529 Plan Calculator (2026)

529 plans and education funding

Section 529 qualified tuition programs let savings grow federally tax-free when withdrawals pay qualified education expenses—college, K–12 tuition up to limits, apprenticeships, and student loan repayments up to lifetime caps per beneficiary. Many states offer deductions or credits for contributions; this calculator focuses on balance growth, not state-specific benefits.

How to use the tool

Enter starting balance, monthly contribution, expected annual return, and years until withdrawal. Output is projected ending balance before considering financial aid treatment or non-qualified withdrawal penalties (income tax plus 10% on earnings).

Coordination with other savings

529 balances affect financial aid formulas differently than parent assets in some cases. Coverdell ESAs and UTMA accounts have separate rules. For 2026, the IRA contribution limit is $7,500 with a $1,100 catch-up at age 50 and older. Elective deferrals to 401(k), 403(b), and most workplace plans cap at $24,500, with catch-up contributions of $8,000 at age 50+ and an enhanced $11,250 catch-up for ages 60 through 63 under SECURE 2.0. HSA limits are $4,400 for self-only HDHP coverage and $8,750 for family coverage, plus a $1,000 catch-up at 55+. Social Security wages for payroll tax purposes stop at the $184,500 wage base (SSA 2026). 529 contributions are gifts—annual exclusion is $19,000 per donor per beneficiary in 2026 (confirm gift tax rules).

Related tools

Gift tax calculator, taxable vs tax-advantaged calculator, retirement calculator for parent retirement priority tradeoffs.

Sources

IRC §529; IRS Publication 970.

Documentation and recordkeeping

Keep copies of forms, notices, and account statements that support numbers you enter. IRS audits and state reviews often start with mismatches between third-party reporting and what you claimed. Reconcile calculator outputs to official worksheets before filing.

When to revisit your estimate

Life changes mid-year—marriage, divorce, a move, bonus income, or a new job—can shift brackets, credits, and phaseouts. Rerun the tool when those events occur rather than relying on a January estimate through December.

State and local taxes

This page focuses on federal rules unless noted. Many states piggyback on federal AGI or MAGI definitions but apply their own rates and credits. Pair federal estimates with the state income tax calculator when residency matters.

Professional guidance

Complex returns—AMT, NIIT, multi-state income, business ownership, or large conversions—benefit from a CPA or enrolled agent who can sign the return. Calculators here show the math chain; they do not replace personalized advice or e-file validation.

Methodology on this site

Core 2026 federal brackets, deductions, and payroll limits follow IRS Rev. Proc. 2025-32, SSA wage-base announcements, and CMS Medicare premium tables where applicable. We show assumptions in the result panel when a rule is simplified for education.

Quarterly check-ins

Retirees and self-employed filers should revisit estimates after each quarter when investment income, required distributions, or business profit shifts. Waiting until December limits your options for withholding adjustments and timely estimated payments.

Documentation and recordkeeping

Keep copies of forms, notices, and account statements that support numbers you enter. IRS audits and state reviews often start with mismatches between third-party reporting and what you claimed. Reconcile calculator outputs to official worksheets before filing.

When to revisit your estimate

Life changes mid-year—marriage, divorce, a move, bonus income, or a new job—can shift brackets, credits, and phaseouts. Rerun the tool when those events occur rather than relying on a January estimate through December.

State and local taxes

This page focuses on federal rules unless noted. Many states piggyback on federal AGI or MAGI definitions but apply their own rates and credits. Pair federal estimates with the state income tax calculator when residency matters.

Professional guidance

Complex returns—AMT, NIIT, multi-state income, business ownership, or large conversions—benefit from a CPA or enrolled agent who can sign the return. Calculators here show the math chain; they do not replace personalized advice or e-file validation.

Methodology on this site

Core 2026 federal brackets, deductions, and payroll limits follow IRS Rev. Proc. 2025-32, SSA wage-base announcements, and CMS Medicare premium tables where applicable. We show assumptions in the result panel when a rule is simplified for education.

Quarterly check-ins

Retirees and self-employed filers should revisit estimates after each quarter when investment income, required distributions, or business profit shifts. Waiting until December limits your options for withholding adjustments and timely estimated payments.

Reading official publications

IRS Publications and Instructions often walk through worksheets line by line. When our simplified path differs from a form worksheet, trust the form for filing and use this page for directional planning only.

Calculator directory

Browse related tools from the calculator directory when your question spans credits, payroll, retirement, and investment tax in the same year.

Withholding versus liability

Paycheck withholding and estimated tax payments are cash-flow tools. They are not the same as annual tax liability computed on the return. Use the W-4 withholding calculator and quarterly estimated tax calculator when you need payment timing, not just liability.

Standard deduction reminder

The 2026 standard deduction is $16,100 for single and married filing separately filers, $24,150 for head of household, and $32,200 for married filing jointly (IRS Rev. Proc. 2025-32). Itemized filers must beat those amounts on Schedule A for itemizing to win.

Documentation and recordkeeping

Keep copies of forms, notices, and account statements that support numbers you enter. IRS audits and state reviews often start with mismatches between third-party reporting and what you claimed. Reconcile calculator outputs to official worksheets before filing.

When to revisit your estimate

Life changes mid-year—marriage, divorce, a move, bonus income, or a new job—can shift brackets, credits, and phaseouts. Rerun the tool when those events occur rather than relying on a January estimate through December.