Castellum, Inc. (CTM) Tax Rate (2025)
Castellum's Tax Rate came in at -3.73% for Q2 2026, down 22.78 percentage points from 19.04% a year earlier and down 1.80 percentage points from the prior quarter.
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Castellum, Inc. (CTM) Tax Rate (2025) Analysis & Trends
Over the trailing twelve months to Jun 30, 2026, Castellum reported Tax Rate of -12.46%, down 15.76 percentage points year-over-year; for FY2025, it came in at -9.50%, down 8.81 percentage points from FY2024.
- Tax Rate carries a five-year change of -37.57 percentage points (FY2020 to FY2025).
- Going back by year, Tax Rate was -0.69% in FY2024 (-7.28 pp), 6.60% in FY2023 (+12.41 pp), -5.82% in FY2022 (-31.86 pp) and 26.04% in FY2021 (-2.03 pp).
- The five-year range for quarterly Tax Rate is -23.32% (Q2 2022) to 64.54% (Q4 2021).
- Year-over-year, Tax Rate increased in four of the last eight quarters, with an average year-over-year change of +1.57 percentage points.
- The fastest year-over-year change in Tax Rate over five years came in Q2 2025 (a gain of 26.03 percentage points), and the weakest in Q4 2022 (a drop of 63.10 percentage points).
- Business Quant data shows CTM's Tax Rate at -1.94% (Q1 2026), -8.43% (Q4 2025) and 20.44% (Q3 2025) in the three quarters before Q2 2026.
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Castellum, Inc. 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=CTM&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "tax-rate", "ticker": "CTM", "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=CTM&period=max&api_key=YOUR_API_KEY");
const data = await res.json();