# Rental extension calculator

> What does it cost to keep a dumpster longer? Work out the cost of running past your included days, and compare it against returning the container and ordering…

Source: https://dumptergod.shop/calculators/rental-extension-calculator/
Last reviewed: 2026-08-17

# Rental extension calculator

Work out the cost of running past your included days, and compare it against returning the container and ordering a second one later.

Extra days neededPer-day rate ($)A second rental would cost ($)

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This calculator needs JavaScript. The reference table below covers the same ground.

Direct answer
What does it cost to keep a dumpster longer? extension cost = extra days × per-day rate. Compare against a second rental: base rental + delivery, which is usually cheaper past roughly two to four weeks of extension. Work out the cost of running past your included days, and compare it against returning the container and ordering a second one later.

## The formula

extension cost = extra days × per-day rate. Compare against a second rental: base rental + delivery, which is usually cheaper past roughly two to four weeks of extension.

## Worked example

At $12 a day, three extra weeks is $252 — more than the delivery charge on a fresh container in most markets. If your job has stalled, sending the box back is often the cheaper move.

## Assumptions
- There is no standard included period. Haulers range from three days to open-ended, so the included days input is the one you must get from your own contract
- Some haulers cap total rental duration regardless of payment, and a street permit almost always has its own expiry

## Reference table

| Extra days | @ $5 | @ $12 | @ $30 |
| --- | --- | --- | --- |
| 3 | $15 | $36 | $90 |
| 7 | $35 | $84 | $210 |
| 14 | $70 | $168 | $420 |
| 21 | $105 | $252 | $630 |
| 30 | $150 | $360 | $900 |

## Related questions
- Dumpster size calculator
- Debris weight calculator
- Dumpster cost calculator
- Cubic yards calculator
- Sizes
- Costs

Reviewed by [R. Tiwari](https://dumptergod.shop/authors/r-tiwari/) Last reviewed: 2026-08-17