When is it cheaper to rent a CAT 315 Compact Excavator by the week than by the day?

From day 5. 5 days at the $370 day rate would be $1,850, but the weekly rate caps it at $1,575.

When is it cheaper to rent a CAT 315 Compact Excavator on the 28-day rate?

From day 18. At that point the week-and-day composition reaches the $4,300 28-day rate, and the price stops climbing for the rest of the cycle.

Break-even duration

Equipment rents on three rates — a day rate, a week rate and a 28-day rate — and the cheapest one changes as the job runs long. This finds the two days where it changes, on a real listing’s real published rates.

CAT 315 Compact Excavator

See the listing →

Brian Hendricskon · Excavators - Mini

Day: $370
Week: $1,575
28 days: $4,300

Daily stops winning on

day 5

5 days at the day rate would be $1,850. On the week rate it is $1,575.

Weekly stops winning on

day 18

18 days at the day rate would be $6,660. On the 28-day rate it is $4,300.

The working

Whole weeks bill at the week rate; the leftover days bill at the day rate but never add up to more than one extra week; and a whole 28-day cycle never costs more than the 28-day rate. That is the rule, applied one day at a time.

Rental price by duration for CAT 315 Compact Excavator, days 1 to 35
Days	At the day rate	On the ladder	Difference	Rate in play
1	$370	$370	—	day
2	$740	$740	—	day
3	$1,110	$1,110	—	day
4	$1,480	$1,480	—	day
5	$1,850	$1,575	you save $275	week
6	$2,220	$1,575	you save $645	week
7	$2,590	$1,575	you save $1,015	week
8	$2,960	$1,945	you save $1,015	week
9	$3,330	$2,315	you save $1,015	week
10	$3,700	$2,685	you save $1,015	week
11	$4,070	$3,055	you save $1,015	week
12	$4,440	$3,150	you save $1,290	week
13	$4,810	$3,150	you save $1,660	week
14	$5,180	$3,150	you save $2,030	week
15	$5,550	$3,520	you save $2,030	week
16	$5,920	$3,890	you save $2,030	week
17	$6,290	$4,260	you save $2,030	week
18	$6,660	$4,300	you save $2,360	28-day
19	$7,030	$4,300	you save $2,730	28-day
20	$7,400	$4,300	you save $3,100	28-day
21	$7,770	$4,300	you save $3,470	28-day
22	$8,140	$4,300	you save $3,840	28-day
23	$8,510	$4,300	you save $4,210	28-day
24	$8,880	$4,300	you save $4,580	28-day
25	$9,250	$4,300	you save $4,950	28-day
26	$9,620	$4,300	you save $5,320	28-day
27	$9,990	$4,300	you save $5,690	28-day
28	$10,360	$4,300	you save $6,060	28-day
29	$10,730	$4,670	you save $6,060	day
30	$11,100	$5,040	you save $6,060	day
31	$11,470	$5,410	you save $6,060	day
32	$11,840	$5,780	you save $6,060	day
33	$12,210	$5,875	you save $6,335	week
34	$12,580	$5,875	you save $6,705	week
35	$12,950	$5,875	you save $7,075	week

Rental rates only. Protection and the marketplace service fee are added on top — see the checkout figure below.

What checkout will quote you

Rental · 18 days: $4,300
Rental protection (RPP): $645
Service fee: $430
Estimated total: $5,375

Pick a listing

The numbers come from one operator’s published rates, so the tool needs to know whose.

Where these numbers come from

The rates are the operator’s own, read live from their listing. The arithmetic is the same best-price billing engine that produces 2Quip invoices — not a second copy written for this page — run on the industry-standard terms: a 28-day cycle, whole weeks at the week rate, leftover days at the day rate capped at one more week.

An operator can agree different terms on an individual rental, and a long rental bills per 28-day cycle rather than in one lump. So treat this as what the rate card says, and the operator’s quote as what you are agreeing to.