How to Calculate 2018 Delaware State Income Tax by Using State Income Tax Table

1. Find your income exemptions

2. Find your pretax deductions, including 401K, flexible account contributions ...

3. Find your gross income

4. Check the 2018 Delaware state tax rate and the rules to calculate state income tax

5. Calculate your state income tax step by step

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DELAWARE STATE TAX TABLES

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2025 Delaware State Tax Witholding Table
2024 Delaware State Tax Witholding Table
2023 Delaware State Tax Witholding Table
2022 Delaware State Tax Witholding Table
2021 Delaware State Tax Witholding Table
( 2020 2019 2018 2017 2016 )

Tax rate used in calculating Delaware state tax for year 2018

State Abbreviation:	DE
State Tax Withholding State Code:	10
Acceptable Exemption Form:	W-4
Basis For Withholding:	State Exemptions
Acceptable Exemption Data:	S, M,/ Number of Exemptions
TSP Deferred:	Yes
Special Coding:	None
Additional Information:	None

Withholding Formula (Delaware Effective 2018)

Subtract the biweekly Thrift Savings Plan contribution from the gross biweekly wages.
Multiply the adjusted gross biweekly wages times 26 to obtain the annual wages.
Determine the standard deduction allowance by applying the following guideline and subtract this amount from the annual wages.

Single	Married (Filing Jointly)	Married (Filing Separately)
$3,250	$6,500	$3,250

Apply the taxable income computed in step 3 to the following table to determine the annual Delaware tax withholding.

Tax Withholding Table
If the Amount of Taxable Income Is:		The Amount of Delaware Tax Withholding Should Be:
Over:	But Not Over:				Of Excess Over:
$ 0	$ 2,000	$ 0.00	plus	0.00%	$ 0
2,000	5,000	0.00	plus	2.20%	2,000
5,000	10,000	66.00	plus	3.90%	5,000
10,000	20,000	261.00	plus	4.80%	10,000
20,000	25,000	741.00	plus	5.20%	20,000
25,000	60,000	1,001.00	plus	5.55%	25,000
60,000	and over	2,943.50	plus	6.6%	60,000

Determine the annual tax credit by applying the following guideline and subtract this amount from the result of step 4.

Tax Credit = $110 x Number of Personal Exemptions
Divide the annual Delaware tax withholding by 26 to obtain the biweekly Delaware tax withholding.