Should I Wait for Interest Rates to Drop Before Buying a House in Charleston SC?

I get asked this more than almost any other question, and I've noticed that most of us in this business answer it the same lazy way: "Date the rate, marry the house." It's catchy. It's also not an argument. It's a slogan designed to get you to buy today, and you can tell it's not an argument because nobody who says it ever shows you the math.

So let me try to do better, using a framework I ran across recently that I think is genuinely more useful — and then let me tell you honestly where that framework breaks down, and who actually should wait.

The Buffett argument almost nobody explains correctly

I've been reading The New Tao of Warren Buffett, the 2024 collection Mary Buffett and David Clark put together, and it sent me back to the original Buffett material on housing. Buffett has been making the same point since at least 2011, and it's worth understanding because it's structural, not motivational.

Buffett has repeatedly called the 30-year fixed-rate mortgage one of the best financial instruments available to an ordinary person. Not a burden to be paid off fast — an instrument, deliberately used. His logic, which he's described as a "one-way bet," runs like this:

When you take a 30-year fixed mortgage, you lock your interest cost for three decades. If rates fall later, you refinance and capture the lower rate. If rates rise, your rate does not move. You have the option to benefit from one direction and no obligation to absorb the other. The lender is holding the interest-rate risk. You aren't.

Buffett has framed it as a one-way renegotiation: if you turn out to be wrong about where rates were headed, you simply pay the loan off with a new one.

There's a second layer, and this is the part that almost never makes it into a real estate blog. Buffett has described a fixed-rate mortgage as a way to effectively short the dollar. You're borrowing today's dollars and repaying them over thirty years with future dollars that inflation has made less valuable. Your principal and interest payment is frozen in nominal terms while wages, rents, insurance, property taxes, and construction costs all keep moving.

He didn't just say it — he did it. When Buffett bought a Laguna Beach house in 1971 for $150,000, he financed it rather than paying cash, deliberately keeping his capital free to invest elsewhere. He has said it was the only mortgage he'd carried in fifty years.

Now — here's the part where I part ways with how most agents deploy this quote.

What the Buffett argument does NOT say

It does not say a house is a great investment. Buffett has separately, and bluntly, said the opposite: that buying a house is often a lousy investment once you account for the down payment, the interest, the property taxes, the insurance, and the opportunity cost of capital that could have been in the market instead. His own Omaha house, bought in 1958 for $31,500 and now worth something north of $1.4 million, is a roughly 4,300% return — and he's still said he would have made more money renting and putting the difference into stocks.

He's also warned, in his 2010 shareholder letter, that a house becomes a nightmare when a buyer's eyes are bigger than his wallet and a lender is happy to enable it.

So the honest version of the Buffett position is narrower than the slogan: the 30-year fixed mortgage is an excellent instrument, and stretching beyond your means to use it is still a mistake. Both are true simultaneously. Anyone quoting only the first half is selling you something.

With that framing in place, let's put real Charleston numbers against it.

Where rates actually are right now

As of the Freddie Mac Primary Mortgage Market Survey released August 20, 2026, the 30-year fixed averaged 6.65%, down from 6.67% the prior week. A year earlier it was 6.58%. The 15-year averaged 5.95%.

Two things stand out. First, we are essentially flat year over year. Second — and this matters more — we are meaningfully higher than where the forecasters told us we'd be.

The forecast track record, which should end this debate on its own

If you're waiting for rates to drop, you are implicitly trusting a rate forecast. So let's look at how those forecasts have performed inside this single calendar year.

Fannie Mae publishes a monthly housing forecast. Here is what they've said about 2026, in 2026:

• January 2026 forecast: 30-year rate would average about 6% in 2026 and again in 2027.
• March 2026 forecast: rates would fall below 6% — 5.9% in Q2, 5.8% in Q3, 5.7% in Q4, and 5.6%–5.7% across 2027.
• May and June 2026 forecasts: revised up to roughly 6.3%–6.4%.
• July 2026 forecast: 6.4% through year-end, 6.3% for most of 2027.
• August 2026 forecast: 6.7% in Q3 and 6.8% in Q4 2026, 6.8% through the first half of 2027 — for a full-year average of about 6.5% in 2026 and 6.7% in 2027.

That is a swing of more than a full percentage point in eight months, from the single most sophisticated housing forecasting shop in the country, about a year that was already underway. The March version and the August version are not the same forecast with a tweak. They're opposite calls.

The other major forecasters aren't more optimistic. The Mortgage Bankers Association has projected the 30-year averaging around 6.5% through 2026, 2027, and 2028. Wells Fargo's August outlook puts it at roughly 6.55% in Q3 2026, easing to about 6.3% through 2027. A Reuters poll of property specialists this summer found mid-6% rates aren't expected to fall meaningfully any time soon.

Most of the revisions this year got blamed on the same things: the war with Iran, energy prices, and stickier-than-expected inflation. Which is exactly the point. Rate forecasts are conditional on geopolitics and inflation, and nobody forecasts those well either.

"Wait for rates to drop" is not a plan. It's a bet on a forecast that has been wrong by a full point this year alone.

The actual Charleston math

Let's use real numbers instead of slogans.

I'm going to work from the Charleston Trident Association of Realtors regional data. Their most recent regional report showed a median sales price of about $433,000, days on market at 51, months of supply at 3.4, inventory up 3% to 5,342 homes, and pending sales up 21.1%. CTAR's 2025 year-end number was $426,947, up 2.4% over 2024.

A note on price figures, because this trips people up constantly: you will see wildly different "Charleston median prices" depending on the source. Redfin and Houzeo have recently shown City of Charleston medians in the $622,000–$625,000 range. Zillow's typical-home-value index for the City of Charleston has run around $581,000. CTAR's tri-county figure sits in the $420,000s to $450,000s. These are not contradictions — they're different geographies and different property mixes. The City of Charleston number includes the peninsula and high-end waterfront. The tri-county number includes Summerville, Goose Creek, and North Charleston. Q1 2026 CTAR data even showed a median of $457,968, up 7.8%, reflecting a different month's mix of what actually closed. Verify which dataset any number came from before you make a decision on it. I wrote a full breakdown of this in my article on whether Charleston home prices are dropping.

Working from a $433,000 purchase with 20% down — a $346,400 loan:

The difference is about $147 a month, or roughly $1,764 a year.

Now let's actually price the waiting.

Say you wait twelve months and rates do fall to 6.0%. But Charleston prices also appreciate at the 2.4% pace CTAR recorded in 2025. That $433,000 house is now $443,392. Your 20% down payment goes up by about $2,078. Your loan is now $354,714. At 6.0%, your payment is roughly $2,127.

So you did save — about $97 a month versus buying today. But:

• You paid $10,392 more for the same house.
• You put down $2,078 more in cash.
• At $97 a month, it takes almost 22 months just to recover the extra down payment. You never recover the higher purchase price except through equity you'd have been building anyway.
• And you paid twelve months of rent. Average Charleston apartment rent, per RentCafe's August 2026 figure, is about $2,137. That's roughly $25,644 with no principal paydown.

Against that, in your first year of ownership at 6.65% you'd have paid down roughly $3,761 in principal. I want to be honest that this is a modest number — year one is overwhelmingly interest. It's real, but it's not the windfall agents imply.

The point isn't that buying today is automatically better. The point is that the rate is one of the smallest variables in that comparison. Price appreciation and rent are both larger. And unlike the rate, neither of them can be refinanced away later.

The counter-argument, stated fairly

Here's where I think the Buffett-refinance framing gets oversold, and I'd rather you hear it from me than find out later.

Refinancing is not free. Closing costs on a refinance typically run 2% to 6% of the loan amount, though ClosingCorp data has put the base national average closer to 0.72% of the loan when you strip out prepaids. On a $346,400 loan, that's a range from a couple thousand dollars up to $20,000 depending on how it's structured. There are low-cost and no-cost refinance structures, but "no cost" usually means the fee is buried in a slightly higher rate. Run the break-even: total refinance cost divided by monthly savings equals the number of months before you're ahead.

Refinancing requires that you qualify. Your income, credit, and appraised value all have to still work at the time you want to refinance. If you've changed jobs, taken on debt, or the appraisal comes in low, the option Buffett describes may not be exercisable when you want it.

The refinance window may not come. Every major forecaster currently expects the 30-year to stay above 6% through at least 2027, and Fannie Mae's August revision pushed that further out. If you buy at 6.65% and rates never go below 6%, you own the 6.65% loan. Plan on that being the outcome, and treat a refinance as upside.

The lock-in effect is real, and it cuts both ways. Roughly three-quarters of mortgaged American homeowners currently hold a rate below 6%. One survey this year found 51% of homeowners say they won't sell until rates fall below 5%, and 20% are holding out for sub-3%. CNBC reported that of the roughly 39 million homeowners entering 2025 with a rate below 5%, only about 6% gave that rate up during the year. That's why inventory has been constrained — and if rates do drop meaningfully, a wave of both buyers and sellers enters at once. Cheaper money does not reliably mean a cheaper house.

Four Charleston-specific factors the national advice ignores

If you're weighing this in the Lowcountry specifically, the rate is genuinely not your biggest line item.

1. Insurance is the variable that actually moves Charleston budgets. Coastal wind, hurricane deductibles, and flood coverage can swing your monthly payment far more than 65 basis points of interest. I've written separately on Charleston homeowners insurance cost trends and on flood insurance and flood zones, and I'd tell any buyer to price insurance on the specific address before falling in love with a rate. A quote in Mount Pleasant near the water and a quote in Summerville are not in the same universe.

2. Charleston's demand isn't primarily rate-driven. The metro is adding roughly 32 to 42 new residents a day. Those people are arriving for Joint Base Charleston, for Boeing in North Charleston, for the Volvo plant in Ridgeville, for the Port, for MUSC, and for retirement. Military relocations run on orders, not on Freddie Mac's weekly survey. The National Association of Realtors named Charleston a Top 10 Housing Hot Spot for 2026 on exactly this logic.

3. You currently have negotiating leverage you may not have later. Days on market around 51, months of supply around 3.4, and inventory up — that's a market where buyers can ask for repairs, keep an inspection contingency, and negotiate. If rates drop a full point and demand surges, that leverage evaporates before the payment savings show up. A slightly higher rate on a home you negotiated well can beat a lower rate on a home you had to fight three other buyers for.

4. The ownership premium in Charleston is currently wide. One Q2 2026 analysis pegged the monthly cost of owning a median-priced Charleston home — using $500,000, 20% down, 6.5%, plus taxes and insurance — at roughly $2,927, against a median three-bedroom rent of $2,276. That's a gap of about $651 a month in favor of renting. Another analysis put the income needed to comfortably own here at $111,283 versus $77,132 to rent. If that gap describes your situation, waiting may genuinely be the right call — not because of rates, but because of the total cost.

So — should you wait?

Here's my honest answer, and it isn't one-size-fits-all.

Buy now if:

• You plan to stay in the Charleston area five-plus years. Buffett's own framing is explicitly conditional on staying put for a considerable period.
• The payment at today's rate — including realistic Charleston insurance and taxes, not a Zillow estimate — fits your budget without straining it.
• You have reserves after closing. Not just the down payment and closing costs, but a cushion.
• You've found a home that works. The house matters more than the rate, and in a 51-day market you may be able to negotiate on it.

Wait if:

• You're stretching. If the payment only works at 6.0%, you cannot afford the house at 6.65%, and hoping for a refinance is not a budget.
• You might leave Charleston in under three to five years. Transaction costs on both ends will likely swamp any appreciation.
• Your down payment or reserves aren't there yet. Waiting to save is a real strategy. Waiting for a forecast is not.
• Your credit or income situation is about to improve materially. That will move your rate more than the market will.

Notice that three of those four "wait" reasons have nothing to do with interest rates. That's the actual insight.

The bottom line

Buffett's argument isn't "buy now, rates will drop." It's that the 30-year fixed mortgage is structurally lopsided in the borrower's favor, so the rate is the least permanent term in the whole transaction. Price is permanent. Location is permanent. Insurance exposure is permanent. Whether the house fits your life is permanent. The rate is the one number that has an escape hatch built into it.

But the other half of Buffett's position — the half the slogan drops — is that none of that makes it smart to buy more house than you can carry. Both halves are the argument. Anyone giving you only one of them isn't giving you advice.

If you want to run these numbers against a specific property, a specific neighborhood, and a real insurance quote instead of a national average, I'm glad to do that with you. That's a thirty-minute conversation, and it's a lot more useful than another rate forecast.

Article written by:
Dustin Guthrie, Realtor
(843) 697-7757
[email protected]