--- title: Understanding Tax Calculations in Grantd description: Learn how Grantd calculates tax estimates and why the 5-year tax projection is a critical planning tool for equity compensation. --- [Skip to content](https://support.grantdequity.com/understanding-tax-calculations-in-grantd#main-content) [![Grantd Equity](https://support.grantdequity.com/hubfs/grantd-logo.svg)](https://grantdequity.com/) Open main navigation Close main navigation - [Contact us](mailto:support@grantdequity.com) [Contact us](mailto:support@grantdequity.com) Got a Question? - There are no suggestions because the search field is empty. 1. [Service Knowledge Base](https://support.grantdequity.com/?hsLang=en) 2. [Understanding Portfolio Analysis](https://support.grantdequity.com/understanding-portfolio-analysis?hsLang=en) 3. [Tax Planning](https://support.grantdequity.com/understanding-portfolio-analysis?hsLang=en#tax-planning) November 12, 2025 # Understanding Tax Calculations in Grantd ## Learn how Grantd calculates tax estimates and why the 5-year tax projection is a critical planning tool for equity compensation. ### Purpose of Tax Calculations The Grantd platform calculates federal and state income taxes for clients with equity compensation. The Grantd tax engine is designed to provide sophisticated estimates that help advisors model various scenarios and strategies throughout the year, recognizing that taxes are calculated on a "pay-as-you-go" basis with variables that may or may not occur. **Important:** These calculations are estimates based on current tax law and should be verified with a CPA for final tax preparation and filing. ### Understanding the U.S. Tax System Foundation The U.S. operates on a pay-as-you-go tax system, which requires you to pay income tax throughout the year as you earn or receive income. The two primary ways to do this are through tax withholding (from paychecks) and quarterly estimated tax payments. Failure to pay enough tax throughout the year can result in penalties. Your tax liability is determined by all income, deductions, and credits that occur between January 1 and December 31 of each tax year. This means: - Your tax liability can change based on when events happen (or don't happen) - Equity compensation events like stock option exercises, RSU vesting, and ESPP sales directly impact your taxes - Tax withholding throughout the year may not match your final tax liability - Planning opportunities exist to optimize the timing and amount of taxable events ### The 5-Year Tax Projection The Grantd platform provides a 5-year tax projection that serves as a living, breathing planning document—allowing you and your clients to model different scenarios and understand the tax implications before they occur. The 5-year view allows you to: - See how taxes evolve over time (especially with growth rate assumptions) - Identify years where AMT applies - Plan for tax reserve needs - Compare different timing strategies for equity compensation events ### Your Tax Model is a Living Document Your tax model should evolve with your client's situation. Consider updating when: | Trigger Event | Why Update Matters | | --- | --- | | Income Changes | Client receives a raise, bonus structure changes, or changes jobs | | Filing Status Changes | Marriage, divorce, or dependent status changes dramatically impact tax brackets and deductions | | Major Deduction Changes | Bought/sold home, large charitable gift, significant medical expenses | | Tax Law Changes | New legislation affects brackets, deductions, or credits | | Before Strategy Modeling | Ensure baseline is current before testing equity compensation scenarios | | Annual Review | At least once per year to maintain projection accuracy | | After Equity Events | Major vesting or exercise events should trigger baseline recalibration | Treating your tax model as a living document ensures your projections remain relevant and your equity compensation strategies are optimized based on current circumstances. ### What Makes Grantd Tax Calculations Reliable Grantd tax calculations are built on a foundation of transparent U.S. tax law, maintained by the Grantd team of tax experts who stay current with code changes. The platform follows the same sequential calculation process as the IRS Form 1040, applying current federal tax law at each step. ### Related Articles - [How Grantd Calculates Federal and State Income Tax](https://support.grantdequity.com/how-grantd-calculates-federal-and-state-income-tax?hsLang=en) - [How Equity Compensation Events Impact Your Taxes](https://support.grantdequity.com/how-equity-compensation-events-impact-your-taxes?hsLang=en) - [Understanding Your Tax Projection Results](https://support.grantdequity.com/understanding-your-tax-projection-results?hsLang=en) - [Tax Planning Best Practices](https://support.grantdequity.com/tax-planning-best-practices?hsLang=en) - [Getting started](https://support.grantdequity.com/getting-started?hsLang=en) - [Client & Holdings Management](https://support.grantdequity.com/client-holdings-management?hsLang=en) - [Platform Categories](https://support.grantdequity.com/platform-categories?hsLang=en#main-content) - [Data & Integrations](https://support.grantdequity.com/platform-categories?hsLang=en#data-integrations) - [International Support](https://support.grantdequity.com/platform-categories?hsLang=en#international-support) - [Platform Limitations](https://support.grantdequity.com/platform-categories?hsLang=en#platform-limitations) - [Reports & Customization](https://support.grantdequity.com/reports-customization?hsLang=en) - [Alerts & Monitoring](https://support.grantdequity.com/alerts-monitoring?hsLang=en) - [Administration](https://support.grantdequity.com/administration?hsLang=en) - [Understanding Portfolio Analysis](https://support.grantdequity.com/understanding-portfolio-analysis?hsLang=en#main-content) - [Market Assumptions & Analysis](https://support.grantdequity.com/understanding-portfolio-analysis?hsLang=en#market-assumptions-analysis) - [Tax Planning](https://support.grantdequity.com/understanding-portfolio-analysis?hsLang=en#tax-planning) - [Grantd Academy](https://support.grantdequity.com/grantd-academy?hsLang=en) [![Grantd Equity](https://support.grantdequity.com/hubfs/grantd-logo.svg "Grantd Equity")](http://grantdequity.com) Copyright © 2025, Grantd