Key Features Features Updates Supported Authorities Resources
Key Features
The current release includes several new features which significantly enhance the functionality of the Equus Platform.
Enhanced Automatic Social Security
Added the following agreements. Select Yes from the Enhance Automatic Social Tax? tax position in the home tax estimator to utilize the feature.
Australia - India
Australia - Germany
Canada - United States
Germany - South Korea
New Swiss Canton: Aargau
Added support for the Swiss canton of Aargau, bringing the total number of supported cantons to 11. Situated in northern Switzerland, Aargau borders Germany. Its official language is German, and Aarau is its capital and largest city. The top cantonal rate of 11% is imposed on taxable income above CHF 352,700.
Canton Specific Tax Position
As with other supported cantons, the communal coefficient can be overridden by using the Communal Rate Override input. The default communal coefficient rate used is 1.11, which corresponds to the capital city of Aarau.
Features
The current release includes several new features which significantly enhance the functionality of the Equus Platform.
India
Social Security
Added a new tax position, Include G&S Allowance in Social Wage Base?, to allow users to either include or exclude the Goods and Services Allowance in the social base. This tax position defaults to Yes.
Italy
Income Tax
Enhanced the regional and municipal tax calculations as follows:
Added support for all regions in the Select Local Rate tax position. For each region, the highest municipal tax rate is used as a conservative default.
Added the Municipal Rate Override tax position to allow users to enter a flat municipal rate to use instead of the default.
Before recalculating pre-existing cost estimates, the Select Local Rate position should be updated with the applicable region, else the Lombardia, previously Low (2.53%), rates will be used as a default.
Saudi Arabia
Social Security
Updated the calculation for inbound assignments to include the 10.25% GOSI contribution for employee and employer when Calculate Social Taxes? is set to Yes.
United Arab Emirates
Social Security
Added a new tax position, GCC National?, that allows users to opt out of social security contributions for outbound employees who are not Gulf Cooperation Council (GCC) Nationals. Select No to apply this behavior.
United States
Indiana
Income Tax
Added a new tax position, Select County for Local Income Tax, to support local income tax calculations. Select from a list of 92 counties to use the applicable local flat tax rate. Rates range from 0.5% to 3%. If no county is selected, no local income tax will be calculated.
Proration of Employer Costs on Base Compensation
Added the following tax outputs, which can be used in cost estimate templates that use a Tax Calculation Method of Grossup Only:
Home Country Employer Social Tax on Base Comp - Prorated - Use with Grossup Only Option
Home Country Employer Payroll Tax on Base Comp - Prorated - Use with Grossup Only Option
The existing outputs, without “- Prorated”, reflect annual costs regardless of partial year status. With the addition of the two new outputs, users with grossup only templates can now achieve prorated costs without the need for workarounds in merge documents or other reports.
Updates
Updates include calculation and rate changes to reflect current tax law resulting from inflation adjustments, legislative changes, and review of supported authorities. Effective dates indicate when the changes enter into force. Amounts are annual unless stated otherwise.
Argentina
Income Tax
Increased the following, unless otherwise stated, effective July 1, 2025:
Tax bracket thresholds. The threshold for the 35% top bracket increased by ARS 7.0 million to ARS 53.2 million.
Basic deduction by ARS 295,619 to ARS 4.2 million.
Spouse deduction by ARS 278,414 to ARS 4.0 million.
Child deduction by ARS 140,405 to ARS 2.0 million.
Decreased the employee voluntary pension deduction limit by ARS 377,982 to ARS 195,845.
Australia
Social Security
Increased the Medicare levy surcharge thresholds, effective July 1, 2025. The threshold for the top 1.5% rate increased by AUD 7,000 to AUD 158,000.
Austria
Social Security
Decreased the employer pension contribution rate by 0.22% to 5.59%, effective January 1, 2025.
Bermuda
Payroll Tax
Corrected the rate by increasing by 0.25% to 10.25%.
Brazil
Income Tax & Social Security
Corrected the post-year calculation for inbounds to Brazil. Previously, an error prevented this scenario from calculating.
Social Security
Corrected the taxability of the following line items:
To not taxable:
Camp Accommodations Host Country
Dependent Home Study Costs
Education Allowance
Family Pre-assignment Medical and Immunization
Incentive/Performance Bonus
International Mobility (Settling-In) Allowance
Primary or Secondary School Costs Host Country
Relocation Allowance
Transportation Allowance Host Country
To taxable:
Employee Language and Cultural Training Costs
Employee Wellness and Fitness Host Country
Chile
Social Security
Increased the disability and life employer contribution rate by 0.10% to 1.88%, effective January 1, 2025.
China
Made changes for the following, effective January 1, 2025:
Foshan
Increased employer pension rate by 1% to 16%.
Increased wage ceiling by CNY 12,960 to CNY 330,012.
Guangzhou
Employer contribution rates:
Increased pension by 2% to 16%.
Decreased medical insurance by 1.5% to 4.5%.
Increased wage ceiling by CNY 12,960 to CNY 330,012.
Shanghai
Employer contribution rates:
Decreased medical insurance by 1% to 8%.
Increased occupational injury by 0.04% to 0.2%.
Shenzhen
Employer contribution rates:
Increased pension by 1% to 17%.
Decreased medical insurance by 0.2% to 5%.
Increased wage ceiling by CNY 12,960 to CNY 330,012.
Finland
Income Tax
Corrected the standard deduction to not calculate when the expatriate concession applies.
France
Income Tax
Corrected the following in the 155B Inpatriate Concession when a reference salary is entered:
Ensured the Reference Taxable Income calculation always includes deductible social security.
When Yes - With Hypo Deduction is also selected, ensured the Inpatriate Taxable Income calculation always includes the hypo deduction.
French Polynesia
Income Tax
Corrected the following contribution rates, effective January 1, 2024:
Employee pension decreased by 5.81% to 2.03%.
Employer pension decreased by 11.62% to 4.07%.
Employer social security and vocational increased by 1.05% to 11.51%
Gabon
Income Tax
Corrected the income tax calculation by removing the salary tax deduction.
Greece
Income Tax
Changed the following line items to be nontaxable, effective January 1, 2025:
Employee Medical Emergencies Host Country
Family Medical Emergencies Host Country
Israel
Income Tax
Corrected the following to 2024 amounts as a result of Israel pausing indexation increases until 2028 (previous amounts would have resulted in a tax understatement):
Tax bracket thresholds. The 50% top bracket threshold decreased by ILS 24,720 to ILS 721,560.
Credit point value decreased by ILS 108 to ILS 2,904.
Italy
Income Tax
Corrected the employment credit at the lowest threshold by increasing the amount by EUR 75 to EUR 1,955, effective January 1, 2025.
Jersey
Social Security
Corrected the employer contribution calculation by removing a duplicative 2.5% Long Term Care contribution.
Liechtenstein
Income Tax
Corrected by increasing the following, effective January 1, 2025:
Tax bracket thresholds. The threshold for the 22% top bracket increased by CHF 11,400 to CHF 211,400.
Standard and child deductions by CHF 100 to CHF 1,600 and CHF 700 to CHF 12,700, respectively.
Malaysia
Social Security
As a result of legislation that introduced a noncitizen social security rate of 2% on employees and employers, effective October 1, 2025:
Added the Malaysian Citizen? tax position to determine whether to use the citizen or noncitizen rates, defaulting to citizen rates.
Removed the assumption that inbound assignments with Calculate Social Taxes? set to Automatic are for noncitizens.
Note that pre-existing cost estimates with Malaysia as the host country will have the following defaults applied via a release script that is delivered with the Equus Tax Engine v.25.5, in order to maintain the pre-existing behavior:
Where Calculate Social Taxes? is set to Yes, Malaysian Citizen? will be set to Yes.
Where Calculate Social Taxes? is set to Automatic or No, Malaysian Citizen? will be set to No.
Mauritius
Income Tax
Updated the tax table from an eleven-tiered to a 4-tiered table with a 35% top rate on income exceeding MUR 12 million, effective July 1, 2025.
Social Security
Increased the pension wage ceiling by MUR 85,620 to MUR 342,840, effective July 1, 2025.
North Macedonia
Corrected the following by increasing the amounts, effective January 1, 2025:
Income Tax
Standard deduction by MKD 8,760 to MKD 123,240.
Social Security
Employee social wage ceiling by MKD 1.1 million to MKD 12.1 million.
Pakistan
Social Security
Increased the wage ceiling by PKR 36,000 to PKR 480,000, effective July 1, 2025.
Panama
Social Security
Consolidated disability, old age, death, health, and maternity contributions into rates of 9.75% and 13.25% for employees and employers, respectively, effective March 18, 2025. This update includes a 0.95% increase to the total employer rate for these components.
Portugal
Income Tax
Decreased the tax rates, effective January 1, 2025. The top rate applicable to income exceeding EUR 83,696 remains 48%.
Serbia
Income Tax & Social Security
Added the inpatriate concession. Set Qualifies for Inpatriate Concession? to Yes to exempt 70% of income from income tax and social security for qualifying employees.
Sint Maarten
Income Tax
Increased the following, effective January 1, 2025:
Tax bracket thresholds. The 47.5% top bracket increased by ANG 13,731 to ANG 158,252.
Personal deduction by ANG 91 to ANG 591.
Added a personal credit of ANG 2,332.
Slovakia
Income Tax
Removed the child tax credit, effective January 1, 2025.
Switzerland
Vaud
Income Tax
Increased the following:
Effective January 1, 2025:
Insurance premium deduction phaseout thresholds:
Lower threshold by CHF 3,700 to CHF 126,300.
Upper threshold by CHF 3,700 to CHF 164,100.
Effective January 1, 2024: family quotient ceiling and per-child adjustment by CHF 3,500 to CHF 210,100 and CHF 400 to CHF 23,300, respectively.
United Arab Emirates
Social Security
Corrected the wage ceiling to prorate for inbound, part year assignments when Calculate Social Taxes? is set to Yes.
United Kingdom
Income Tax
Enhanced the Overseas Workday Relief, effective April 6, 2025:
Removed the Qualify for Overseas Workday Relief tax position, replacing it with Overseas Workday Relief Percent to remove the need for users to manually update the workdays.
Added maximum relief of the lesser of 30% of net income or GBP 300,000 per year.
Added display for the Overseas Workday Relief calculation on the calculation detail report.
As a result, any cost estimates that previously used Qualifies for Overseas Workday Relief? should be updated to use this new tax position.
United States
Income Tax
Corrected calculations for the following states to ensure no home state tax is output for nondomiciled employees on domestic assignments:
Arkansas
Colorado
Delaware
Iowa
Kansas
Maine
Minnesota
Montana
New York
Corrected calculations for the following states to ensure that local tax is not prorated for outbounds on domestic assignments when there is nonassignment income:
Delaware
New York
Ohio
Enhanced the display of domestic cost estimates to give greater detail into the calculation of home state taxes by showing the following:
Home and host state taxes available for credit.
Home state non-assignment taxes.
Made the following changes as a result of H.R. 1 (One Big Beautiful Bill Act), retroactively effective January 1, 2025:
Increased the following:
Standard deduction for all filing status. The deduction increased by USD 750 for single taxpayers.
Child tax credit by USD 200 to USD 2,200.
Maximum State and Local Tax (SALT) deduction by USD 30,000 to USD 40,000. The maximum is halved for married employees filing separately.
Added a phaseout to the SALT deduction. For single taxpayers with Adjusted Gross Income over USD 250,000, the maximum SALT deduction decreases by 30% of AGI in excess of the threshold, to a minimum of USD 10,000.
Social Security
Corrected the Additional Medicare contribution to not calculate if Medicare is covered by an enhanced social security agreement.
California
Income Tax
Increased the following for all filing status based on CPI changes, retroactively effective January 1, 2025:
Bracket thresholds. The threshold for the 12.3% top bracket increased by USD 21,639 to USD 742,952 for single employees. An additional 1% tax is imposed on income over USD 1 million.
Standard deductions and exemption credits.
Phaseout threshold for itemized deductions and exemption credits.
Maine
Income Tax
Made the following changes to the dependent credit, effective January 1, 2025:
Increased the phaseout amount by USD 12.50 to USD 20.
Decreased the phaseout step by USD 500 to USD 500.
Decreased the phaseout thresholds for all filing status. The threshold decreased by USD 100,000 to USD 100,000 for single employees.
Wisconsin
Income Tax
Increased the 4.4% middle bracket threshold for all filing status, retroactively effective January 1, 2025. The threshold increased by USD 21,110 to USD 50,480 for single employees.
Recommended Tax Positions
Added the following tax positions and default values to the 25.5 Standard Tax Position Sets:
Tax Estimator | Location | Tax Input Name | Long Term | Permanent | Short Term | Recalculation Behavior |
Australia | Home | Enhance Automatic Social Tax? | No | No | No | No |
CHE Aargau | Home | Communal Rate Override | 0 | 0 | 0 | 0 |
India | Home | Include G&S Allowance in Social Wage | Yes | Yes | Yes | Yes |
Italy | Home | Municipal Rate Override | **Value Not | **Value Not | **Value Not | **Value Not |
Malaysia | Home | Malaysian Citizen? | Yes | Yes | Yes | Yes |
Malaysia | Host | Malaysian Citizen? | No | No | No | Yes |
South Korea | Home | Enhance Automatic Social Tax? | No | No | No | No |
United Arab | Home | GCC National? | Yes | Yes | Yes | Yes |
United | Host | Overseas Workday Relief Percent | **Value Not | **Value Not | **Value Not | **Value Not |
USA Indiana | Home | Select County for Local Income Tax | **Please | **Please | **Please | **Please |
Changed the name of the default option for Italy, Home and Host, Select Local Rate? from Low (2.53%) to Lombardia. This default option provides the same rate of 2.53%.
Supported Authorities
Search “supported authorities” and "supported subauthorities" in the help center for a full list of our 227 supported authorities including:
155 Countries
50 American States and the District of Columbia
10 Canadian Provinces
11 Swiss Cantons
Resources
Help Center articles updated this release: