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INCOME TAXES (Tables)
12 Months Ended
Dec. 31, 2020
Income Tax Disclosure [Abstract]  
Components of Income Tax Expense
The components of income tax expense are as follows:
Eversource
(Millions of Dollars)
For the Years Ended December 31,
202020192018
Current Income Taxes:   
Federal$73.6 $56.9 $106.5 
State19.1 10.5 10.6 
Total Current92.7 67.4 117.1 
Deferred Income Taxes, Net:   
Federal173.5 138.4 122.6 
State83.7 71.4 52.2 
Total Deferred257.2 209.8 174.8 
Investment Tax Credits, Net(3.7)(3.7)(2.9)
Income Tax Expense$346.2 $273.5 $289.0 
 For the Years Ended December 31,
 202020192018
(Millions of Dollars)CL&PNSTAR
Electric
PSNHCL&PNSTAR ElectricPSNHCL&PNSTAR ElectricPSNH
Current Income Taxes:         
Federal$12.0 $53.9 $20.6 $68.4 $82.6 $22.9 $54.2 $79.3 $12.2 
State(6.1)6.9 3.8 15.4 18.2 2.2 20.9 30.0 (0.5)
Total Current5.9 60.8 24.4 83.8 100.8 25.1 75.1 109.3 11.7 
Deferred Income Taxes, Net:   
Federal101.1 33.8 (1.3)35.2 0.1 5.8 48.5 27.9 15.4 
State43.4 38.8 8.6 18.8 27.0 10.1 6.4 13.5 20.5 
Total Deferred144.5 72.6 7.3 54.0 27.1 15.9 54.9 41.4 35.9 
Investment Tax Credits, Net(0.7)(2.6)— (0.8)(2.6)— (0.9)(1.8)— 
Income Tax Expense$149.7 $130.8 $31.7 $137.0 $125.3 $41.0 $129.1 $148.9 $47.6 
Summary of Reconciliation Between Income Tax Expense and Expected Tax
A reconciliation between income tax expense and the expected tax expense at the statutory rate is as follows:
Eversource
(Millions of Dollars, except percentages)
For the Years Ended December 31,
202020192018
Income Before Income Tax Expense$1,558.9 $1,190.1 $1,329.5 
Statutory Federal Income Tax Expense at 21%327.4 249.9 279.2 
Tax Effect of Differences:  
Depreciation(11.1)1.9 (30.8)
Investment Tax Credit Amortization(3.7)(3.7)(2.9)
State Income Taxes, Net of Federal Impact44.9 24.6 44.4 
Dividends on ESOP(5.1)(5.1)(5.1)
Tax Asset Valuation Allowance/Reserve Adjustments33.4 40.1 5.2 
Excess Stock Benefit (6.6)(1.5)(1.5)
EDIT Amortization(48.7)(37.4)(5.0)
Other, Net15.7 4.7 5.5 
Income Tax Expense$346.2 $273.5 $289.0 
Effective Tax Rate22.2 %23.0 %21.7 %
 For the Years Ended December 31,
 202020192018
(Millions of Dollars, except percentages)CL&PNSTAR
Electric
PSNHCL&PNSTAR
Electric
PSNHCL&PNSTAR
Electric
PSNH
Income Before Income Tax Expense$607.6 $575.8 $179.0 $547.8 $557.3 $175.0 $506.8 $532.0 $163.5 
Statutory Federal Income Tax
Expense at 21%
127.6 120.9 37.6 115.0 117.0 36.8 106.4 111.7 34.3 
Tax Effect of Differences:         
Depreciation0.4 (3.7)(1.4)(0.2)(3.0)(0.8)(1.2)(2.8)0.1 
Investment Tax Credit Amortization(0.7)(2.6)— (0.8)(2.6)— (0.9)(1.8)— 
State Income Taxes,
  Net of Federal Impact
(1.2)36.0 9.8 2.5 35.7 9.8 14.5 33.2 15.8 
Tax Asset Valuation
  Allowance/Reserve Adjustments
30.7 — — 24.5 — — 7.1 1.2 — 
Excess Stock Benefit(2.3)(2.3)(0.8)(0.5)(0.5)(0.2)(0.1)(0.1)(0.1)
EDIT Amortization(9.0)(20.4)(15.4)(5.8)(22.9)(4.0)— — (4.4)
Other, Net4.2 2.9 1.9 2.3 1.6 (0.6)3.3 7.5 1.9 
Income Tax Expense$149.7 $130.8 $31.7 $137.0 $125.3 $41.0 $129.1 $148.9 $47.6 
Effective Tax Rate24.6 %22.7 %17.7 %25.0 %22.5 %23.4 %25.5 %28.0 %29.1 %
Schedule of Accumulated Deferred Income Tax Obligations The tax effects of temporary differences that give rise to the net accumulated deferred income tax obligations are as follows:
 As of December 31,
 20202019
(Millions of Dollars)EversourceCL&PNSTAR
Electric
PSNHEversourceCL&PNSTAR
Electric
PSNH
Deferred Tax Assets:      
Employee Benefits$602.4 $144.5 $79.8 $56.6 $509.4 $125.4 $54.8 $46.7 
Derivative Liabilities92.6 91.8 — — 105.0 103.6 — — 
Regulatory Deferrals - Liabilities259.8 30.2 161.8 13.4 267.0 37.1 165.7 19.0 
Allowance for Uncollectible Accounts87.5 42.3 20.9 4.6 56.7 25.7 17.7 2.8 
Tax Effect - Tax Regulatory Liabilities810.9 331.4 271.8 105.2 830.4 333.5 280.9 111.3 
Net Operating Loss Carryforwards12.7 — — — 9.1 — — — 
Purchase Accounting Adjustment54.5 — — — 58.7 — — — 
Other200.3 100.9 14.3 19.8 190.4 92.0 35.8 20.0 
Total Deferred Tax Assets2,120.7 741.1 548.6 199.6 2,026.7 717.3 554.9 199.8 
Less:  Valuation Allowance48.3 33.7 — — 43.0 24.9 — — 
Net Deferred Tax Assets$2,072.4 $707.4 $548.6 $199.6 $1,983.7 $692.4 $554.9 $199.8 
Deferred Tax Liabilities:        
Accelerated Depreciation and Other
  Plant-Related Differences
$4,153.6 $1,438.1 $1,489.4 $453.8 $3,901.0 $1,362.2 $1,391.9 $428.9 
Property Tax Accruals88.7 39.0 37.0 5.8 76.8 36.8 29.0 4.7 
Regulatory Amounts:
Regulatory Deferrals - Assets1,376.7 444.8 324.4 263.4 1,155.6 340.7 276.2 260.9 
Tax Effect - Tax Regulatory Assets244.6 174.4 11.3 8.6 238.2 171.7 11.7 8.3 
Goodwill Regulatory Asset - 1999 Merger86.0 — 73.8 — 90.6 — 77.8 — 
Derivative Assets17.8 17.8 — — 19.7 19.7 — — 
Other200.3 1.6 72.6 5.6 257.6 5.9 125.6 3.2 
Total Deferred Tax Liabilities$6,167.7 $2,115.7 $2,008.5 $737.2 $5,739.5 $1,937.0 $1,912.2 $706.0 
Summary of Tax Credits and Loss Carryforwards The following table provides the amounts and expiration dates of state tax credit and loss carryforwards and federal tax credit and net operating loss carryforwards:
As of December 31,
 20202019
(Millions of Dollars)EversourceCL&PNSTAR
Electric
PSNHExpiration RangeEversourceCL&PNSTAR
Electric
PSNHExpiration Range
Federal Net Operating Loss$— $— $— $— $19.8 $— $— $— 2033 - 2037
State Net Operating Loss183.4 — — — 2021 - 204065.5 — — — 2020 - 2038
State Tax Credit186.6 133.4 — — 2020 - 2025168.1 122.3 — — 2019 - 2024
State Charitable Contribution10.2 — — — 2020 - 20249.9 — — — 2019 - 2023
Summary of Income Tax Contingencies A reconciliation of the activity in unrecognized tax benefits, all of which would impact the effective tax rate if recognized, is as follows:
(Millions of Dollars)EversourceCL&P
Balance as of January 1, 2018$51.7 $18.1 
Gross Increases - Current Year9.2 3.2 
Gross Decreases - Prior Year(6.5)(0.9)
Lapse of Statute of Limitations(8.5)(2.2)
Balance as of December 31, 201845.9 18.2 
Gross Increases - Current Year12.1 4.0 
Gross Increases - Prior Year3.4 3.3 
Lapse of Statute of Limitations(6.4)(2.4)
Balance as of December 31, 201955.0 23.1 
Gross Increases - Current Year11.9 4.6 
Gross Increases - Prior Year1.4 0.7 
Lapse of Statute of Limitations(6.5)(2.6)
Balance as of December 31, 2020$61.8 $25.8 
The amount of interest expense/(income) on uncertain tax positions recognized and the related accrued interest payable/(receivable) are as follows:  
 Other Interest IncomeAccrued Interest Expense
 For the Years Ended December 31,As of December 31,
(Millions of Dollars)20202019201820202019
Eversource$— $— $(1.7)$0.1 $0.1 
Summary of Income Tax Examinations The following table summarizes Eversource, CL&P, NSTAR Electric, and PSNH's tax years that remain subject to examination by major tax jurisdictions as of December 31, 2020:
DescriptionTax Years
Federal2020
Connecticut2017 - 2020
Massachusetts2017 - 2020
New Hampshire2017 - 2020