Underwriting a Central Florida deal

Underwriting is the first skill you must build

Most investors buy their first property emotionally. They fall in love with a neighborhood, they assume rent is something the market hands them, and they mentally pencil a deal that only works in spreadsheet fantasy.

The investors who compound wealth over 10-30 years do something different: they underwrite every deal the same disciplined way, they trust the math more than the feeling, and they walk away from 90% of the properties they look at.

This lesson is the Central Florida–specific version of that discipline.

The four numbers every deal needs

Before anything else, you need four real numbers:

1. Total acquisition cost. Purchase price + closing costs (3-4% in Florida) + any immediate rehab. If you're buying for $550,000 and need $40,000 of make-ready work plus $18,000 of closing costs, your total is $608,000 — not $550,000.

2. Annual gross rent. Realistic market rent × 12. Not the Zillow rent estimate. Not the seller's pro forma. What the property will actually rent for, confirmed by comparable rentals in the same neighborhood within the past 6 months.

3. Annual operating expenses. Everything that flows out. In Central Florida: property taxes, insurance, HOA, maintenance reserve, vacancy reserve, management fee, capital expenditure reserve, utilities if you cover any.

4. Annual debt service. If financed: mortgage principal + interest. Amortization matters — your cash flow is P+I, but your wealth-building is principal paydown.

Cap rate — the simple measure

Cap rate = Net Operating Income ÷ Purchase Price

Net Operating Income (NOI) is gross rent minus operating expenses (before financing). A 6% cap rate means the property generates 6% of its purchase price in annual NOI.

Typical cap rates in Central Florida, 2026:

Long-term single-family rental, Dr. Phillips / Windermere: 3.5-5%
Long-term rental, Lake Nona: 4-5.5%
Long-term rental, East Orlando / Baldwin Park: 4.5-6%
Long-term rental, more suburban (Apopka, Ocoee): 5-6.5%
Duplex / small multi-family: 5.5-7%
Short-term rental, STR-approved submarket: 6-10%

What cap rate doesn't tell you:

Financing impact (you could have a great cap rate but negative cash flow if rates are high)
Appreciation potential
Tax impact
Your personal rate of return

Cap rate is a quick comparison tool — not a full picture.

Cash-on-cash return — the realistic measure

Cash-on-cash = Annual Pre-Tax Cash Flow ÷ Total Cash Invested

Example: you put $155,000 down + $18,000 closing + $40,000 rehab = $213,000 cash in. Annual pre-tax cash flow (after all expenses + debt service) is $14,000. Cash-on-cash = 6.6%.

This is the number that matters for operating returns. In 2026 Central Florida:

4-6% cash-on-cash on long-term rentals is typical
8-12% cash-on-cash on well-located short-term rentals (when legally permitted) is achievable
Below 3%: rethink whether this is actually an investment or just an appreciation bet
Above 15%: double-check your numbers; you may have missed expenses

DSCR — the lender's number

DSCR (Debt Service Coverage Ratio) = NOI ÷ Annual Debt Service

If NOI is $45,000 and annual mortgage P+I is $38,000, DSCR = 1.18.

Why it matters: most investment-property loans (especially DSCR-only loans, which don't verify personal income) require a minimum DSCR of 1.0-1.25. A 1.0 DSCR means rent exactly covers the mortgage — nothing left for vacancy, repairs, or profit. Lenders prefer 1.15-1.25+.

Your target: at least 1.20 to have meaningful cash flow after debt service.

The expense list that rookies miss

Central Florida-specific line items every deal needs:

Property taxes. Investment property doesn't get the homestead exemption. Assume ~1.5-2% of assessed value annually. Higher in Osceola and parts of Orange.
Insurance. 2026 rates: $2,800-$5,500/year on a $500K single-family, higher near water, plus wind/flood if applicable.
HOA + CDD. Common in newer master-planned communities. $150-$600/month HOA. Add a CDD bond on your tax bill.
Property management. 8-12% of gross rent for long-term; 20-30% for short-term. Sometimes more. Owners who "self-manage" still lose 5-10% in their own time.
Vacancy reserve. Model 5-8% for long-term, 25-40% for short-term.
Maintenance reserve. 5-10% of gross rent, higher on older properties.
Capital expenditure reserve. 5-8% of gross rent — roofs, HVACs, appliances, pool equipment.
Turnover costs. Make-ready between tenants. $500-$3,000 per turnover.
Leasing fees. If managed, often 50-100% of one month's rent for finding new tenant.
Licensing and registration. Some counties (Osceola) charge for STR licenses. Orange County requires business tax receipts.

Add these up and a "6% cap" pro forma turns into 4% in reality pretty fast.

The 50% rule — a sanity check

A rough sanity check used by experienced investors: operating expenses will be roughly 50% of gross rent, excluding mortgage.

If the seller's pro forma shows only 25% expenses, they're understating. If yours shows 75%, re-check — or walk. Most Central Florida rental properties operate at 42-55% expense ratios once all categories are properly accounted.

A realistic underwriting worksheet

For a $575,000 single-family in Lake Nona, long-term rental:

Purchase: $575,000
Closing costs: $17,000
Light rehab + furniture: $22,000
Total acquisition: $614,000
Down payment (25%): $143,750
Loan amount: $431,250
Interest rate: 7.25% investment (2026)
Monthly P+I: $2,943
Market rent: $3,200/month → $38,400/year gross

Operating expenses (annual):

Property tax: $10,000
Insurance: $4,200
HOA: $1,800
Maintenance: $2,500
Capital reserve: $2,500
Management (10%): $3,840
Vacancy reserve (6%): $2,300
Total opex: $27,140
NOI: $38,400 - $27,140 = $11,260
Cap rate: $11,260 / $575,000 = 2.0% — too low
Annual debt service: $35,316
Cash flow after debt: $11,260 - $35,316 = -$24,056

This is a common result in 2026 Dr. Phillips / Windermere / Lake Nona long-term rental math: negative cash flow. The property works only if you believe in appreciation.

Which is fine — just be honest about it. An appreciation-only play is a valid strategy if you can fund the monthly negative from other income, believe the market will appreciate 4-6% annually, and hold 7-15 years. It's not a cash-flow investment.

Where the numbers work better

Long-term rental math in Central Florida works better when:

You're paying cash (no debt service)
You're buying below market (estate sale, distressed, off-market)
You're buying in more suburban submarkets where price-to-rent ratios are better (Apopka, Ocoee, Clermont, Sanford)
You're doing short-term rental in an STR-approved area (see next lesson)
You're targeting multi-family, where price-to-rent is structurally better
Interest rates drop meaningfully

The bottom line

Underwrite every deal the same way, every time. Use real numbers, not seller pro formas. Walk away when math doesn't work. Over 10+ years, this discipline is worth more than any specific market insight.

Up next: Short-term rental rules by county and subdivision — where STRs are legal, where they're banned, and the HOA overlays that override everything.