates the average rental yield for residential properties in Florianópolis at 5.60–5.96% per annum (December 2025). By property type:
- 1 bedroom: 6.72% p.a.
- 2 bedrooms: ~5.5% p.a.
- 3 bedrooms: ~5.0% p.a.
- 4 or more bedrooms: 4.77% p.a.
After deducting real estate management fee (8–10%), IPTUIPTUVer tudo →, vacancy (~3%), and maintenance (~0.5–1%), the true net yield on a 3-bedroom apartment in Florianópolis ranges between 3.0% and 4.5% per annum.
LCI at 92% of CDI (IR-Exempt): ~13.34% p.a. Net
In May 2026, the Selic stands at 14.50% per annum. An LCI at 92% of CDI yields ~13.34% per annum net automatically, without work, without tenants, without water damage.
Negative Spread of −8.84 to −10.34 pp
Spread = Net yield on property − LCI return = 3.0–4.5% − 13.34% = −8.84 to −10.34 percentage points per annum.
For a down payment of R$ 180,000, this opportunity cost represents R$ 22,000–R$ 24,000 per year left on the table. By itself, this data does not mean renting is always better—it means that in the short term, pure mathematics favors the disciplined renter who invests the difference.
3. The Overhead of Buying in Florianópolis
ITBI: 2% (Confirmed — Municipal Supplementary Law 683/2019, City of Florianópolis)
ITBIITBIVer tudo → in Florianópolis is 2% of the sale value. For an apartment worth R$ 900,000 with 80% financed, the total ITBI comes to approximately R$ 18,000.
Summary of purchase overhead for a R$ 900,000 property:
| Item | Amount |
| ITBI (2%) | R$ 18,000 |
| Notary recording (~1.2%) | R$ 10,800 |
| Bank appraisal | R$ 1,200 |
| Mortgage Insurance + Title Insurance (1st year) | R$ 3,600 (estimate) |
| Total up-front overhead | ~R$ 33,600 (~3.7% of value) |
4. The Complete Simulation — 3-Bedroom Apartment, R$ 900,000 in Florianópolis
Parameters: property value R$ 900,000, down payment R$ 180,000 (20%), financed amount R$ 720,000, term 30 years, rate 11.19% p.a. + TR (~12.4% p.a. effective), amortization system SACSACVer tudo →.
Under the SAC system, constant monthly amortization: R$ 720,000 ÷ 360 months = R$ 2,000. Month 1 interest: R$ 720,000 × 1.033% per month = R$ 7,440. Insurance ~R$ 250/month.
Initial payment: ~R$ 9,690/month
Cost to rent an equivalent: ~R$ 5,500/month (3-bedroom apartment, mid-range neighborhood FLN).
Break-Even — When Purchase Exceeds Rental
| Year | SAC Payment | Rent | Buyer Equity | Renter Equity | Advantage |
| 1 | R$ 9,690 | R$ 5,500 | R$ 180,000 | R$ 180,000 | Tie |
| 3 | R$ 8,900 | R$ 6,534 | ~R$ 430,000 | ~R$ 410,000 | Buyer |
| 5 | R$ 8,450 | R$ 7,763 | ~R$ 661,000 | ~R$ 490,000 | Buyer |
| 10 | R$ 7,210 | R$ 11,955 | ~R$ 1,289,000 | ~R$ 695,000 | Buyer |
| 15 | R$ 6,100 | R$ 18,394 | ~R$ 2,121,000 | ~R$ 670,000 | Buyer |
Break-even occurs between Year 2 and Year 4 with +7% p.a. appreciation (conservative assumption, below the +8.21% recorded in 12 months through March 2026).
5. Florianópolis Changes the Equation
Historical Appreciation +8.21% (12 Months, Mar 2026)
FipeZAP recorded appreciation of +8.21% in the 12 months through March 2026. Florianópolis is consistently the 2nd most expensive capital city in Brazil by sale price per m², with an average of R$ 13,106/m² in March 2026.
Break-Even with Realistic Appreciation: 2–4 Years
| Property appreciation scenario | Approximate break-even |
| +10% p.a. (optimistic) | ~1–2 years |
| +7% p.a. (conservative — basis of simulation) | ~2–4 years |
| +5% p.a. (moderate — national average) | ~5–7 years |
| +3% p.a. (pessimistic) | ~10–12 years |
| +0% p.a. (real stagnation) | Never (renter wins) |
6. When Renting Makes More Sense Than Buying in Florianópolis
- Holding Horizon Less Than 2 Years: Rent, No Question — The ~R$ 33,600 in purchase overhead plus 6% brokerage on exit make any short-term gain disappear.
- When Selic Is Falling: When Selic drops to 10%, LCI yields ~9.2%. The spread shrinks and the purchase decision becomes more favorable.
- The Right Property Hasn’t Appeared Yet: Buying the wrong property under pressure is one of the most common and most expensive mistakes.
8. Frequently Asked Questions
Is it worth buying property in Florianópolis in 2026?
Yes, for those with a holding horizon greater than 3–5 years, available down payment without compromising emergency reserves, and the ability to carry the initial payment without excessive leverage. Florianópolis appreciates consistently above the national average (+8.21% in 12 months through Mar 2026). For horizons shorter than 2 years, rent is financially superior in virtually all scenarios.
What is the ITBI in Florianópolis?
ITBI in Florianópolis is 2% of the sale value, per Municipal Supplementary Law 683/2019. For a R$ 900,000 property, total ITBI comes to approximately R$ 18,000.
What is the average price per m² in Florianópolis in 2026?
According to FipeZAP, the average residential sale price per m² in Florianópolis was R$ 13,106/m² in March 2026. By neighborhood: Agronômica R$ 15,818/m², Downtown R$ 14,041/m², Trindade R$ 12,333/m², Ingleses R$ 9,025/m², Coqueiros R$ 9,462/m².
Buy-to-rent in Florianópolis still worthwhile?
As pure income investment, the return is not attractive at current Selic levels. Net yield ranges from 3% to 4.5%—far below the 13.34% net from an LCI at 92% CDI. The property makes sense as an investment when property appreciation is factored in as part of total return.
