Casual Nurse Pool: How to Build One That Actually Fills Shifts
Key takeaways
A casual nurse pool is a group of directly employed casual nurses who cover open shifts across wards or sites before agency staff do.
The gap between a paper pool (names on a list) and a ready pool (credentialed, available, rested, and reachable) decides your fill rate.
Where the Nurses Award 2020 applies, pool shifts carry a 25% casual loading and a two-hour minimum engagement. Check your enterprise agreement or state award first.
Fill order matters: core roster first, then the pool, then overtime, then agency.
It's 2 p.m. and the registered nurse (RN) rostered for tonight's 9:30 p.m. night shift on the surgical ward has just called in sick. You've got 40 names on the casual pool list and a ward that needs someone signed off for intravenous (IV) cannulation. By 4 p.m., the nurse unit manager (NUM) phone tree has produced eight voicemails, two "can't tonight" texts, and a call to the nursing agency.
A casual nurse pool is a group of casual nurses you employ directly. They pick up open shifts across wards or sites before you go to an agency. It only fills shifts when those nurses are ready: credentialed, oriented, available, rested, and reachable at short notice.
That's the gap between a paper pool and a ready pool. A paper pool is a list of names. A ready pool is the smaller group on that list who can take tonight's shift, and this guide shows you how to build it.
What a casual nurse pool is (and what it isn't)
A casual nurse pool is your own bench of casual RNs, enrolled nurses (ENs), and sometimes assistants in nursing (AINs). You employ them, credential them, and orient them, and they cover gaps across units or sites when the core roster can't.
In this guide, pool nurses don't have a fixed home ward. They float to wherever tonight's gap is, so readiness for each ward matters as much as registration.
The names vary. Your service might call it a casual pool, a nurse bank, a float pool, or a resource pool.
At Austin Health, the casual nurse bank is a casual model, and the service says, "At Austin Health we are committed to our casual nurse bank." Western Sydney Local Health District says its Nurse Bank offers permanent work for registered nurses and midwives. The same term can mean different things from one employer to the next, including permanent relief staff, so check what it means in your own policies.
Whatever you call it, the list itself is only the paper pool. The ready pool is whoever on that list could walk onto the ward tonight. Here's how the three main ways to fill a gap compare:
Casual nurse pool | Permanent float or relief pool | Nursing agency | |
|---|---|---|---|
Who employs them | You, on a casual basis | You, on a full-time or part-time basis | The agency |
Loading | Casual loading in place of leave | No casual loading, paid leave applies | You pay the agency's charge rate |
Orientation to your wards | You control it | You control it | Check what orientation each agency nurse has had |
Continuity | Offer to the same nurses so familiarity can build | Roster them in advance so you know who's coming | Ask for nurses who've worked with you before |
Cost visibility | Check the cost before you confirm | Include it in your planned roster cost | Confirm the charge rate before you book |
Why a casual nurse pool stays on paper
A pool with 40 names can still leave you calling an agency at 4 p.m. The problem sits in the gap between the list and the people who can work tonight.
Here are four failure points to check in your own pool:
Stale credentials: Australian Health Practitioner Regulation Agency (AHPRA) registration, competencies, or vaccination records have lapsed, and nobody noticed until the offer went out.
No ward orientation: The nurse is registered and willing, but they've never worked in your surgical ward and you can't put them in charge.
Availability in someone's head: The only record of who's free on Thursdays lives in one NUM's notebook or memory.
Phone-tree offers: Calls go down the list in the same order, so the first people rung aren't always right for the shift.
The supply picture makes this harder. In its March 2024 Nursing Supply and Demand Study, the Department of Health and Aged Care says "The baseline projections across all sectors show an undersupply of 70,707 FTE by 2035." That's a baseline projection of full-time equivalent (FTE) roles if nothing changes. Every ready nurse you already employ counts.
Ratios and care minutes raise the stakes
In some settings, an unfilled shift is more than a busy night. It can drop a ward or home below a staffing requirement.
In NSW, minimum ratios apply to specific public hospital wards under a phased rollout. The NSW Government's NSW Safe Staffing Levels rollout announcement states, "A minimum of one nurse to four patients will apply during morning and afternoon shifts across the participating wards." If your ward is one of them, a 2 p.m. sick call becomes a ratio problem by 9:30 p.m.
Residential aged care works on care minutes instead of ratios. The mandatory care minutes requirements are based on "a sector-wide average of 215 minutes of care per resident per day, including 44 minutes of direct RN care". Each home gets its own target, so an empty RN shift can eat into the minutes you're tracking. For the skill-mix side, see our guide to building an aged care roster.
How to build a ready pool, step by step
You don't need more names to fill more shifts. These five steps turn the names you've already got into a ready pool.
1. Set the fill order before the sick call
Write down your fill order and share it with every NUM and after-hours manager. When the 2 p.m. call comes, nobody should be guessing.
A simple ladder looks like this:
Core roster first: Swaps, part-time staff who want extra hours, and changes within the ward
Casual nurse pool next: Offer to ready pool nurses before anyone else
Overtime after that: Only once the pool can't cover it
Agency as a final option: Once everything else is exhausted, though your order may vary
You're not alone on this order. The Australian Nursing and Midwifery Federation's ANMF casual employment position says "Health services should always source staff from their bank or pool before sourcing staff from agencies." That's a union position. Victorian public health rostering guidance also treats overtime as a late resort: the Victorian Rostering Toolkit says "Allocating staff overtime shifts should be the last option once all other processes to fill vacant shifts are exhausted." The toolkit doesn't address agency, so you can decide where agency sits relative to overtime for your service.
2. Track readiness, not just names
A casual pool registered nurse is only useful tonight if you know they're cleared for the ward. Keep a readiness record for every pool member and check it before an offer goes out.
Readiness item | What to record | What it tells you at 2 p.m. |
|---|---|---|
AHPRA registration | Registration number and expiry date | Whether they can work at all |
Ward orientation | Which wards or sites they've completed orientation for | Where you can safely place them |
Competencies | Skills such as IV cannulation, medication administration, or mental health | Whether they match tonight's patient load |
Vaccination screening | Status and expiry against your policy | Whether they're cleared for the area |
Last shift worked | Date of their most recent pool shift | Whether they're still current with your ward |
Availability submitted | Dates and shifts they've said they can work | Whether it's worth contacting them |
Tag each skill so offers only reach nurses who hold it. In Deputy Rostering, you can record qualifications with expiry dates and set them as requirements for an area. Then you can see who's qualified before you offer the shift. For more on this, read about matching credentials to clinical shifts.
3. Collect availability ahead of time
Ask pool nurses to submit availability by a set date each roster cycle. Then you're working from a real list at 2 p.m.
Set a deadline: Pick a cut-off date before each new roster is published.
Set a minimum expectation: Decide what minimum availability you expect from pool nurses, such as a set number of shifts a month, and put it in writing.
Make updates easy: Let nurses change availability as their week shifts.
Keep availability where nurses can update it themselves. With the Deputy App, pool nurses can enter availability and see open shift offers on their phone.
4. Offer open shifts to qualified nurses first
Publish the open shift with the role, ward, times, and notes, such as "IV cannulation required." Then offer it only to qualified, available nurses. Nurse rostering software can replace the phone tree here, because every float pool nurse who qualifies sees the offer at once.
Pick the claim model that fits the gap:
First claim: The first qualified nurse to accept gets the shift. Use this for urgent gaps like tonight's 9:30 p.m. start.
Approval: Nurses request the shift and you choose. Use this when skill mix or seniority matters on the ward.
Weekly cap: Limit pick-ups per person per week so hours spread across the pool.
For a worked example, see our guide to publishing open shifts to qualified staff.
5. Check rest, hours, and cost before you confirm
A claimed shift still needs a manager's check. Before you confirm a pick-up, look at three things:
Rest break: A late that ends at 9:30 p.m. followed by a 7 a.m. early leaves only nine and a half hours off.
Weekly hours: Check whether this shift tips them into overtime.
Shift cost: See the cost of the shift, including loadings, before it's worked.
Watch for "hero rosters," where the same willing nurses pick up shift after shift. They can look like a fix on paper while building up fatigue risk. Read more about roster patterns that drive fatigue. Overtime and agency spend can also hide in manual rosters, which is the hidden cost of manual rostering.
