The cheapest storage prices you see advertised in Twin Falls are usually the first month, not the price you keep paying. A rate that looks like a great deal for thirty days can be a middling deal over a year once it resets. This is not a trick that is hidden from you. The regular rate is often printed right next to the promotional one, with a line through it. But when you are scanning headlines it is easy to remember the big number and forget which one you will actually be paying in February. Here is how the math actually works, with real Twin Falls numbers.
Do storage unit prices go up after the first month?
Often, yes. Many Twin Falls facilities advertise a discounted move-in rate, sometimes a dollar for the first month, that steps up to a standard rate afterward. That is a legitimate and common offer. The catch is only that the headline price and the price you pay for the next eleven months are two different numbers, and the gap can be large.
Take a size where I could verify both the promotional rate and the regular rate from the facility's own listing on September 22, 2026. A Storage Star 5x10 advertises at $37 for the move-in month, then bills $62 a month after that. Rent it for a year and your twelve payments are one at $37 and eleven at $62, which averages $59.92 a month. The number you shopped on was $37. The number you live with is close to $62.
What a reset costs over a year
Here are the pairs I could verify on both ends, alongside our two units, which carry no move-in promotion and do not reset.
Promotional and regular rates read from each published rate card and listing on September 22, 2026. Year-one average is one move-in month plus eleven months at the regular rate, divided by twelve. Not every facility publishes both numbers, and reset schedules differ, so confirm the ongoing rate before you sign anything.
The pattern in that table is consistent. The move-in rate steps up roughly two thirds once the promotion ends. A $37 headline becomes a $60 reality. Our numbers do not move: an 8x20 is $110 in month one and $110 in month twelve, and the 12x30 is $210 either way. We are not always the cheapest headline in town, and this article is not a claim that we are. It is a claim that our headline and our ongoing rate are the same number, which makes us easy to compare over a full year rather than a first month.
How to compare storage prices honestly
Three habits protect you. First, find the regular rate, not just the move-in rate. It is usually on the same page, sometimes struck through, sometimes a click away in the rental flow. Second, do the year-one math: one month at the promo plus eleven at the regular, divided by twelve. That is your real monthly cost. Third, check for the extras that do not show in the headline, an administrative fee at move-in, a required insurance or protection plan, a lock you have to buy. A cheap first month with a mandatory protection plan and an admin fee can cost more in month one than a flat rate with a refundable deposit.
What we do instead
We publish one rate per unit and we bill that rate every month. There is no move-in teaser that resets, no administrative fee, and no required protection plan. The deposit is refundable. That is not automatically the cheapest way to store, and if you only need a unit for a month or two, a promotional first month somewhere else may genuinely beat us. Over a year, a flat rate is easier to trust and usually easier to budget. If that is the trade you want, see our storage units page and the full price per square foot comparison.