As of Aug 21, 2026, PSX's PEG ratio of 0.03 reflects its valuation relative to its growth rate. This result reflects a P/E ratio of 13.82 measured against EPS growth of 483.7%.
PSX PEG ratio history
Phillips 66's nine years historical PEG ratio averages out to 0.45. Compared to historical data, PSX's 0.03 PEG ratio represents a decrease of 93%. PSX hit its maximum PEG ratio of 5.87 during the Sep 2017 quarter over the last nine years. The Sep 2022 quarter marked the lowest reading at 0, indicating the most attractive growth-adjusted valuation.
Phillips 66 PEG ratio by year
| Year | PEG ratio | PE ratio | Growth YoY |
|---|---|---|---|
| 2025 | 0.1 | 11.93 | 116% |
| 2024 | N/A | 22.74 | -67.8% |
| 2023 | N/A | 8.56 | -33.4% |
| 2022 | 0.01 | 4.46 | 686.5% |
| 2021 | 0.18 | 24.4 | 132.8% |
| 2020 | N/A | N/A | -233.2% |
| 2019 | N/A | 16.38 | -42.7% |
| 2018 | 0.36 | 7.26 | 19.9% |
| 2017 | 0.04 | 10.22 | 236.7% |
| 2016 | N/A | 29.39 | -62.2% |
| 2015 | N/A | 10.51 | -7.4% |
| 2014 | 0.22 | 8.54 | 38.4% |
| 2013 | N/A | 12.71 | -7.3% |
| 2012 | N/A | 8.11 | -13.9% |
| 2011 | N/A | N/A | 550.4% |
Phillips 66 PEG ratio by quarter (TTM)
| Year | PEG ratio | PE ratio | Growth YoY |
|---|---|---|---|
| Jun 2026 | 0.02 | 9.62 | 483.7% |
| Mar 2026 | 0.2 | 20.38 | 101.4% |
| Dec 2025 | 0.1 | 11.93 | 116% |
| Sep 2025 | N/A | 54.19 | -68.1% |
| Jun 2025 | N/A | 39.63 | -74.4% |
| Mar 2025 | N/A | 27.81 | -66.1% |
| Dec 2024 | N/A | 22.74 | -67.8% |
| Sep 2024 | N/A | 16.72 | -52.8% |
| Jun 2024 | N/A | 12 | -49.1% |
| Mar 2024 | N/A | 12.47 | -49.5% |
| Dec 2023 | N/A | 8.56 | -33.4% |
| Sep 2023 | N/A | 7.22 | -24% |
| Jun 2023 | 0.04 | 4.13 | 98.6% |
| Mar 2023 | 0.01 | 3.91 | 351.1% |
| Dec 2022 | 0.01 | 4.46 | 686.5% |
PSX average PEG ratio chart
Measured against past performance, PSX's PEG ratio comes in under the 5 and 10-year averages.
PEG comparison
With a PEG of 0.03, PSX ranks lower than the Energy sector, the industry and its peers average. In comparison with the Energy sector average of 0.4, Phillips 66's PEG is 93% lower.
PSX EPS growth
PSX Price vs fair value
PSX PEG vs peers
Relative to its peers, PSX's PEG ratio is below XOM's and CVX's yet above VLO's. Phillips 66's PEG ratio of 0.03 is below the peer average of 0.67.
Frequently asked questions
What is Phillips 66's PEG ratio?
PSX has a PEG ratio of 0.03, per Aug 21, 2026 data.
What is the 5-year average PEG ratio for Phillips 66 (PSX)?
PSX shows a 5-year average PEG ratio of 0.07.
What is the highest PEG ratio for PSX?
The Sep 2017 quarter marked the nine years high at 5.87 for PSX's PEG ratio.
How does the current PEG ratio for PSX compare to its historical average?
At present, PSX's PEG ratio runs 93% lower than its 9-year historical average.
Why is Phillips 66's PEG ratio so low?
The 0.03 PEG ratio for PSX reflects robust earnings growth outpacing the current valuation.
How is PSX's PEG ratio calculated (Phillips 66 PEG ratio formula)?
To calculate the PEG ratio, take the company's PE ratio and divide by its EPS growth rate (YoY TTM). As of Aug 21, 2026, Phillips 66 carries a PE ratio of 13.82. Earnings grew at 483.7% over the TTM period ending Jun 2026. Applying the formula, this yields a PEG ratio of 0.03. PEG RATIO(0.03) = PE RATIO(13.82) / EPS GROWTH(483.7%)
All PEG ratio stats are based on quarterly TTM periods, unless otherwise specified.