Your CMS Five-Star staffing rating is built from six measures, all computed from the payroll-based staffing data you already report to Medicare — two on registered nurse and total nurse hours, one on weekend coverage, and three on turnover. Roughly a third of the score isn’t about hours at all. It’s about whether the same people came back.
That’s the part most staffing plans miss. Administrators tend to treat the staffing star as a volume problem — add hours, move the number. It doesn’t work that way, and the arithmetic underneath explains why.
Before the arithmetic, a quick orientation — this system runs on acronyms that tend to get used as though everyone already knows them.
First, the basics: what the Five-Star rating actually is
The Centers for Medicare & Medicaid Services (CMS) publishes a star rating for every certified nursing home on Care Compare, the public site families use to choose a facility. It runs one to five stars, and it’s built from three separate domains:
- Health inspections — findings from your state survey cycle, weighted toward recent surveys.
- Staffing — how much nursing coverage you provide and how stable it is. This is the domain this article is about.
- Quality measures — clinical outcomes drawn from MDS assessments and Medicare claims.
Each domain gets its own star, and those three produce a fourth: the overall rating. A few terms you’ll see throughout:
- PBJ (Payroll-Based Journal) — the staffing data every certified nursing home submits to CMS quarterly, showing hours worked by role. It’s the sole source for the staffing domain.
- HPRD (hours per resident day) — nursing hours divided by resident census. It’s how staffing is measured, so a facility with a higher census needs more hours to hold the same number.
- Case-mix adjusted — your HPRD compared against what CMS expects given how sick your residents actually are, rather than against a flat national target. Heavier acuity raises the bar you’re measured against.
Why does the star rating actually matter?
Because it decides who sends you residents. Care Compare is the public tool families use, but the higher-stakes readers are institutional: hospital discharge planners choosing where to send a patient, and health plans deciding who’s in network. A low rating costs you referrals long before it costs you anything else.
Concretely, the rating shows up in four places:
- Hospital referrals. Discharge planners under readmission pressure steer toward higher-rated facilities. Fewer referrals is usually the first symptom — referral conversion tends to soften 30 to 60 days before census actually drops, which means the rating hits your admissions log before it hits your P&L.
- Network inclusion. Higher-rated buildings are the ones added to narrow networks and named preferred post-acute partners. Several Medicaid managed care plans won’t contract with facilities below three stars at all.
- Bundled payment arrangements. To use the waiver of the three-day hospital stay requirement, the majority of SNF partners in the arrangement must hold a rating of at least three stars. Falling below it can remove you from a partnership you’re already in.
- Families and staff. It’s the first thing prospective residents’ families see — and increasingly what clinicians check before taking a job.
The practical line is three stars. The rating behaves less like a gradient and more like a gate: the difference between four and five stars is a marketing advantage, but the difference between two and three can be network participation. That’s what makes the staffing rules worth understanding in detail. As the next sections show, a one-star staffing rating carries a penalty that pulls your overall rating down a full star on its own — and if that drops you from three to two, you’re not losing prestige, you’re losing contracts.
How is the CMS Five-Star rating calculated?
Every nursing home gets four ratings: an overall star, plus separate stars for health inspections, staffing, and quality measures. The overall rating isn’t an average of the three. It starts at the health inspection rating and gets adjusted up or down from there:
| Step | Adjustment | When it applies |
|---|---|---|
| Start here | BASE | Your health inspection rating — the whole calculation begins from this number |
| Staffing bonus | +1 star | Staffing rating is five stars — four is not enough |
| Staffing penalty | −1 star | Staffing is 1 star — no conditions, no exceptions |
| Quality measures | +1 / −1 | Quality measures are 5 stars (+1) or 1 star (−1) |
| Limits | CAP | Result can’t exceed 5 or fall below 1. If health inspections are 1 star, staffing and quality measures together can lift the overall by no more than one star. |
Read the second and third rows together and you have the whole strategic point of this article: you have to reach the very top of the scale to earn a star, and only fall to the bottom to lose one.
Why does the staffing star matter more than it looks?
Because it’s asymmetric. A one-star staffing rating always costs you a star on the overall rating. But strong staffing only earns you one if it reaches five stars — the very top of the scale. Four stars earns nothing.
Read that again, because it’s the practical bit: you have to be exceptional to gain a star, and only below average to lose one. A building that climbs from three-star staffing to four-star staffing has done real work that residents and staff will feel — and moved its overall rating not at all.
The corollary is that the cheapest star available to most buildings is the one they’re currently losing. Climbing from one star to two in staffing is worth a full point on the overall rating. Climbing from three to four is worth nothing at all.
What the asymmetry looks like in practice
Two facilities, same amount of staffing effort, very different outcomes on the public rating:
| Facility A | Facility B | |
|---|---|---|
| Health inspections | 2 stars | 4 stars |
| Staffing — before | 1 star | 3 stars |
| Overall — before | 1 star (2 − 1 for 1-star staffing) | 4 stars (no staffing adjustment) |
| Both facilities run the same improvement plan and gain one staffing star. | ||
| Staffing — after | 2 stars | 4 stars |
| Overall — after | 2 stars (penalty removed) | 4 stars (bonus needs 5 stars, not 4) |
| Net change | +1 overall star | No change |
Facility A removed a penalty. Facility B did equivalent work and moved nothing on the public rating, because the staffing bonus only pays at five stars — four earns exactly as much as three.
That isn’t an argument for Facility B to stop improving staffing; residents and staff feel the difference regardless, and turnover costs money whether or not it shows on Care Compare. But if you’re deciding where the next dollar goes and the overall rating is the goal, the arithmetic tells you plainly: closing a one-star staffing gap is the highest-yield move on the board, and nothing between two and four stars moves the overall rating at all.
Facility B’s leverage is elsewhere: drive staffing all the way to five stars, move quality measures to five, or improve health inspections. Half-measures in the staffing domain won’t show up.
What are the six staffing measures?
Each measure earns points, the points are totaled, and the total maps to a staffing star. Here’s the whole scoring sheet:
| Measure | What it captures | Max points |
|---|---|---|
| Case-mix adjusted RN hours per resident day | RN coverage, all days, adjusted for resident acuity | 100 |
| Case-mix adjusted total nurse hours per resident day | RN + LPN/LVN + aide coverage, all days | 100 |
| Case-mix adjusted total nurse hours per resident day, weekends | Whether coverage holds on Saturday and Sunday | 50 |
| Total nurse staffing turnover | % of nursing staff who left over 12 months | 50 |
| RN turnover | % of RNs who left over 12 months | 50 |
| Administrator turnover | Number of administrators who left over 12 months | 30 / 25 / 10 |
Administrator turnover is scored in bands rather than a curve: no departures earns 30 points, one departure earns 25, and more than one earns 10.
How much of the staffing score is about turnover rather than hours?
About a third. Of roughly 380 available points, the two hours-per-resident-day measures carry 200 and weekend coverage carries another 50 — but turnover and administrator stability account for 130.
That changes what a staffing strategy has to do. You cannot buy your way out of the turnover measures in a quarter. They look back twelve months, and they measure whether people stayed. A building that closes every gap with a different unfamiliar face can post respectable hours per resident day and still lose 130 points on stability.
It’s also why weekend coverage sits in its own line worth 50 points. CMS separated it out precisely because weekend staffing is where thin plans show up first — the hours that get quietly dropped when Friday’s schedule doesn’t fill.
Do agency and contract staff count in your turnover rate?
Yes — and most administrators don’t realize it. CMS is explicit: “both regular employees and agency staff are included in the turnover measure if they work sufficient hours to be eligible for the denominator.”
The eligibility rule is what makes this actionable. A clinician enters your turnover denominator once they work at least 120 hours in a 90-day window — roughly ten twelve-hour shifts. Below that, CMS treats them as occasional coverage and they never count at all. Above it, they’re counted like any employee: if they then go 90 consecutive days without working a single shift in your building, they’re recorded as turnover, dated to their last shift.
Two things follow, and both are counterintuitive. First, your best contract clinicians — the ones you rely on and want back — are precisely the ones who can hurt your turnover rate, because they’re the only ones who clear 120 hours. The occasional filler never enters the calculation. Second, someone who lapses past 90 days and later returns doesn’t only count once: CMS treats the return as a new employment spell that can turn over again. A churning contract pool can charge you for the same person twice.
The flip side is that this is one of the few staffing measures that is fully preventable. Get a lapsing clinician back into the building before day 90 and no turnover event is ever recorded. Continuity isn’t only better care — it’s the difference between a returning clinician and a separation on your public rating.
The mechanics matter enough that we broke them out in full — the 120-hour eligibility threshold, the 90-day clock, the employee-ID trap that can void the measure entirely, and what happens when someone lapses and comes back. See do agency staff count toward nursing home turnover?
Where does CMS get this data?
All six measures come from your Payroll-Based Journal submissions — the quarterly staffing data you already report. This is why PBJ accuracy isn’t a back-office concern: the file you submit is the staffing rating. There’s no separate survey, no self-reported supplement, no chance to explain a bad quarter.
Two things follow from that. First, hours you fail to capture — contract and per diem hours reconciled from invoices at quarter-end — are hours you don’t get credit for. Second, PBJ reports hours worked, not scheduled. A shift on the roster that nobody covers contributes nothing.
How long does a star rating last?
It isn’t permanent, and the three domains move at very different speeds.
Staffing is recalculated every quarter from your PBJ submission. PBJ is due 45 days after the quarter closes, and updated ratings typically post to Care Compare by the end of the following month — so roughly two and a half months separate the hours you work from the rating the public sees.
But within the staffing domain, the two halves move on different clocks, and this is the part worth planning around:
- The hours measures respond in a quarter. Fix your coverage and capture it correctly, and the next refresh reflects it. This is the fast lever.
- The turnover measures look back twelve months. A year of churn takes a year to work off, no matter what you do next quarter. This is the slow lever, and it’s why turnover work has to start before you need the result.
Health inspections move slower still — they’re driven by your survey cycle and weighted toward recent surveys, so a bad survey follows you for multiple cycles.
The planning implication is straightforward: if you need movement before an upcoming contract negotiation or referral review, the hours and weekend measures are the only levers that can move in time. Turnover is the one you should have started on a year ago — which is the argument for starting now.
What actually moves the staffing star?
Four levers, in rough order of how quickly they respond. None of them is easy, and it’s worth being honest about why — most of the advice written on this topic stops at “improve your staffing,” which is not advice.
1. Capture every hour you already staff
This is first because it’s the only lever where the work is already done and the credit is missing. It’s also the one people assume is trivial.
It isn’t. Employee hours flow out of a single payroll system and are usually clean. Contract and per diem hours arrive from several sources in different formats — an invoice here, a timesheet there, a spreadsheet from a staffing partner — and someone has to map each name to the right job code and pay type at quarter-end, on a deadline. Role mismatches are common: a provider working as an aide gets coded to the wrong category, or hours get attributed to the wrong day when a shift crosses midnight.
What actually helps: reconcile at the time of the shift rather than at quarter-end, agree a fixed job-code mapping with each staffing source in writing, and audit one closed quarter against the underlying invoices to find out what your real capture rate is. Most buildings that do this find hours they staffed and paid for but never got credit for.
2. Fix weekends as their own plan
Weekend coverage is a separate 50-point measure, aggregated across every weekend day in the quarter — so a couple of thin Saturdays don’t get averaged away by strong Tuesdays.
The reason it’s hard is structural, not motivational. Weekend coverage usually gets built as the remainder of the weekday schedule, staffed by the same people, who reasonably want weekends off. Differentials help and cost money; mandation works once and then costs you turnover points in the other half of the score.
What actually helps is treating the weekend as a distinct plan with its own coverage target and its own labor pool, rather than as leftover capacity. Per diem fits this better than most solutions, because weekend-only availability is genuinely attractive to clinicians who hold a weekday role elsewhere — you’re recruiting into the gap rather than asking your existing staff to absorb it.
3. Protect RN hours specifically
RN coverage carries its own 100-point measure and counts inside total nurse hours, so an unfilled RN hour costs you in two places at once. It’s the most expensive hour on your schedule to leave open.
It’s also the hardest to fill on short notice: the average time to recruit an experienced RN runs about 78 days (NSI, 2026), which means a vacancy is a quarter-long staffing problem, not a hiring problem you solve before the next submission. Practically, that makes RN gaps the clearest case for per diem coverage — not as a permanent staffing model, but because the alternative is leaving the double-weighted measure short for a full rating cycle.
There is also a cliff underneath this one. A facility reporting four or more days in a quarter with no RN hours at all, on days when residents were in the building, is assigned a one-star staffing rating outright — no matter how the other five measures scored. And a one-star staffing rating costs a star on the overall rating. Four uncovered days can undo a good quarter everywhere else.
4. Reduce churn — the slow, expensive one
Turnover and administrator stability are worth about 130 points, and there is no way to move them quickly. The measures look back twelve months. Whatever you do this quarter shows up a year from now.
It’s also the lever least responsive to scheduling tactics, because the drivers are compensation, predictability, workload, and whether people feel set up to do the job. What does help, and is within an administrator’s control: consistent assignment so staff and residents actually know each other, schedules published far enough ahead to plan a life around, and reducing mandation — which trades a covered shift today for a resignation next quarter.
The structural point is that how you fill gaps determines whether the turnover column erodes. Coverage that arrives as a rotating cast of unfamiliar faces keeps the hours column honest while quietly costing you on stability — and it makes the building harder to run, because every shift starts with orientation.
This is the case for continuity as an operational strategy rather than a nicety. On the facility side, Switch is built for it: providers return to buildings they already know, arrive fully credentialed and current, and shifts get worked at a 96% work rate — because accountability runs both ways, with the strictest cancellation policy in the category. Coverage that actually lands is coverage that shows up in your PBJ file, and therefore in your staffing star.
If turnover is the measure you’re losing, we built a CNA turnover cost calculator to put a number on what that churn costs your building, and The Hidden Cost of CNA Turnover breaks down where the money goes. For the wider staffing picture, see what the nurse shortage actually costs a facility in 2026.
Frequently asked questions
It starts with the health inspection rating, then adjusts. Add one star if the staffing rating is five stars; subtract one if it’s one star. Add or subtract one for a five-star or one-star quality measure rating. The result can’t exceed five or fall below one.
Only at the very top. Staffing lifts the overall rating by one star only if it reaches five stars — a four-star staffing rating earns nothing. A one-star staffing rating, by contrast, always costs you a star.
Yes. CMS states that both regular employees and agency staff are included in the turnover measure if they work enough hours to be eligible for the denominator — at least 120 hours in a 90-day window.
Ninety consecutive days with no hours worked at that nursing home. CMS raised the threshold from 60 to 90 days in July 2024 so that employees taking full FMLA parental leave are not counted as turnover.
Because it decides who sends you residents. Hospital discharge planners steer toward higher-rated facilities, narrow networks and preferred post-acute partnerships favor them, and several Medicaid managed care plans won’t contract with facilities below three stars at all.
Staffing is recalculated every quarter from your PBJ submission, and updated ratings typically post to Care Compare about two and a half months after the quarter closes. Health inspection ratings move more slowly, following your survey cycle.
The hours and weekend measures can improve in a single quarter, because they reflect the hours you worked and reported. The turnover measures look back twelve months, so stability improvements take about a year to fully show up.
Case-mix adjusted RN hours per resident day (100 points), case-mix adjusted total nurse hours per resident day (100), weekend total nurse hours per resident day (50), total nurse staffing turnover (50), RN turnover (50), and administrator turnover (30/25/10).
From your quarterly Payroll-Based Journal (PBJ) submissions. There’s no separate survey or self-reported supplement — the staffing file you submit is what the rating is calculated from.
Yes, substantially. Total nurse turnover, RN turnover, and administrator turnover together account for about 130 of roughly 380 available points — around a third of the staffing score, independent of how many hours you staffed.
Yes. Contract and per diem hours are reported in PBJ alongside employee hours and count toward the staffing measures. Hours you fail to capture accurately are hours you don’t get credit for.
The bottom line
The staffing star is not a volume score. It’s a score for hours, weekend coverage, and stability — computed entirely from data you already submit. Facilities that treat it as a reporting problem tend to find points they were already earning and not capturing. Facilities that treat it as a continuity problem tend to keep them.
See how Switch fills shifts with credentialed per diem providers — and what a 96% work rate does to the hours that reach your PBJ file.
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