National Grid (NGG) Tax Rate (2009 - 2025)
National Grid (NGG) posted Tax Rate of 33.66% for Q3 2025, down 71.89% on a QoQ basis from 19.58% in Q3 2024, and down 1408.0% year-over-year from 2.57% in Q3 2024.
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Analysis
National Grid (NGG) Tax Rate (2009 - 2025) Analysis & Trends
National Grid has reported Tax Rate for 12 years, with the latest figure at 33.66% in Q3 2025.
- On a quarterly basis, Tax Rate fell 1408.0% year-over-year to 33.66% in Q3 2025; TTM through Sep 2025 was 9.19%, a 4757.0% increase from a year earlier, with the FY2026 full-year figure at 28.95%, up 7.0% from the prior year.
- Tax Rate was 33.66% for Q3 2025 at National Grid, down from 19.58% in the prior quarter.
- The five-year high for Tax Rate was 19.58% in Q3 2024, with the low at 54.13% in Q4 2022.
- Average Tax Rate over 4 years is 31.92%, with a median of 30.28% recorded in 2023.
- The sharpest annual moves came in 2024 and 2025: Tax Rate soared 927 bps in 2024, then slumped 1408 bps in 2025.
- Over 4 years, Tax Rate stood at 54.13% in 2022, then surged by 47 bps to 28.85% in 2023, then surged by 32 bps to 19.58% in 2024, then tumbled by 72 bps to 33.66% in 2025.
- The last three Tax Rate figures came in at 33.66% (Q3 2025), 19.58% (Q3 2024), and 31.7% (Q2 2024), per Business Quant data.
Peer Set
Peer Comparison
| # | Company | Market Cap | Enterprise Value | Gross Profit (Qtr) | Tax Rate (Qtr) |
|---|---|---|---|---|---|
| 1 | Enel Chile | 306.41 Bn | 306.41 Bn | 890.00 Mn | -25.06% |
| 2 | National Grid | 79.91 Bn | 76.14 Bn | - | - |
| 3 | Dominion Energy | 54.94 Bn | 58.84 Bn | 3.50 Bn | 16.49% |
| 4 | Xcel Energy | 44.99 Bn | 42.98 Bn | 3.12 Bn | -11.41% |
| 5 | Wec Energy | 33.53 Bn | 33.88 Bn | 1.45 Bn | 8.23% |
| 6 | Ameren | 28.13 Bn | 28.25 Bn | - | 14.13% |
| 7 | Fortis | 27.32 Bn | 28.61 Bn | 1.60 Bn | 14.18% |
| 8 | Firstenergy | 25.89 Bn | 27.19 Bn | 2.51 Bn | 20.72% |
| 9 | Hydro One | 21.93 Bn | 21.54 Bn | - | 15.58% |
| 10 | Edison International | 21.17 Bn | 20.93 Bn | 3.29 Bn | 16.89% |
Historic Data
Download Data
Historic Data
| Date | Value |
|---|---|
| Sep 30, 2025 | -33.66% |
| Sep 30, 2024 | -19.58% |
| May 23, 2024 | -31.70% |
| Sep 30, 2023 | -28.85% |
| May 18, 2023 | -23.63% |
| Dec 31, 2022 | -54.13% |
| Sep 30, 2017 | -26.02% |
| Sep 30, 2016 | 148.54% |
| Mar 31, 2016 | -24.43% |
| Dec 31, 2015 | -25.00% |
| Sep 30, 2015 | 136.20% |
| Sep 30, 2014 | 158.65% |
| Sep 30, 2013 | 149.43% |
| Sep 30, 2012 | 134.52% |
| Mar 31, 2012 | -669.23% |
| Dec 31, 2010 | -123.29% |
| Sep 30, 2009 | 121.72% |
API Access
National Grid 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=NGG&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "tax-rate", "ticker": "NGG", "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=NGG&period=max&api_key=YOUR_API_KEY");
const data = await res.json();