Castle Biosciences (CSTL) Tax Rate (2018 - 2024)
Castle Biosciences' Tax Rate came in at -21.89% for Q2 2026, down 3308.61 percentage points from 3286.71% a year earlier and down 21.14 percentage points from the prior quarter.
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Analysis
Castle Biosciences (CSTL) Tax Rate (2018 - 2024) Analysis & Trends
Over the trailing twelve months to Jun 30, 2026, Castle Biosciences reported Tax Rate of -1.10%, down 9.06 percentage points year-over-year; for FY2025, it was 18.15%, up 2.76 percentage points from FY2024.
- Tax Rate carries a five-year change of +18.97 percentage points (FY2020 to FY2025).
- Going back by year, Tax Rate was 15.39% in FY2024 (+15.57 pp), -0.18% in FY2023 (-2.74 pp), 2.56% in FY2022 (-19.23 pp) and 21.79% in FY2021 (+22.62 pp).
- The five-year range for quarterly Tax Rate is -29.79% (Q3 2025) to 3286.71% (Q2 2025).
- Year-over-year, Tax Rate increased in four of the last eight quarters, with an average year-over-year change of -2.68 percentage points.
- The fastest year-over-year change in Tax Rate over five years came in Q2 2025 (a gain of 3299.83 percentage points), and the weakest in Q2 2026 (a drop of 3308.61 percentage points).
- Business Quant data shows CSTL's Tax Rate at -0.76% (Q1 2026), 14.08% (Q4 2025) and -29.79% (Q3 2025) in the three quarters before Q2 2026.
Peer Set
Peer Comparison
| # | Company | Market Cap | Enterprise Value | Gross Profit (Qtr) | Tax Rate (Qtr) |
|---|---|---|---|---|---|
| 1 | HCA Healthcare | 101.22 Bn | 97.23 Bn | - | 22.61% |
| 2 | Natera | 59.29 Bn | 54.98 Bn | 485.19 Mn | - |
| 3 | Quest Diagnostics | 26.56 Bn | 24.69 Bn | 1.03 Bn | 21.36% |
| 4 | Labcorp Holdings | 26.41 Bn | 24.16 Bn | 1.11 Bn | 22.59% |
| 5 | Tenet Healthcare | 22.49 Bn | 11.49 Bn | - | 22.01% |
| 6 | Guardant Health | 22.12 Bn | 18.19 Bn | 219.03 Mn | - |
| 7 | BrightSpring Health Services | 12.91 Bn | 11.24 Bn | 492.75 Mn | 7.39% |
| 8 | Fresenius Medical Care AG | 12.56 Bn | 4.51 Bn | 1.52 Bn | 23.45% |
| 9 | Tempus AI | 12.17 Bn | 9.20 Bn | 246.50 Mn | 3.51% |
| 10 | Castle Biosciences | 1.05 Bn | -67.48 Mn | 79.85 Mn | - |
Historic Data
Download Data
Historic Data
| Date | Value |
|---|---|
| Sep 30, 2024 | 72.60% |
| Dec 31, 2019 | 3.39% |
| Dec 31, 2018 | 0.23% |
API Access
Castle Biosciences Tax Rate API
Pull this series into your own models, spreadsheets and apps with the Business Quant
Historical Metrics API. The request below matches the chart above — change the
frequency, period or values and it follows. Swap YOUR_API_KEY for your own key.
https://data.businessquant.com/historic?slug=tax-rate&ticker=CSTL&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "tax-rate", "ticker": "CSTL", "period": "max", "api_key": "YOUR_API_KEY"}
data = requests.get(url, params=params).json()const res = await fetch("https://data.businessquant.com/historic?slug=tax-rate&ticker=CSTL&period=max&api_key=YOUR_API_KEY");
const data = await res.json();