Months of inventory is the single most useful number for understanding whether you are in a buyer's market or a seller's market. It measures how long it would take to sell every home currently for sale at the current pace of sales. Under four months favors sellers, over six months favors buyers, and the range between is roughly balanced.
How is months of inventory calculated?
Months of inventory divides the number of active listings by the number of homes selling per month. If a Scottsdale submarket has 600 active listings and 150 homes are selling each month, that is four months of inventory.
The number matters more than the raw count of listings. A market can add inventory and still favor sellers if buyer demand rises at the same time. Watching listing counts alone will mislead you.
What does a low-inventory market mean for sellers?
Under four months of inventory, sellers hold the leverage. Well-prepared homes priced correctly tend to draw competing offers, and terms like inspection periods and closing dates become negotiable in the seller's favor.
Low inventory does not mean any price works. Overpricing in a fast market still produces the same result it produces in a slow one, which is a stale listing and a price reduction. Buyers in every market compare your home against its competition.
What does a high-inventory market mean for buyers?
Above six months of inventory, buyers gain room to negotiate. Expect more willingness on price, on repairs after inspection, and on seller contributions toward closing costs or an interest rate buydown.
The tradeoff is that high-inventory markets often coincide with higher borrowing costs, which is part of why inventory rose in the first place. The monthly payment matters more than the purchase price, and the two do not always move together.
Does inventory work the same across the Valley?
No. The Valley is not one market. Paradise Valley and the guard-gated communities of North Scottsdale routinely carry more months of inventory than Mesa or Chandler, because the buyer pool at higher price points is smaller.
Across our own closed sales, the median days on market runs 24 in Mesa, 36 in Phoenix, 40 in Scottsdale and 65 in Paradise Valley. Those differences are structural, not seasonal. A home that would be considered slow-moving in Mesa may be selling normally in Paradise Valley.
How should this change what you do?
If you are selling, ask what months of inventory looks like in your specific price band and submarket, not citywide. The citywide number can point the opposite direction from your street.
If you are buying, use inventory to calibrate your offer strategy rather than your decision to buy at all. Inventory tells you how much competition you face on a given property. It does not tell you whether the right home is available now.
