To score the PSS-10, reverse the four positively worded items (4, 5, 7 and 8, so 0 becomes 4 and 4 becomes 0), then add all 10 items for a total of 0 to 40. Higher scores mean more perceived stress. The scale's author says there are no official cut-offs: interpret a score against normative data, not a severity band.
The Perceived Stress Scale (PSS) measures how unpredictable, uncontrollable and overloaded a person has found their life during the past month. It was developed by Sheldon Cohen and colleagues in 1983, and the 10-item version is the one most practices use. This guide covers scoring, the cut-off question, norms, and how to record a result in your notes.
How do you score the PSS-10?
Each item asks "In the last month, how often have you..." and is rated on a five-point scale: 0 (never), 1 (almost never), 2 (sometimes), 3 (fairly often) and 4 (very often). The full item wording is on Cohen's laboratory website.
According to the lab's scoring instructions:
- Reverse items 4, 5, 7 and 8. These are the positively stated items (feeling confident about handling problems, things going your way, controlling irritations, being on top of things). Recode 0 to 4, 1 to 3, 2 stays 2, 3 to 1 and 4 to 0.
- Add all 10 items, using the reversed values for items 4, 5, 7 and 8.
- Report the total out of 40. There are no subscales in the published scoring and no weighting.
The lab's scoring notes do not give a rule for missing items, so if a client skips one, record the total as incomplete rather than estimating it.
What happens if you forget to reverse score?
This is the most common PSS-10 scoring error, and it can change the result substantially. Take a client who answers:
- Items 1, 2, 3, 6, 9 and 10: 3 each (fairly often).
- Item 7 (controlling irritations): 1.
- Items 4, 5 and 8 (confident, things going your way, on top of things): 0.
Scored correctly, items 4, 5 and 8 become 4 each and item 7 becomes 3. The total is 18 + 12 + 3 = 33.
Summed without reversing, the same answers give 18 + 0 + 1 = 19.
A client who never feels confident or on top of things is under more stress, not less, which is why the reversal matters. Automated scoring removes this error, but if you hand-score from a paper form, check the four reversed items first.
What is a high score on the PSS-10?
The honest answer is that the PSS-10 has no validated high, moderate or low thresholds. The lab's frequently asked questions are direct about it: the PSS is not a diagnostic instrument, so there are no cut-offs, only comparisons with other people.
You will often see bands of 0 to 13 (low), 14 to 26 (moderate) and 27 to 40 (high) on worksheets and wellbeing websites. Those bands do not appear in Cohen's published papers. If your service uses them, name them as a local convention in your notes, not as a clinical standard.
What is a normal PSS-10 score?
The most useful comparison data come from Cohen and Janicki-Deverts (2012), who reported PSS-10 scores from three US probability samples (1983, 2006 and 2009). In the 2009 sample of 2,000 adults:
- Men averaged 15.52 (SD 7.44) and women 16.14 (SD 7.56).
- Adults aged 25 to 34 averaged 17.46 (SD 7.31); adults aged 65 and older averaged 11.09 (SD 6.77).
- Unemployed adults averaged 16.62 (SD 6.97); retired adults averaged 12.34 (SD 7.63).
Across all three surveys, stress was higher in women than men and rose as age, education and income fell. Internal reliability (Cronbach's alpha) was .78 in 1983 and .91 in both later samples.
Using those figures, the client above scoring 33 sits a little over two standard deviations above the 2009 mean for their sex. That is a meaningful elevation worth exploring, and a more defensible statement than "high stress" from an unofficial band.
Keep two limits in mind. These are US norms, and the authors themselves describe the 1983 data as dated. And a normative comparison describes where a score sits in a population, not whether the person has a disorder.
Is there Australian normative data for the PSS?
Not for the PSS-10 in a form you can use as a reference table. The largest Australian study, Ribeiro Santiago and colleagues (2020), tested the 14-item version in 3,857 adults from Australia's National Survey of Adult Oral Health 2004 to 2006. Using Rasch analysis, they rejected a single total score: the scale split into a Perceived Stress subscale and a Perceived Control subscale, and four items showed differential item functioning (they behaved differently across groups).
For day-to-day practice, the takeaway is modest. Treat the PSS-10 total as a useful summary, and look at the pattern of item responses when the total alone does not fit the clinical picture. A client can reach a moderate total through high distress with intact coping, or low distress with very little sense of control, and those call for different conversations.
How should you interpret a change in PSS-10 score?
Because there is no agreed minimal important difference for the PSS-10, read change in context rather than against a fixed number:
- Use the same version every time. PSS-10 and PSS-14 totals are not interchangeable, and the psychometric review by Lee (2012) found the 10-item version performed better than the 14-item and 4-item versions.
- Respect the one-month recall period. The lab notes it has no psychometric data for longer recall periods and expects accuracy to fall as the period lengthens. Administering roughly monthly suits the wording; weekly administration means each response overlaps heavily with the last.
- Look at the items that moved. A fall driven by items 4, 5, 7 and 8 (coping and control) tells you something different from a fall driven by items 1, 3 and 10 (upset, nervousness, difficulties piling up).
- Pair it with a symptom measure. The PSS-10 measures appraisal of stress, not depression or anxiety. Practices often administer it alongside the K10 or the DASS-21, whose stress subscale captures tension and irritability rather than perceived control.
Who is the PSS-10 suitable for?
The lab states that the PSS was designed for community samples with at least a junior high school education, and that its items are deliberately general rather than specific to any group. Two cautions follow:
- Children. The lab's FAQ says its own team has not used the PSS with children and has not received publications on paediatric use. If you use it with adolescents, say so in your notes and interpret cautiously.
- Translations. Non-English versions are the work of other researchers, and the lab does not guarantee their accuracy or psychometrics.
Is the PSS-10 free to use?
Cohen's lab publishes the English scale on its website and now directs permission requests to Mapi Research Trust's ePROVIDE platform, where submitting a request is free. The lab's FAQ also states that use in profit-making ventures requires special permission and a nominal charge. If you run a private practice, check the current terms through ePROVIDE rather than assuming the scale is free for every use.
How should you record PSS-10 results in clinical notes?
Record enough that a colleague could understand the result without the form:
- The version (PSS-10), the date and the one-month recall period.
- The total out of 40, and a note that items 4, 5, 7 and 8 were reverse scored.
- The comparison you used, by name (for example, "2009 US norms, women: mean 16.14").
- Any notable item pattern, the change since the last administration, and a one-line interpretation tied to the formulation.
Our guide to writing a psychological assessment report covers presenting standardised scores formally. PractaLuma is AI-native practice management software for Australian mental-health practices. Its standardised assessments feature scores the PSS-10 automatically, including the reverse-scored items, and drops the result into the clinical note with change over time alongside it. See all features and pricing.
Frequently asked questions
What is the score range of the PSS-10?
0 to 40. Each of the 10 items is scored 0 to 4 after the four positively worded items are reversed.
Which PSS-10 items are reverse scored?
Items 4, 5, 7 and 8. On the PSS-14 the reversed items are 4, 5, 6, 7, 9, 10 and 13, and on the PSS-4 they are items 2 and 3.
Can the PSS-10 diagnose stress or burnout?
No. It measures how stressful a person perceives their life to be over the past month. It is not a diagnostic instrument and does not assess burnout, which needs a dedicated measure.
Is the PSS-10 the same as the DASS-21 stress scale?
No. The DASS-21 stress subscale measures symptoms such as tension and difficulty relaxing. The PSS-10 measures appraisal: how unpredictable, uncontrollable and overloaded life has felt. For a broader wellbeing view, the WHO-5 is a short complement.
This article is general information for health practitioners and does not replace clinical judgement, supervision or the published scoring guidance for each instrument.