---
title: "21:21 Roster Pay Calculator – 3 Weeks On 3 Off Salary"
url: https://paybyroster.com/21-21-roster-pay
description: "Calculate your 21:21 roster salary. Estimate annual income and take-home pay for three weeks on, three weeks off — an even-time offshore and remote mining roster."
lang: en
---

# 21:21 Roster Salary Calculator – Three Weeks On, Three Off

The 21:21 roster — three weeks on, three weeks off — is a premium even-time roster used in offshore oil & gas platforms and ultra-remote mining operations. With three full weeks off between swings, workers have extended time for travel, family, or pursuing other interests. This roster commands premium hourly rates and is considered one of the most desirable long-swing patterns in the Australian resources sector.

## What Is a 21:21 Roster?

A 21:21 roster means you work 21 consecutive days on site followed by 21 days off. The 42-day cycle repeats approximately 8.7 times per year, giving you around 183 working days with 12-hour shifts. The equal time split means you spend exactly half the year at home. Three-week breaks allow for international travel, extended family time, or even running a side business. This roster is most commonly found in offshore operations in the Browse Basin, Carnarvon Basin, and on remote platforms where extended rotations are standard.

## Industries That Use the 21:21 Roster

Offshore Oil & Gas

Remote Mining

Common locations: Offshore, Remote WA, NT

## Pros & Cons of the 21:21 Roster

### Advantages

Equal time on/off

Three week breaks

Great for travel

### Disadvantages

Three weeks away is tough

Less common

Adjustment challenges

## Working Days Per Year on a 21:21 Roster

183

Working days/year

182

Days off/year

8.7

Cycles per year

## Example Salary Estimates – 21:21 Roster

Based on 12-hour shifts and 183 working days per year. Figures are gross annual income before tax, super, and allowances.

| Hourly Rate | Est. Annual Gross Income |
| --- | --- |
| $54/hr | $118,584 |
| $62/hr | $136,152 |
| $70/hr | $153,720 |
| $78/hr | $171,288 |

* Estimates only. Actual pay may vary based on penalty rates, allowances, overtime, and employer agreements. Use the calculator below for a detailed breakdown including Australian tax rates.

## Calculate Your Exact 21:21 Roster Pay

Get a detailed breakdown of your take-home pay including Australian tax, superannuation, allowances, and penalty rates.

## Who Is the 21:21 Roster Best For?

- Travel enthusiasts
- Singles
- Experienced FIFO

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