Why your four-week rental cost more than a month

Equipment rents at a daily rate, a weekly rate, and a monthly rate, and the gap between them is large. A weekly rate is typically far below seven daily rates; a monthly rate is far below four weekly ones.

That structure is normal and reasonable. The problem is what happens at the boundaries, because the tier that applies is not always the one you would expect.

This catches people constantly. A month, in most rental agreements, means 28 days — or a calendar month, or 30 days, depending on whose paper you signed.

So a rental running 29 days might bill as a month plus a day, or as four weeks plus a day, and those are materially different numbers. Which one applies is a definition in the agreement, not a convention across the industry.

If you rent the same equipment for similar durations repeatedly, it is worth knowing exactly how your agreement defines a month. It changes what you should be quoted before the job starts.

If you rent something for four days and keep it for nine, you would expect it to reprice to the weekly rate. Often it does. Sometimes it does not, and you get nine daily rates instead — which can cost more than two full weeks.

Whether repricing is automatic depends on the provider's system and on your agreement. Some do it as a matter of course, some only on request, and some only if you call before the tier boundary.

This is worth checking on any rental that ran longer than planned, which in construction is most of them.

If you have a negotiated rate sheet or a national account, the rates on it should be what appears on the invoice. Frequently they are not, and the reason is usually mundane rather than sinister.

The branch quoted book rates because the account was not attached to the order.

The rate sheet was updated and the old one is still in the system.

The order was placed by a foreman on site rather than through the office, so the account never got referenced.

This is the easiest category to check and the easiest to get corrected, because it is a straightforward comparison: what the rate sheet says against what the invoice charged. No interpretation required.

Pick one piece of equipment from a recent invoice. Find the rate sheet or agreement that covers it. Compare four things: the rate charged, the rate agreed, the duration billed, and the tier applied.

If the rate matches and the tier is right, you are fine. If either is off, that is a question worth asking — and a specific one, which matters far more than a general complaint about pricing.