KOPPERS HOLDINGS INC. Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent
KOPPERS HOLDINGS INC. (KOP) reported Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent of -1.10% for the 6-month period ending 2026-06-30, per its 10-Q filed 2026-08-06.
Financial Statements › Expense Statement › Income Tax
us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpense · last filed 2026-08-06
- KOPPERS HOLDINGS INC. effective income tax rate reconciliation, nondeductible expense, percent for the quarter ending 2026-03-31 was 1.10%, a 50.00% decline year-over-year.
- KOPPERS HOLDINGS INC. effective income tax rate reconciliation, nondeductible expense, percent for the quarter ending 2025-03-31 was 2.20%, a 22.22% increase year-over-year.
- KOPPERS HOLDINGS INC. effective income tax rate reconciliation, nondeductible expense, percent for the quarter ending 2024-03-31 was 1.80%, a 28.57% increase year-over-year.
- KOPPERS HOLDINGS INC. effective income tax rate reconciliation, nondeductible expense, percent for the quarter ending 2023-03-31 was 1.40%, a 7.69% increase year-over-year.
| Period end | Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent 3 month | Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent 3 month as first filed | Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent 6 month | Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent 6 month as first filed | Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent 9 month | Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent 9 month as first filed |
|---|---|---|---|---|---|---|
| 2026-06-30 | -1.10% 10-Q · filed 2026-08-06 | |||||
| 2026-03-31 | 1.10% 10-Q · filed 2026-05-08 | |||||
| 2025-09-30 | 1.70% 10-Q · filed 2025-11-07 | |||||
| 2025-06-30 | 2.20% 10-Q · filed 2026-08-06 | |||||
| 2025-03-31 | 2.20% 10-Q · filed 2026-05-08 | |||||
| 2024-09-30 | 1.90% 10-Q · filed 2025-11-07 | |||||
| 2024-06-30 | 1.90% 10-Q · filed 2025-08-08 | |||||
| 2024-03-31 | 1.80% 10-Q · filed 2025-05-09 | |||||
| 2023-09-30 | 1.40% 10-Q · filed 2024-11-08 | |||||
| 2023-06-30 | 1.30% 10-Q · filed 2024-08-08 | |||||
| 2023-03-31 | 1.40% 10-Q · filed 2024-05-03 | |||||
| 2022-09-30 | 1.60% 10-Q · filed 2023-11-03 | |||||
| 2022-06-30 | 1.50% 10-Q · filed 2023-08-03 | |||||
| 2022-03-31 | 1.30% 10-Q · filed 2023-05-05 | |||||
| 2021-09-30 | 1.30% 10-Q · filed 2022-11-04 | |||||
| 2021-06-30 | 1.10% 10-Q · filed 2022-08-04 | |||||
| 2021-03-31 | 1.10% 10-Q · filed 2022-05-06 | |||||
| 2020-09-30 | 1.30% 10-Q · filed 2021-11-04 | |||||
| 2020-06-30 | 1.50% 10-Q · filed 2021-08-06 | |||||
| 2020-03-31 | 2.30% 10-Q · filed 2021-05-07 | |||||
| 2019-09-30 | 1.70% 10-Q · filed 2020-11-04 | 1.60% 10-Q · filed 2019-11-07 | ||||
| 2019-06-30 | 1.60% 10-Q · filed 2020-08-05 | 1.30% 10-Q · filed 2019-08-08 | ||||
| 2019-03-31 | 1.40% 10-Q · filed 2020-05-07 | 1.20% 10-Q · filed 2019-05-03 | ||||
| 2018-09-30 | 2.60% 10-Q · filed 2019-11-07 | |||||
| 2018-06-30 | 1.80% 10-Q · filed 2019-08-08 | |||||
| 2018-03-31 | 0.00% 10-Q · filed 2019-05-03 | |||||
| 2017-09-30 | 1.60% 10-Q · filed 2018-11-08 | |||||
| 2017-06-30 | 2.10% 10-Q · filed 2018-08-09 | |||||
| 2017-03-31 | 0.80% 10-Q · filed 2017-05-08 | |||||
| 2016-09-30 | 1.20% 10-Q · filed 2017-11-09 | |||||
| 2016-06-30 | 0.90% 10-Q · filed 2017-08-03 | |||||
| 2016-03-31 | 0.90% 10-Q · filed 2017-05-08 | |||||
| 2015-09-30 | 1.70% 10-Q · filed 2015-11-05 | 1.40% 10-Q · filed 2016-11-03 | ||||
| 2015-06-30 | 1.10% 10-Q · filed 2015-08-06 | 1.10% 10-Q · filed 2016-08-04 | ||||
| 2015-03-31 | 1.10% 10-Q · filed 2016-05-06 | |||||
| 2014-09-30 | 11.00% 10-Q · filed 2015-11-05 | 6.70% 10-Q · filed 2015-11-05 | ||||
| 2014-06-30 | 1.00% 10-Q · filed 2015-08-06 | 1.00% 10-Q · filed 2015-08-06 | ||||
| 2014-03-31 | 1.10% 10-Q · filed 2015-05-08 | 1.80% 10-Q · filed 2014-05-07 | ||||
| 2013-09-30 | 0.50% 10-Q · filed 2014-11-10 | 0.50% 10-Q · filed 2014-11-10 | ||||
| 2013-06-30 | 0.50% 10-Q · filed 2014-08-07 | 0.60% 10-Q · filed 2014-08-07 | ||||
| 2013-03-31 | 0.60% 10-Q · filed 2014-05-07 | |||||
| 2012-09-30 | 0.40% 10-Q · filed 2013-11-07 | 0.70% 10-Q · filed 2013-11-07 | ||||
| 2012-06-30 | 0.70% 10-Q · filed 2012-08-09 | 0.70% 10-Q · filed 2013-08-08 | ||||
| 2012-03-31 | 0.60% 10-Q · filed 2013-05-03 | |||||
| 2011-09-30 | 0.50% 10-Q · filed 2012-11-09 | 0.60% 10-Q · filed 2012-11-09 | ||||
| 2011-06-30 | 0.80% 10-Q · filed 2012-08-09 | 0.70% 10-Q · filed 2012-08-09 | ||||
| 2011-03-31 | 0.60% 8-K · filed 2012-06-27 |
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