Interactive Investment Analysis
What Could Your Next Lowcountry Property Actually Return?
A free investment calculator for Hilton Head, Bluffton, and the surrounding Lowcountry — built to show you real numbers, not a seller's highlight reel.
Try the Calculator Below ↓
Built For
Hilton Head Island • Bluffton • Sun City • Beaufort • Daufuskie Island • the greater Lowcountry
Comprehensive
Investment Calculator
Interactive
And Adjustable
2 Views
Cash Flow Analysis & Equity Growth
Fully
Customizable
How This Tool Works
Enter the price, financing terms, and rent assumptions for a property you're evaluating — real or hypothetical — and both tabs below recalculate instantly.
Tab 1
Cash Flow & Operating Analysis
Answers "does this specific deal pencil out?" Set the purchase price, down payment, rate, rent, and vacancy for the property you're evaluating, and watch cash flow, cap rate, DSCR, and every standard investment metric respond in real time.
Tab 2
Total Return & Equity Growth
Answers a longer question: what does ownership build over five years? Layer in your own appreciation outlook and see equity growth, principal paydown, and total return unfold year by year — not just today's snapshot.
Cash flow today, equity tomorrow — see both before you decide.
Illustrative Planning Tool
Hilton Head Island Investment Calculator
Explore what an investment property on Hilton Head Island could return. Adjust any input — every number recalculates instantly. Two views: today's cash flow, and what ownership builds over time.
Property & Financing
Rental Type
Short-Term Rental
Long-Term Rental
I know monthly rent
I know nightly rate (ADR)
Snowbird / Multi-Month Booking (STR only, optional)
No
Yes, I have one
Fixed Expenses
Self-Managed Host Costs (STR / Snowbird)
Revenue Breakdown
--
--
--
--
Estimated Value of Personal Use: $0 — an estimated opportunity-cost value based on your typical nightly rate, not actual cash received. Not included in cash flow, NOI, or any return metric below.
Acquisition Summary
--
Initial Investment
--
Monthly P&I
--
Loan Amount
--
Annual NOI
Investment Metrics
| Metric | Result | Target | Status |
|---|---|---|---|
| Monthly Cash Flow | -- | -- | -- |
| Cash-on-Cash Return | -- | -- | -- |
| Cap Rate | -- | -- | -- |
| 50% Rule | -- | ≤ 50% | -- |
| 1% Rule | -- | ≥ 1.0% | -- |
| DSCR | -- | -- | -- |
Break-Even Vacancy — A Genuine Stress Test
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How far your primary rental stream's occupancy could drop before the property stops covering its own costs (snowbird income, if any, held fixed). Higher is safer — compare against the typical 15% comfort threshold.
Vacancy Sensitivity
| Vacancy Rate | Monthly Cash Flow | Cash-on-Cash |
|---|---|---|
| 25% Vacancy (Strong Occupancy) | -- | -- |
| 30% Vacancy | -- | -- |
| 35% Vacancy (Your Setting) | -- | -- |
| 45% Vacancy (Stress Test) | -- | -- |
Leverage Sensitivity
| Down Payment | Cash-on-Cash | DSCR |
|---|---|---|
| 25% Down | -- | -- |
| Your Setting | -- | -- |
| 50% Down | -- | -- |
Management Fee Scenarios
| Scenario | Monthly Cash Flow | Cash-on-Cash | Cap Rate |
|---|---|---|---|
| Self-Managed (0% fee) | -- | -- | -- |
| Your Setting (Blended) | -- | -- | -- |
| Property Management (typical 15–20%) | -- | -- | -- |
Carried over from Tab 1: this 5-year model uses your combined-revenue annual cash flow of -- and your current loan amount of --. Change any input on Tab 1 to update this projection.
Assumptions
2% — Conservative
3% — Moderate
5% — Optimistic
Year 5 Snapshot
--
Equity at Year 5
--
Total Return ($)
--
Total Return (%)
--
Net Proceeds if Sold
5-Year Projection (Combined Cash Flow)
| Year | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| Loan Balance | |||||
| Principal Paid Down | |||||
| Estimated Property Value | |||||
| Equity | |||||
| Cumulative Cash Flow | |||||
| Total Return ($) | |||||
| Total Return (%) | |||||
| Net Proceeds if Sold |
Trust & Philosophy
Why I Designed This Tool
Most calculators online run on generic national averages — a flat vacancy assumption, a placeholder management fee, no reference point for what regime fees or short-term rental economics actually look like in this market. This tool's defaults are grounded in published rates and typical local figures instead of guesswork — see Assumptions & Sources below for exactly what that means and where the numbers come from. And when a number doesn't clear a target, it stays a miss — I don't move the goalposts to make a deal look better than it is. That's the same standard I hold every custom analysis to.
Want to Keep Your Numbers?
Once you've configured the calculator for a property you're actually considering, click Print / Save Summary and enter your email — I'll send you a clean copy of your results, exactly as you set them up.
If you're evaluating a specific property anywhere in the Lowcountry, I'd welcome the chance to build out a complete pro forma and market comparison around it — the same depth of analysis this tool is built on.
Request a Custom Property Analysis
Corbett Cummings, Realtor®
Real Estate Advisor | Real Brokerage
Transparency
Assumptions & Sources
This calculator loads with default starting values so you have somewhere to begin — not because they describe any specific property already on the market. Every one of them is a representative, typical figure for this market, and every one is visible and adjustable. Here's where they come from:
Airbnb Host Fee
Defaults to Airbnb's published 3% host-only fee — a real, publicly documented rate, applied to collected rent.
Regime / HOA Fees, Insurance, Taxes
Default figures reflect typical ranges seen across comparable Lowcountry beach-villa communities — representative estimates, not the actual costs of any specific listing. Every real property's regime fees, insurance, and tax bill vary and must be confirmed individually.
Property Tax Structure
South Carolina assesses non-owner-occupied property at a 6% ratio vs. 4% for a primary residence — a real, publicly documented rule, not a market estimate.
Vacancy & Financing Defaults
Starting points chosen to reflect commonly cited, conservative planning assumptions for single-unit short-term rentals — adjust freely for your own market read.
Bottom line: the defaults are a credible starting point, not a substitute for verifying the real numbers on a property you're actually considering.
Reference
Understanding the Metrics
New to these terms? Cash-on-Cash Return and Cap Rate are the two most useful for comparing properties side by side — start there before digging into the rest.
Cash Flow
What's left over each month after every expense and the mortgage payment are paid — the actual cash in your pocket.
Cash-on-Cash Return
Annual cash flow divided by the actual cash you put in (down payment + closing costs). Measures return on your invested dollars, not the full purchase price.
Cap Rate
Net operating income divided by purchase price — a measure of return as if you'd paid all cash, ignoring financing. Useful for comparing properties on equal footing.
DSCR
Debt Service Coverage Ratio — net operating income divided by the mortgage payment. Lenders typically require above 1.20x; it shows how comfortably rental income covers the loan.
50% Rule
A quick-check guideline that operating expenses (excluding the mortgage) typically run near 50% of collected rent. A useful sanity check, not a hard law.
1% Rule
Another quick screen: monthly rent divided by total acquisition cost. 1%+ is the commonly cited threshold for a deal worth a closer look — a filter, not a final answer.
Break-Even Vacancy
How far rental income could drop before the property stops covering its own costs. Higher is safer — it's your margin for error.
NOI
Net Operating Income — rental income minus all operating expenses, before the mortgage payment. The building block most other metrics are calculated from.
Quick Reference
Frequently Asked Questions
Is this financial or investment advice?
No. This tool is for illustrative planning purposes only and does not constitute financial, investment, tax, or legal advice. Run your own numbers, and talk to a qualified financial advisor, accountant, or attorney before making a purchase decision.
Where do the default numbers come from, and how accurate are they for my situation?
They're representative figures grounded in published rates and typical Lowcountry market data — not any one property's actual costs. See Assumptions & Sources above for the full breakdown of each default and where it comes from.
Can I use this for a specific property I'm already considering?
Yes — just swap in that property's real price, fees, and rent assumptions. And if you'd like a full custom pro forma and market comparison built around it, no pressure at all — just reach out using the "Request a Custom Property Analysis" link above.
Does this account for Hilton Head's short-term rental rules, HOA restrictions, or STR licensing requirements?
No — this tool assumes the property is rental-eligible and does not verify STR licensing, HOA/regime rental restrictions, or local ordinances. Always confirm current rental rules and licensing requirements for the specific property and community before purchasing; these vary by community and can change.
What happens to my email if I save my results?
[PRIVACY ANSWER — TO BE SUPPLIED]