Is Airbnb a good investment? A Charleston short-term rental, run through the math
Is Airbnb a good investment? For a lot of investors in Charleston the honest answer in 2026 is "less than it looks on the listing." The gross revenue is real. What changes the picture is everything that comes out before the owner sees any of it.
My partner Caleb owns short-term rentals and long-term rentals, some of them paid off, and he has been moving capital out of them and into the fund. His summary: taxes, insurance, repairs and turnover have eaten the returns, and he doesn't expect appreciation to bail them out for a while. That is one operator's experience. Below is the math, with sources, so you can check it against your own. (For traditional twelve-month leases, see the companion post: is rental property a good investment?)
What a Charleston Airbnb earns
AirDNA tracks the Charleston short-term rental market at about 8,590 active listings. The average listing earned $86,600 in the twelve months through September 2026, at 63% occupancy and a $435 average daily rate (AirDNA, updated Oct 4, 2026). Revenue is up sharply year over year. So is supply: AirDNA counts 135% more active listings than a year ago, which is more competition for the same guests.
Other trackers come in lower. Rabbu put average Charleston revenue near $67,000 with 40% occupancy, and Airbtics near $74,000. We use AirDNA's higher figure below, which flatters the rental.
That $86,600 is gross. AirDNA's own definition is revenue before host expenses, including cleaning fees paid by guests.
Is Airbnb a good investment after fees, taxes and the mortgage?
Here is one illustrative property. It is not a real deal and your numbers will differ. Every input is either sourced or labeled as an assumption.
The purchase. A house at $704,000, the median Charleston County single-family sale price in September 2026 (Post and Courier, CTAR data). Investment-property financing with 25% down: $176,000 of equity and a $528,000 loan. A 30-year fixed at 7.28%, the Freddie Mac average as of October 1, 2026 (Freddie Mac PMMS). Investment-property rates usually run higher than that average, so this is generous too.
The year, self-managed:
| Line | Amount | Basis |
|---|---|---|
| Gross revenue | $86,600 | AirDNA Charleston average listing |
| Airbnb host service fee | ($13,423) | 15.5%, the single-fee rate most hosts now pay (Airbnb) |
| Cleaning | ($11,250) | assumption: ~75 turnovers at $150 |
| Utilities and internet | ($3,600) | assumption: $300/month |
| Supplies | ($1,800) | assumption: $150/month |
| Repairs and maintenance | ($6,495) | 7.5% of revenue, mid-range of the usual 5–10% |
| Insurance | ($3,370) | South Carolina average projected premium; coastal policies usually cost more |
| Property tax | ($12,672) | estimate: 6% assessment ratio × ~0.30 millage |
| Licensing, accounting | ($1,000) | assumption |
| Net operating income | ($32,990) | 4.7% of the purchase price |
| Mortgage payments | ($43,352) | $528,000 at 7.28%, 30 years |
| Cash flow | ($10,362) | before vacancy surprises or a new roof |
Operating costs come to about 62% of revenue. That sits at the top of the 40–60% range industry sources quote for owned short-term rentals, mostly because of two lines that hit South Carolina investors hard.
Property tax. South Carolina assesses a primary residence at 4% of market value and a second home or rental at 6%, and owner-occupied homes are also exempt from school operating millage. A rental pays more tax on the same house than its owner-occupied neighbor.
Insurance. Coastal South Carolina premiums have climbed 20–35% (in some places costs have even 2-3x) since 2023, and a July 2026 report projected the state among the steepest increases in the country over the next decade (Live 5 News).
Hire a full-service manager, which in Charleston typically costs 20–30% of revenue, and another $17,000 or more comes off.
Negative leverage: when the mortgage costs more than the house earns
The core problem is in two numbers. The property earns about 4.7% on its price before financing. The bank charges 7.28%. When borrowed money costs more than the asset yields, every dollar of debt makes the return worse. That is negative leverage, and at 2026 rates it is the default outcome for a lot of short-term rentals.
Paying cash fixes the cash flow but not the yield. A paid-off version of this house nets about $33,000 a year on $704,000 of capital, the same 4.7%.
The Charleston rule most out-of-town buyers miss
Inside the City of Charleston, a residential short-term rental must be the owner's primary residence, verified by the county's 4% legal-residence assessment. Investment properties are not eligible, except commercially zoned properties in one small overlay district (City of Charleston STR FAQ). Guests are capped at four adults, and the permit renews every year. Neighboring towns and the unincorporated county set their own rules, so check the exact address before you buy.
The same $176,000 in a fixed-rate note
The alternative we offer is a different kind of investment, so the comparison needs care.
At 890 Capital, investors buy notes issued by the fund. The fund makes short-term, first-position loans to real estate investors, mostly in the Charleston tri-county, and pays note holders a fixed rate: 10% on a one-year note, 10.5% on three years, 10.75% on five, with interest paid monthly by the 5th (Easy Cash Flow).
The $176,000 down payment from the example, placed in a three-year note at 10.5%, pays $18,480 a year, or $1,540 a month. There are no guests, cleaners or insurance renewals. The underwriting, servicing and collections are the fund's job, and the fund has closed 232 loans since April 2024.
What the rental gives you that a note doesn't
A fair comparison has to include this side.
- Appreciation. A note pays its rate and returns principal. It never rises in value. A house can. Charleston County's median price was down 3.6% year over year in September, but over long periods Lowcountry real estate has appreciated, and an owner keeps that upside.
- Debt paydown. The mortgage in the example retires about $5,000 of principal in year one. That is equity, though it isn't cash.
- Tax treatment. Depreciation can shelter rental income, and some short-term rental owners use it aggressively. Interest from a note is generally taxed as ordinary income. Talk to your CPA, because this alone can change the answer.
- Control and use. You choose the property, the price, the renovation and the exit, and you can stay there.
- Liquidity. Neither is liquid. A note is committed for its term, and the PPM sets the renewal and withdrawal terms. A house takes months to sell.
And the risks of a note are real. Borrowers pay late, some loans need workouts, and your principal is not insured. First-position liens and conservative loan-to-value (capped at 75%, averaging in the mid-60s) are there to protect principal, but they don't make it guaranteed.
So, is Airbnb a good investment?
It can be: for an owner-occupant who rents part of a home, for someone who will self-manage and wants the tax treatment, or for a buyer who got in at a lower price and rate. For an investor buying a Charleston house with financing today, mainly for income, the numbers above are hard to make work.
If you are weighing it, run your own version of the table first. If the cash flow is negative, ask whether you're buying a business or a hope for appreciation.
If you want to compare against monthly, fixed-rate income, read how a first position mortgage protects fund capital, browse our news and updates, or request investor access to see the offering documents. For a neutral primer on weighing risk, the SEC's Investor.gov guide is a good place to start.
This article is for informational purposes only and is not an offer to sell or a solicitation of an offer to buy any security. Any offering is made only to accredited investors under Regulation D Rule 506(c), by means of the fund's private placement memorandum, which describes the risks. The short-term rental example is illustrative, uses third-party market data and stated assumptions, and does not describe any specific property. Investing in private credit involves risk, including the possible loss of principal. Past performance does not guarantee future returns. Nothing here is tax advice. See 890capital.com for full disclosures.