Self Storage Cost Calculator (2026)

An illustrative model of how the charges on a storage tenancy stack up over time: rent, monthly cover, a one-off admin charge and lock, and a rate review a few months in. Its starting rents and fees are editorial assumptions held in this page's code, not measured prices, so the output shows the shape of a bill rather than what you will pay. Use it to see which charges to ask about, then get real quotes.

Your Storage Details

State (editorial assumption, not data)

Unit Size

Storage Duration: 6 months

1 month24 months

Climate control (model adds a flat 30%)

Illustrative model output

Not a price or a quote. Arithmetic on editorial assumptions, shown to illustrate how charges stack.

Model starting rent

$95/mo

Model average monthly cost, all charges

$123/mo

Model total for 6 months (illustrative)

$739

Model assumptions

Starting rent (assumed)$95

Monthly cover (assumed)$15

Admin charge, one-time (assumed)$25

Lock, one-time (assumed)$12

Rate review from month 4 (assumed)+15%

Rate review in the model: this model assumes a 15% rise from month 4, so its rent goes from $95/mo to $109/mo. That is an assumption, not an observed average. Ask any facility when its first review is likely and how much notice you get.

How the model works

Base pricing

A per-state 10x10 figure held in this page's own code. It is an editorial estimate. It is not a survey result and it is not drawn from any published dataset.

Size adjustment

The state figure is scaled by a fixed multiplier per unit size. The multipliers are our own, chosen to reflect the fact that larger units cost less per square foot.

Climate premium

A flat 30% is added when climate control is selected. That percentage is an assumption of ours, not a measured national markup.

Rate increases

A 15% rise is modelled at month 4. That is a modelling assumption too, not an observed average across operators.

Read this before you use the output

No free primary source publishes US self-storage rates by state and unit size, so this calculator does not draw on one. The state figures, size multipliers, fee amounts and rate-review assumption are hand-set values in this page's code, and everything it prints is arithmetic on them. Treat the output as a worked illustration of how the charges stack up, not as a price, and get real quotes before you commit to anything.

The price figures on this site that a reader can check at source are the BLS producer price index and the Public Storage 10-K figures, both set out on the home page with their limits.

Frequently Asked Questions

How accurate is this calculator?+

Not in the sense of predicting your quote: it is an illustrative model. The per-state figures it starts from are editorial assumptions held in this page's own code rather than a measurement, so there is nothing to compare the output against. Prices between two facilities in the same city differ by more than most people expect, which is the reason no national figure can be accurate for you. Use this to understand which charges stack on top of rent, then get actual quotes.

Where do the numbers come from?+

From this page's own code. They are editorial assumptions, not data: no free primary source publishes US self-storage rates by state and unit size. The figures on this site that can be checked at source are the BLS producer price index for self-storage operators and the operators' own SEC filings, both set out on the home page.

Should I still get quotes from facilities?+

Yes, and treat the quotes as the answer rather than as a check on this page. This calculator cannot tell you whether a facility is overcharging, because the figures it starts from are our own estimate rather than a measurement of the market. What it is genuinely useful for is the shape of the bill: seeing which charges land on top of rent and when, so you know what to ask each facility about. Ring three sites in the same week and compare them on the month-two rate.

Why does the full cost differ from the advertised rate?+

The advertised rate only covers rent. Most tenancies add cover on the goods each month (often required unless your own policy covers off-premises storage), a one-off admin charge, a lock, and a rate review once the introductory period ends. The amounts vary by operator and site. This model puts assumed values on each so you can see how they stack; ask each facility for its real figures.