Rostered Day Off (RDO) Accumulator Calculator
Calculate how many RDO hours you accumulate over time, your total RDO balance, estimated rostered days off earned, and your progress toward the next RDO.
What Is an RDO Accumulator Calculator?
An RDO accumulator calculator helps you estimate how many rostered day off hours you earn over time and how those accumulated hours convert into full rostered days off.
RDO arrangements are commonly used when an employee works more hours during each week than their ordinary weekly hours, with the additional time accumulating toward a future paid day off.
This calculator lets you calculate your weekly RDO accrual, total accumulated balance, full RDO days available, remaining hours and progress toward your next rostered day off.
How to Use the RDO Accumulator Calculator
Start by choosing how you want to calculate your RDO accrual.
You can calculate it from the difference between your paid working hours and ordinary weekly hours, or you can enter a custom number of RDO hours accrued each week.
Then enter:
- The number of weeks you want to calculate
- Your weekly hours, if applicable
- The number of hours required for one RDO
- Any RDO hours you already have accumulated
- Any RDO hours that have already been used
Click Calculate RDO to see your current balance and estimated RDO accumulation.
RDO Accrual Formula
When an employee works more paid hours than their ordinary weekly hours, the difference can be used as the RDO accrual amount if that is how the employee's workplace arrangement operates.
The calculator then multiplies the weekly accrual by the number of weeks.
Any existing balance is added and RDO hours already used are deducted.
40 Hour Week With 38 Ordinary Hours Example
A common example is an employee who is paid for or works 40 hours each week while their ordinary working week is 38 hours.
Over four weeks:
If one rostered day off requires 7.6 hours, an eight-hour accumulated balance is enough for one full RDO with some hours remaining.
RDO Accumulation Example
| Paid Hours Per Week | 40 hours |
|---|---|
| Ordinary Hours Per Week | 38 hours |
| RDO Accrued Per Week | 2 hours |
| Calculation Period | 4 weeks |
| RDO Hours Accumulated | 8 hours |
| Hours Required for One RDO | 7.6 hours |
| Full RDOs Available | 1 RDO |
| Hours Remaining | 0.4 hours |
What Does RDO Mean?
RDO stands for Rostered Day Off. It generally refers to a scheduled day away from work that forms part of an employee's roster or working-hours arrangement.
Under some working arrangements, employees accumulate small amounts of time during their normal work weeks and later use those accumulated hours for a full rostered day off.
The exact method used to earn and take RDOs varies between workplaces.
How Do RDO Hours Accumulate?
One way RDOs can accumulate is when an employee works a slightly longer schedule each week than their ordinary hours.
For example:
Ordinary Week = 38 hours
Weekly RDO Accrual = 2 hours
Those two hours can accumulate each week until the employee has enough hours for a full rostered day off.
How Many Hours Are Needed for One RDO?
The number of hours required for one RDO depends on the employee's normal working day and workplace arrangement.
For example, if ordinary weekly hours are 38 hours across five working days:
In that example, one full RDO may represent 7.6 hours.
Other employees may use 7.5 hours, 8 hours or another value. For this reason, the calculator allows you to enter your own RDO day length.
How Long Does It Take to Accumulate an RDO?
You can estimate how many weeks are required to earn one RDO by dividing the hours required for an RDO by your weekly accrual.
For example, if you accumulate two hours per week and need 7.6 hours for one RDO:
This means you would accumulate the equivalent of one 7.6-hour RDO in approximately 3.8 weeks, assuming the same accrual continues.
How Many RDOs Can You Accumulate in a Year?
The calculator also estimates annual RDO accumulation by multiplying your weekly accrual by 52 weeks and dividing the result by the number of hours required for one RDO.
This is only a mathematical estimate. Holidays, leave, unpaid absences, roster changes or workplace rules may affect actual RDO accrual.
RDO Balance vs RDO Days
Your RDO balance is usually easiest to track in hours. Those hours can then be converted into full rostered days off.
For example, if you have accumulated 18 hours and one RDO requires 7.6 hours:
The calculator separates complete RDO days from the remaining balance so you can see exactly how far you are toward the next day off.
What Is RDO Accrual Progress?
After converting your accumulated balance into complete RDO days, there may still be some hours left over.
The calculator compares those remaining hours with the number of hours required for another RDO and displays a percentage showing your progress toward the next rostered day off.
For example, if one RDO requires eight hours and you have four unused accumulated hours:
You are therefore halfway toward another full RDO.
RDO vs Annual Leave
A rostered day off and annual leave are not necessarily the same thing. An RDO generally forms part of a work-hours or roster arrangement, whereas annual leave is a separate type of leave entitlement.
How RDOs are recorded, accumulated and taken depends on the employee's workplace arrangements.
RDO vs TOIL
RDO and time off in lieu, often called TOIL, can also operate differently.
An RDO may be built into an employee's normal roster through regular accrual, while TOIL often relates to additional hours worked that are later exchanged for time away from work.
Your employer's payroll or rostering policy should determine which arrangement applies.
Can I Enter an Existing RDO Balance?
Yes. If you already have accumulated RDO hours, enter them in the Existing RDO Balance field.
The calculator adds your new accrual to that balance before deducting any RDO hours you have already used.
Can I Use a Custom RDO Accrual Rate?
Yes. Select Custom RDO Hours Per Week from the accrual method menu.
This is useful when your employer already tells you exactly how many RDO hours you accrue each week and you do not need to calculate the accrual from weekly working hours.
Frequently Asked Questions
How do I calculate my RDO accrual?
If your arrangement accrues the difference between paid weekly hours and ordinary weekly hours, subtract ordinary hours from paid hours and multiply the result by the number of weeks.
How many RDO hours do I earn each week?
It depends on your workplace arrangement. For example, if you work or are paid for 40 hours while 38 are ordinary hours, the difference is two hours per week.
How many hours is one RDO?
It depends on your ordinary workday. If you work 38 ordinary hours over five days, an average workday is 7.6 hours. Other arrangements may use a different number of hours.
How long does it take to accumulate one RDO?
Divide the number of hours required for one RDO by the number of RDO hours accumulated per week. For example, 7.6 hours divided by two hours per week equals approximately 3.8 weeks.
Can I add my existing RDO balance?
Yes. Enter your current accumulated balance and the calculator will add new RDO hours earned during the selected period.
Can I deduct RDO hours already taken?
Yes. Enter any RDO hours already used and they will be deducted from the total accumulated balance.
Can I use a custom weekly RDO accrual?
Yes. Select the custom accrual method and enter the number of RDO hours you accumulate each week.
Does this calculator determine my legal RDO entitlement?
No. It performs mathematical accrual calculations based on the figures you enter. Your actual entitlement depends on your employment contract, award, enterprise agreement or workplace rules.