When Will Mortgage Rates Fall?

Forecasters now see 6.7-6.8% into 2027 - and raised those numbers in August. The math of waiting vs buying now: payment parity needs a rate below about 5.9%.

Written by Jonathan Nyst Updated August 2026 3 min read Rates & timing Every figure re-runnable

Nobody knows — and the people paid to know just moved their answer in the wrong direction. As of August 2026, the 30-year fixed sits at 6.66% (Freddie Mac’s weekly survey, August 27), and the major forecasters project it staying near that level through 2027: Fannie Mae’s August forecast says 6.8% for late 2026 and most of 2027, and the Mortgage Bankers Association says 6.7% — a forecast the MBA raised from 6.5% just one month earlier. Our model can’t predict rates either. What it can do is price the bet you’re actually making by waiting — and at 3% price growth, waiting two years only beats buying now if you land a rate below about 5.9%.

What do the forecasters actually predict?

The two most-cited houses, as of their August 2026 vintages: Fannie Mae projects the 30-year at 6.7% in Q3 2026, 6.8% in Q4, 6.8% through the first half of 2027, and 6.7% in the second half. The MBA projects 6.6% in Q3 2026, then 6.7% through the end of 2027. In July, the MBA’s number for that whole stretch was 6.5% — a two-tenths upward revision in a single month.

That revision is the real lesson. Rate forecasts are honest guesses that move with every inflation print, and the same institutions have repeatedly pushed “rates come down next year” one year further out. Treat any confident date you read — including a Fed meeting — as a guess. The Fed doesn’t set mortgage rates anyway; mortgage rates and the Fed walks through what actually moves them, and what the remaining 2026 FOMC meetings can and can’t change.

What does waiting for lower rates actually cost?

Waiting is a bet that rates fall faster than prices rise. Price the bet instead of vibing it. At our model’s default 3% appreciation, here’s the same $420,000 home bought now versus bought later at the rates optimists hope for, 20% down each time:

Each row assumes a rate drop larger than any forecaster currently projects, and still saves only $50–150 a month while demanding thousands more down. The break-even is precise: after two years of 3% price growth, the waiting buyer needs a rate below about 5.9% just to match today’s $2,124 payment — against a professional consensus of 6.7–6.8%. After one year, the bar is about 6.2%. And a fixed rate is a one-way bet: buy at 6.5% and a genuine rate collapse is still yours via refinancing, while waiting gives you no claim on today’s price.

Is renting while you wait throwing money away?

No — and this is where our model departs from the pressure you’ll read elsewhere. At August 2026 rates, renting isn’t the price of indecision; it’s the winning column. In the default scenario — $2,100 rent against that $420,000 home at 6.5% — renting and investing the difference ends about $67,000 ahead over ten years. Buying only beats renting at this rate when comparable rent exceeds about $2,468 a month. If your rent is below the tipping point for your numbers, waiting costs you nothing in net-worth terms, however long rates take.

The tipping rent moves with the rate, which is the honest way to think about “when rates drop”: at 6% it’s about $2,350 and renting’s margin narrows to about $46,000; at 5.5% it’s about $2,233 and the margin is about $24,000 — a near coin flip; at 4% the default scenario flips to buying outright. Rather than forecasting when that happens, know your threshold in advance — the full rate ladder has every rung.

So what should you actually do?

Stop asking when rates fall and ask which side of the tipping rent you’re on — that question has an answer today. If your comparable rent is below the tipping rent for your price and rate quote, rent, invest the difference, and let the waiting cost you nothing; re-run the numbers when the survey average genuinely moves. If you’re above it — or an affordable-market ratio puts you there — buying already wins at today’s rates and waiting is the speculative move, since the break-even math rewards time in the house. And if the deal only pencils at a rate nobody projects before 2028, the spreadsheet is telling you the answer: it doesn’t pencil.

Run your own numbers

Pre-compute your decision at three rates instead of forecasting one: run your scenario at today’s 6.5%, then half a point lower, then a full point lower, with your own price and rent swapped in. If the verdict matches in all three, rates were never your variable. Every figure here is computed by the open-source engine documented on the methodology page — including the tipping rents, which are the only rate forecast this site will ever publish.

Jonathan Nyst

Jonathan Nyst built RentVsBuyMath as an independent project — for himself first. He spent fifteen years marketing financial products, in banking, fintech and payments at CMO level, which is exactly how he knows what a lead-generation calculator looks like from the inside. This is the calculator without the funnel: he is not a lender, broker or agent, the site takes no referral fees, and nobody is paid more if you decide to buy. The whole model is public — every formula documented on the methodology page, the engine MIT-licensed, covered by automated tests including scenarios computed by hand to check it.