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Corporate
Tax Credits

Master how corporations reduce tax liability dollar-for-dollar using credits: from general business credits to foreign tax credits and their ordering, limitation, and carryback/carryforward rules.

CPA Regulation (REG)

What Are Tax Credits?

A tax credit directly reduces the amount of tax owed: dollar-for-dollar. Unlike a deduction, which reduces taxable income, a credit reduces the tax itself. If a corporation has a \(\$10{,}000\) tax liability and a \(\$3{,}000\) credit, the final tax due is \(\$7{,}000\).

Credit vs. Deduction

Deduction Taxable Income: $100,000 - $10,000 deduction = $90,000 taxable Tax @ 21%: $18,900 Saves: $2,100 Savings = Deduction x Rate Credit Tax Liability: $21,000 - $10,000 credit = $11,000 tax due Saves: $10,000 Full dollar-for-dollar Savings = Credit Amount vs

Major Corporate Credits

General Business Credit
Umbrella credit under IRC §38: combines R&D, Work Opportunity, Rehabilitation, and other credits into one limitation framework.
Foreign Tax Credit
Offsets U.S. tax on foreign-source income. Prevents double taxation. Computed under IRC §901.
Minimum Tax Credit
Allows carryforward of AMT paid in prior years to offset regular tax in future years.

The General Business Credit

The GBC (IRC §38) is a single, combined credit that bundles dozens of individual credits. Each component credit is computed separately, then aggregated. The GBC has its own limitation formula and ordering rules.

1
Research & Development Credit (§41): 20% of qualified research expenses above a base amount.
2
Work Opportunity Tax Credit (§51): Up to 40% of first \(\$6{,}000\) in wages for targeted groups.
3
Rehabilitation Credit (§47): 20% of qualified expenditures for certified historic structures.
4
Disabled Access Credit (§44): 50% of eligible access expenditures between \(\$250\) and \(\$10{,}250\).

GBC Limitation Formula

The net income tax is the regular tax liability plus AMT, minus certain non-refundable credits. The tentative minimum tax (TMT) acts as a floor: you cannot use GBC to push your tax below the TMT.

Foreign Tax Credit

Under IRC §901, a corporation may claim a credit for income taxes paid to foreign governments. The purpose: eliminate double taxation of the same income by both the U.S. and a foreign country.

Credit Ordering Rules

Gross Tax Liability Step 1: Foreign Tax Credit (applied first, subject to FTC limit) Step 2: General Business Credit (subject to GBC limitation) Step 3: Minimum Tax Credit (offsets regular tax only) = Net Tax Payable

Refundable vs. Nonrefundable

Refundable
Can reduce tax below zero: the excess is refunded as a payment. Rare for corporations. Example: certain fuel tax credits under §34.
Nonrefundable
Cannot reduce tax below zero. Excess is either lost or subject to carryback/carryforward rules. The GBC and FTC are nonrefundable.

How to Apply Credits

1
Compute regular tax liability: Apply the 21% corporate flat rate to taxable income.
2
Calculate each credit separately: FTC, R&D, WOTC, etc., each under its own IRC section.
3
Apply FTC first: Subject to the FTC limitation formula. Excess carries back 1 year / forward 10.
4
Apply GBC second: Subject to the GBC limitation (cannot reduce below TMT). Excess carries back 1 / forward 20.
5
Apply remaining credits: Minimum tax credit, then any other applicable credits in statutory order.

Example 1: Foreign Tax Credit

Facts: Acme Corp. has worldwide taxable income of \(\$500{,}000\), of which \(\$100{,}000\) is foreign-source. Acme paid \(\$28{,}000\) in foreign taxes. The U.S. tax rate is 21%.

Example 2: GBC Limitation

Facts: Beta Corp. has a net regular tax of \(\$80{,}000\), tentative minimum tax of \(\$50{,}000\), and total GBC components of \(\$40{,}000\).

Example 3: Full Credit Application

Facts: Gamma Corp. has \(\$200{,}000\) U.S. taxable income, \(\$60{,}000\) foreign-source income, \(\$15{,}000\) foreign taxes paid, R&D credit of \(\$8{,}000\), TMT of \(\$30{,}000\).

1
U.S. tax: \(\$200{,}000 \times 21\% = \$42{,}000\)
2
FTC limit: \(\$42{,}000 \times \frac{\$60{,}000}{\$200{,}000} = \$12{,}600\). Foreign taxes paid = \(\$15{,}000\). Credit = \(\$12{,}600\). Excess \(\$2{,}400\) carries forward.
3
After FTC: \(\$42{,}000 - \$12{,}600 = \$29{,}400\). GBC limit: \(\$29{,}400 - \max(\$30{,}000,\; 25\% \times (\$42{,}000 - \$25{,}000))\). Since TMT \(\$30{,}000 > \$4{,}250\), limit = \(\$29{,}400 - \$30{,}000 =\) negative. No GBC allowed this year.
4
Result: R&D credit of \(\$8{,}000\) is fully carried forward. Tax owed = \(\$29{,}400\).

Carryback & Carryforward Rules

Carryback Carryforward Ordering
General Business Credit 1 year 20 years FIFO (oldest first)
Foreign Tax Credit 1 year 10 years Applied before GBC
Minimum Tax Credit None Indefinite Applied after GBC

Common Mistakes

✕ Confusing Credits and Deductions
A \(\$5{,}000\) credit saves \(\$5{,}000\) in tax. A \(\$5{,}000\) deduction at 21% saves only \(\$1{,}050\). Never treat them as equivalent.
✕ Wrong Credit Ordering
The FTC must be applied before the GBC. Applying GBC first can yield an incorrect remaining tax and wrong GBC limitation.
✕ Ignoring the TMT Floor
The GBC cannot reduce tax below the tentative minimum tax. Forgetting this floor overstates the allowable credit.

Question 1 of 5

A corporation has a tax liability of \(\$50{,}000\) and a foreign tax credit of \(\$12{,}000\). How much is the net tax payable (ignoring other credits)?

Question 2 of 5

Delta Corp. has worldwide taxable income of \(\$400{,}000\), foreign-source income of \(\$80{,}000\), and paid \(\$20{,}000\) in foreign taxes. U.S. tax rate is 21%. What is the FTC limitation?

Question 3 of 5

Which credit is applied first when computing a corporation's net tax payable?

Question 4 of 5

Epsilon Corp. has a net regular tax of \(\$60{,}000\) and a tentative minimum tax of \(\$45{,}000\). What is the maximum General Business Credit allowed?

Question 5 of 5

A corporation's unused General Business Credit can be carried forward for how many years?