Fiscal Note
Fiscal Services Division
SF 552 – Income and Insurance Premium Tax Reduction (LSB1993SV)
Staff Contact: Jeff Robinson (515.281.4614) jeff.robinson@legis.iowa.gov
Fiscal Note Version – New
Description
Senate File 552 relates to individual and corporate income tax rates and the insurance premium
tax. The Bill includes the following provisions:
• Division I — Decreases Iowa’s individual income tax rate(s) for tax year (TY) 2025 through
TY 2029. After TY 2028, the Bill establishes an annual calculation that uses the balance in
the Taxpayer Relief Fund (TRF) (see Iowa Code section 8.57E) to reduce the Iowa income
tax rate for the upcoming and future tax years. The annual calculation is performed until the
Iowa individual income tax rate equals 0.00%.
• Division II — Decreases the corporate income tax net revenue threshold found in Iowa
Code section 422.33(1)(b) from the current $700.0 million to $680.0 million. The threshold
is used in current law to determine if sufficient corporate income tax net revenue was
deposited to the State General Fund in the previous fiscal year to require a reduction in the
top corporate income tax rate effective for the next tax year. The Bill also lowers the
minimum corporate income tax rate allowed under this annual adjustment process from the
current minimum of 5.50% to 4.75%.
• Division III — Decreases the current 1.00% insurance premium tax rate to 0.95% for
calendar year 2025 and 0.90% for calendar year 2026 and after.
• Division IV — Amends Iowa Code section 422.7(43), which excludes the net capital gain on
the sale of certain qualified stock. The section was originally enacted in 2022 Iowa Acts,
chapter 1002 (State Taxation and Revenue Act).
Division IV is effective upon enactment and applies retroactively to January 1, 2023. The
remainder of the Bill is effective July 1, 2023.
Division I — Individual Income Tax
Background
Under current law, Iowa will have two individual income tax rates for tax year (TY) 2025 (4.40%
and 4.82%). For TY 2026 and after, Iowa will have a single tax rate of 3.90%. The Bill lowers
the TY 2025 rates to 4.00% and 4.40% and lowers the single tax rate for TY 2026 through
TY 2028 to the following percentages:
• TY 2026 = 3.55%
• TY 2027 = 2.95%
• TY 2028 = 2.50%
For TY 2029, the single rate will remain at 2.50%. After TY 2029, the rate will remain at 2.50%
unless lowered through a provision of the Bill that requires any balance in the TRF to be used to
reduce the income tax rate, beginning with TY 2030. The potential individual income tax rate
reduction is accomplished through direction to the Department of Revenue (Department) to
perform a calculation in November 2029, and each succeeding November, until the individual
income tax rate is reduced to zero.
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Assumptions
The projected fiscal impact was estimated by the Department through the use of an individual
income tax model developed for the 2023 Legislative Session. The model is based on actual
Iowa income tax returns filed for TY 2021, and those returns are used to project tax liability
under current law and under the proposed law. For the projections, the following assumptions
were used:
• TY 2021 tax return factors (income, dependents, exemptions, tax credits, etc.) are aged to
reflect annual changes to each factor based on actual historical tax return information and
Department projections of Iowa economic growth and population change.
• Federal tax provisions that are scheduled to expire without congressional action to extend
them are assumed to expire as provided in current law.
• Iowa’s future income tax rate reductions are assumed in the current-law model.
• The model produces estimated income tax liability changes on a tax year basis. The
Department converts tax year impacts to fiscal year impacts using historical relationships in
tax withholding, tax estimate payments, payments with tax returns, and tax refunds.
• Since the Bill reduces income tax rates, income tax withholding tables will be reduced to
better match income tax withholding with actual income tax liability. Lowering income tax
withholding also reduces the amount of income tax withheld from the paychecks of
taxpayers who do not file individual income tax returns (referred to as “nonfilers”). Since the
Department’s model is based on actual income tax returns, nonfilers are not represented in
the model and the withholding impact for nonfilers must be adjusted outside of the model.
• The Bill lowers income tax rates and income tax liability. The local option income surtax for
schools equals a percentage of Iowa income tax liability. Therefore, a reduction in State
income tax liability is assumed to reduce the amount of revenue raised through the surtax.
The reduction is assumed to equal 2.5% of any projected change in State income tax
liability.
Fiscal Impact
The Department projects that the reduction in income tax rates for TY 2025 through TY 2029
will reduce income taxes by the amounts listed in the top portion of Figure 1, while the bottom
portion provides the projected reduction in State General Fund revenue by fiscal year.
Figure 1
Projected Individual Income Tax Change by Tax Year, in Millions
Tax Year Estimate TY 2023 TY 2024 TY 2025 TY 2026 TY 2027 TY 2028 TY 2029
Resident Filers $ 0.0 $ 0.0 $ -356.3 $ -300.5 $ -837.6 $ -1,263.9 $ -1,308.1
Nonresident Filers 0.0 0.0 -30.6 -25.8 -71.8 -108.4 -112.2
Nonfilers 0.0 0.0 -14.3 -15.8 -44.2 -67.0 -69.3
Total $ 0.0 $ 0.0 $ -401.2 $ -342.1 $ -953.6 $ -1,439.3 $ -1,489.6
Projected State General Fund Revenue Change by Fiscal Year, in Millions
Fiscal Year Estimate FY 2023 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Tax Change $ 0.0 $ 0.0 $ -150.2 $ -405.2 $ -622.5 $ -1,177.1 $ -1,450.0
The Department does not have sufficient information to project the potential impact of the Bill’s
contingent tax rate reductions that will occur if the balance in the TRF is sufficient after FY 2029.
The potential impact on Iowa individual income tax and State General Fund revenue is
discussed in the Fiscal Impact Summary section at the end of this Fiscal Note.
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Division II — Corporate Income Tax
Background
Under current law, the top corporate income tax rate (8.40% for TY 2023) may be lowered if
corporate income tax revenue, net of tax refunds issued, exceeds $700.0 million for a fiscal
year. This annual potential tax rate reduction will occur until corporate income is subject to a
single tax rate of 5.50%. The Bill lowers the annual dollar threshold to $680.0 million and lowers
the minimum corporate income tax rate to 4.75%.
Assumptions
The projected fiscal impact was estimated by the Department through the use of a corporate
income tax model developed for the 2023 Legislative Session. The model is based on actual
Iowa corporate income tax returns filed for TY 1990 through TY 2021, and those returns are
used to project tax liability under current law and under the proposed law. For the projections,
the following assumptions were used:
• Tax return factors (income, expenses, exemptions, tax credits, etc.) are aged to reflect
annual changes to each factor based on actual historical tax return information and
Department projections of Iowa economic growth and population change.
• Iowa’s existing contingent corporate income tax rate reduction process is assumed in the
current-law model.
• The model produces projected income tax liability changes on a tax year basis. The
Department converts tax year impacts to fiscal year impacts using historical relationships in
corporate income tax estimate payments, payments with tax returns, and tax refunds.
• The Department’s assumptions concerning future corporate income tax liability under
existing law and under the proposal produce the projected corporate income tax rates
shown in Figure 2.
Figure 2
Projected Iowa Corporate Income Tax Rates
Current Law Proposed Law
Up to More Than Up to More Than
Tax $100,000 in $100,000 in $100,000 in $100,000 in
Year Taxed Income Taxed Income Taxed Income Taxed Income
2023 5.50% 8.40% 5.50% 8.40%
2024 5.50% 7.70% 5.50% 7.70%
2025 5.50% 6.00% 5.50% 5.80%
2026 5.50% 5.50% 4.75% 4.75%
2027 5.50% 5.50% 4.75% 4.75%
2028 5.50% 5.50% 4.75% 4.75%
Fiscal Impact
The Department projects that the reduction in corporate income tax rates will reduce taxes owed
and State General Fund receipts by the amounts listed in Figure 3.
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 Figure 3
Corporate Income Tax Projections
and State General Fund Tax Revenue Change
In Millions
Fiscal Year Estimate FY 2023 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Current Law $ 858.4 $ 830.1 $ 810.6 $ 708.3 $ 686.1 $ 737.2 $ 750.0
Proposed Law 858.4 824.1 789.3 675.0 617.1 654.4 665.7
Tax Revenue Change $ 0.0 $ -6.0 $ -21.3 $ -33.3 $ -69.0 $ -82.8 $ -84.3
Division III — Insurance Premium Tax
Background
Insurance companies do not pay Iowa corporate income tax on their insurance business, and
insurance sales are not subject to the State sales tax. The taxation of insurance business is
imposed through an insurance premium tax. Iowa’s insurance premium tax rate is equal to
1.00% of premiums paid for Iowa domiciled companies and for companies not domiciled in Iowa
but with a home state insurance premium tax rate of 1.00% or lower. Companies not domiciled
in Iowa that have a home state tax rate higher than 1.00% pay an insurance premium tax rate
equal to the rate of their home state.
The Bill lowers the insurance premium tax rate to 0.95% for calendar year 2025 insurance
premiums and 0.90% for calendar years after 2025.
Insurance premiums for sales made in a calendar year are subject to two prepayments during
the calendar year, each of which is equal to 50.0% of a company’s insurance premium tax
liability from the previous calendar year. A final payment, if necessary, is due when the annual
insurance premium tax return is filed in March following the end of a calendar year.
Assumptions
The assumptions used to estimate the fiscal impact of the two-stage rate reduction are as
follows:
• The March 2023 Revenue Estimating Conference estimate for insurance premium tax
revenue for FY 2024 ($151.6 million) is assumed for that fiscal year. For future fiscal years,
insurance premium tax receipts are assumed to increase 2.4% per year under current law.
• The annual total of insurance premium tax refunds is a minor amount and is ignored for the
projection. If an annual tax return shows that a company’s prepayments exceeded the tax
liability for the year, the excess becomes part of the company’s next prepayment.
• For the proposed law and based on historical insurance premium tax payment patterns,
calendar year prepayment and final payments are assumed to occur 53.8% before July 1
and 46.2% after the start of the new fiscal year.
Fiscal Impact
Based on the assumptions, the Department’s projections for fiscal year insurance premium tax
receipts under current law and under the proposal, as well as the projected difference (fiscal
impact), are presented in Figure 4.
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 Figure 4
Insurance Premium Tax Projections
and State General Fund Tax Revenue Change
In Millions
FY 2023 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Current Law $ 151.4 $ 151.6 $ 155.2 $ 158.9 $ 162.7 $ 166.6 $ 170.6
Proposed Law 151.4 151.6 152.0 146.7 145.9 149.4 152.8
Tax Revenue Change $ 0.0 $ 0.0 $ -3.2 $ -12.2 $ -16.8 $ -17.2 $ -17.8
Division IV — Qualified Stock Capital Gains
Background
Current Iowa law provides for a tax exemption for capital gains realized through the sale of
certain qualified stock. The exemption is phased in over a three-tax year period, with 33.3% of
any gain exempted for TY 2023, 66.0% for TY 2024, and 100.0% for TY 2025 and after. To
qualify, the stock must have been acquired by the taxpayer while the taxpayer was employed by
a qualified corporation and on account of that same employment. The exemption is established
in Iowa Code section 422.7(43). That section was originally enacted in 2022 Iowa Acts, chapter
1002 (State Taxation and Revenue Act).
The Bill expands the availability of the capital gains by changing three definitions. The changes
are effective upon enactment and apply retroactively to tax years beginning on or after January
1, 2023. Specifically, the Bill:
• Modifies the definition of “employee-owner” to include employment at a qualified corporation
rather than an individual who owns capital stock in a qualified corporation for at least 10
years while employed at and on account of employment with the corporation.
• Modifies the definition of “Iowa affiliated group” within the definition of “qualified corporation”
to include an affiliated group that is eligible to make a valid election to file an Iowa
consolidated income tax return rather than an affiliated group that has made a valid election
to file an Iowa consolidated income tax return.
• Modifies the definition of “member” within the definition of “qualified corporation” to include
any entity that is eligible to be included in a consolidated return rather than any entity that is
actually included in the consolidated return.
Assumptions
The assumptions used to estimate the fiscal impact of the expansion of the capital gains
exemption are as follows:
• The Fiscal Note for the 2022 legislation (HF 2317, State Taxation and Revenue Act) that
created the current exemption was used as the basis for this Bill’s expansion of the capital
gains exemption. That Fiscal Note projected a $4.0 million State General Fund revenue
reduction for FY 2024 that increased to $9.5 million for FY 2028.
• Employees who work for a single qualified company for at least 10 years qualify under the
current exemption. The Bill expands the types of employment that may result in a potential
capital gains exemption. The two additional potential groups include:
• Group 1 — Employees who work for more than one qualified corporation within a group
of corporations that file a consolidated Iowa corporate income tax return.
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 • Group 2 — Employees who work for one or more corporations where the corporations
are eligible to file a consolidated Iowa corporate income tax return but the corporations
chose not to do so.
• It is assumed that Group 1 will represent a small number of additional taxpayers qualifying
for the capital gains exemption.
• It is assumed that Group 2 will represent a significant increase in the pool of taxpayers who
are potentially eligible for the capital gains exemption.
• Information from Iowa corporate income tax returns filed for TY 2011 through TY 2020 was
analyzed to estimate what percentage of Iowa corporate income tax is derived from three
types of corporate income tax filers, with the percentages used to estimate how the capital
gains exemption will increase if expanded to include the employees of additional
corporations. The types and the corporate income tax percentages were determined as
follows:
• Type 1 — Corporations filing separate Iowa and separate federal income tax returns.
Type 1 represents 15.0% of Iowa corporate income tax liability.
• Type 2 — Corporations filing separate Iowa and consolidated federal income tax returns.
Type 2 represents 44.0% of Iowa corporate income tax liability.
• Type 3 — Corporations filing consolidated Iowa and consolidated federal income tax
returns. Type 3 represents 41.0% of Iowa corporate income tax liability.
• Type 3 represents the employment situations that currently qualify for the capital gains
exemption (41.0%). The remaining 59.0% of corporate income tax liability is represented by
Types 1 and 2. The addition of 59.0% to the current assumed 41.0% represents an addition
of 119.5% of the impact assumed in the 2022 Fiscal Note.
• The Bill lowers income tax rates and income tax liability. The local option income surtax for
schools equals a percentage of Iowa income tax liability. Therefore, a reduction in State
income tax liability is assumed to reduce the amount of revenue raised through the surtax.
The reduction is assumed to equal 2.5% of any projected change in State income tax
liability.
• Tax year impacts on State General Fund revenue are assumed to occur after June 30 of the
tax year.
Fiscal Impact
The projected individual income tax reduction associated with the expansion of the capital gains
exemption is