California Estimated Tax Payments for Retirees: Form 540-ES

Editorial note: This page is educational and is not legal, tax, or financial advice. California estimated tax payment rules, thresholds, and due dates change year to year. Consult a California licensed CPA or tax attorney for the numbers, credits, and safe-harbor decisions that fit your specific facts before you make or skip a Form 540-ES payment.

Last updated: August 13, 2026 · By Gold California Editorial

This page explains the California estimated tax rules for people receiving pension, annuity, and traditional IRA income. It cites the statute and the current Franchise Tax Board form instructions on every point. Nothing here is tax advice, and a California CPA should confirm the numbers for your specific facts before you send or skip a payment.

California withholding rules and federal withholding rules differ. That gap is why a retiree who never worried about estimated tax during working years may need to start filing Form 540-ES after the first full year of retirement income.

Who must make California estimated tax payments

Section 19136 of the Revenue and Taxation Code applies Internal Revenue Code Section 6654 to California, with modifications. The general rule flows through: a taxpayer who expects to owe California tax after withholding and credits generally must pay it in quarterly installments during the year (source: California Revenue and Taxation Code Section 19136).

The 2025 Instructions for Form 540-ES restate the threshold in plain language. A taxpayer generally must make estimated tax payments if they expect to owe at least $500 in California tax for 2025 after subtracting withholding and credits (source: FTB, 2025 Instructions for Form 540-ES, Section B).

The threshold drops to $250 for a taxpayer who files married or RDP separately. The lower bar catches a surviving spouse who has not yet resumed a joint return, and a couple that has moved to separate returns for asset-protection reasons.

A new California resident does not owe estimated tax for the first partial year if the resident did not have a California tax liability in the prior year. That exception, in Section B of the 540-ES instructions, protects a family that moved to San Diego or Sacramento mid-year with no California source income in the year before.

The California safe harbor under R and TC Section 19136

The safe-harbor tests decide whether an underpayment penalty applies. The 540-ES worksheet asks the taxpayer to project the required annual payment, which is the smaller of two amounts.

The first amount is 90 percent of the 2025 California tax shown on the 2025 return, including the Alternative Minimum Tax if any. The second amount is 100 percent of the 2024 California tax shown on the 2024 return, including AMT (source: FTB, 2025 Instructions for Form 540-ES, Section B).

Two adjustments raise the bar for higher-income households. Both matter for retirees with a large one-time distribution or a large capital gain.

Adjustment 1. If the 2024 California adjusted gross income was more than $150,000 (or $75,000 if married or RDP filing separately), the prior-year prong rises to 110 percent of the 2024 tax. The 90 percent current-year prong stays the same.

Adjustment 2. If the 2025 California adjusted gross income is $1,000,000 or more (or $500,000 if married or RDP filing separately), only the 90 percent current-year prong is available. The prior-year escape hatch closes at that threshold (source: FTB, 2025 Instructions for Form 540-ES, Section C).

Section 19136(c)(2) sets a de minimis floor. No underpayment addition to tax applies if the required California tax is less than $500 ($250 for a separate return) after credits, which is why the same figures appear as both the trigger and the safe-harbor floor.

2025 Form 540-ES due dates and California installment split

California does not follow the four-equal-quarters pattern most people remember from federal Form 1040-ES. Section A of the 540-ES instructions sets an uneven split. Installments due are 30 percent of the required annual payment for the 1st, 40 percent for the 2nd, no installment for the 3rd, and 30 percent for the 4th (source: FTB, 2025 Instructions for Form 540-ES, Section A).

The uneven split is often the reason a retiree who copies the federal amounts to the California voucher underpays by June and receives an FTB notice the following spring.

Source: FTB, 2025 Instructions for Form 540-ES, Sections A (Installment Payments) and D (When to Make Your Estimated Tax Payments), checked August 2026 at ftb.ca.gov/forms/2025/2025-540-es-instructions.html.

The percentages are of the required annual payment, not of the projected tax bill. A taxpayer who owes $8,000 for the year pays $2,400 in April, $3,200 in June, zero in September, and $2,400 in January. That schedule stays the same whether the taxpayer uses the current-year 90 percent prong or the prior-year 100 or 110 percent prong to compute the required annual payment.

What retirement income counts on the 540-ES worksheet

FTB Publication 1005 sets the California treatment of pension, annuity, and IRA income. The California taxable amount tracks the federal taxable amount for most retirees, with adjustments for a few narrow rules that differ from federal law (source: FTB Publication 1005, Pension and Annuity Guidelines, 2024).

Ordinary California income, taxed at the regular Section 17041 brackets, includes:

• Distributions from a private pension or annuity.
• Distributions from a 401(k), 403(b), or governmental 457(b) plan.
• Distributions from a traditional IRA to the extent the contributions were federally deductible.
• Distributions from a SEP-IRA or SIMPLE IRA.
• Roth IRA distributions that fail the federal qualified-distribution test.

Not ordinary California income, per FTB Publication 1005 and the Schedule CA (540) subtraction lines:

• Social Security benefits. Under Revenue and Taxation Code Section 17087, Section 86 of the Internal Revenue Code does not apply for California purposes, so Social Security is excluded from California income (source: California Revenue and Taxation Code Section 17087).
• Tier 1 Railroad Retirement benefits, treated the same way by Section 17087.
• Qualified Roth IRA distributions that meet the federal five-year and age-59-and-a-half tests.
• Basis recovery on nondeductible IRA contributions, computed the same way as on federal Form 8606.

These distinctions matter for the 540-ES worksheet. Projecting Social Security as taxable California income overstates the required annual payment. Projecting a full IRA distribution as taxable ignores the nondeductible-basis carve-out and can also overstate the payment.

The Mental Health Services Tax on income over $1,000,000

The California Mental Health Services Tax, added by Proposition 63 in 2004, is codified at Revenue and Taxation Code Section 17043. It imposes an additional tax at the rate of 1 percent on the portion of taxable income that exceeds $1,000,000 for taxable years beginning on or after January 1, 2005 (source: California Revenue and Taxation Code Section 17043).

Section 17043 applies to individuals, not to entities. It layers on top of the regular Section 17041 brackets. A single filer with $1,200,000 of California taxable income pays the regular tax on the whole amount and an extra 1 percent, or $2,000, on the $200,000 above the $1,000,000 threshold.

The one-year lookback in the safe-harbor test cuts the wrong way when the prior year was quiet and the current year is a spike. A retiree who sells appreciated stock, exercises non-qualified options, or takes a lump-sum distribution can cross the $1,000,000 line in a single year while the prior year was well below it.

Section C of the 540-ES instructions closes the prior-year prong for that taxpayer. Once 2025 California AGI equals or exceeds $1,000,000, the required annual payment is 90 percent of the 2025 California tax, computed with the Mental Health Services Tax included.

Withholding compared with quarterly estimates

California withholding on pension and IRA distributions is not required by default. A payer will only withhold if the recipient sends in a Form DE 4P (for pensions) or elects a percentage on the plan distribution form.

Increasing withholding is often simpler than filing four vouchers. The 540-ES instructions specifically point to Employment Development Department Form DE 4 as the tool to raise California withholding on a wage or pension source, and note that DE 4 differs from federal Form W-4.

Withholding is treated as if paid evenly across the year for underpayment-penalty purposes. A taxpayer who withholds enough from a December IRA distribution to cover the whole California tax owed for the year avoids the uneven-installment penalty entirely.

Quarterly estimates are treated on the date paid. A late 2nd installment cannot be cured by a large 4th installment, because Sections 19136 and 6654 test the cumulative payments installment by installment.

Mandatory electronic payments and the 1 percent noncompliance penalty

California requires all subsequent payments to be electronic once a taxpayer crosses one of two thresholds. The first threshold is any single estimate or extension payment over $20,000. The second is an original tax return with a total tax liability over $80,000 (source: FTB, 2025 Instructions for Form 540-ES, Mandatory Electronic Payments).

The e-pay requirement latches once. It carries into future tax years and applies to all subsequent payments, regardless of amount, tax type, or year. A retiree who wrote a $22,000 April check in 2024 must pay electronically from the June 2024 installment forward, even if later installments are smaller.

The penalty for a paper payment after the requirement latches is 1 percent of the payment. The FTB accepts three electronic options: Web Pay at ftb.ca.gov/e-pay, an electronic funds withdrawal (EFW) initiated through tax software, or a credit card payment.

How to compute the four quarterly payments

The steps below outline how a California retiree walks through the 540-ES worksheet. They describe the general mechanics; they are not tax advice, and a California CPA should confirm each figure for your specific facts.

1. Project 2025 California taxable income. Start with the projected federal taxable income for 2025. Subtract Social Security and Tier 1 Railroad Retirement benefits per Revenue and Taxation Code Section 17087. Add any pension, IRA, or 401(k) distribution amounts. Apply the Schedule CA (540) adjustments listed in FTB Publication 1005.
2. Compute the projected 2025 California tax. Apply the Section 17041 marginal brackets to projected California taxable income. Add the 1 percent Mental Health Services Tax under Section 17043 on any amount above $1,000,000. Subtract nonrefundable credits allowed under Part 10.
3. Look up the 2024 California tax. Copy the total tax from the 2024 Form 540 (line 65 for tax year 2024) to the worksheet. This is the second prong of the safe harbor.
4. Pick the correct prior-year percentage. Use 100 percent of the 2024 tax if 2024 California AGI was $150,000 or less ($75,000 or less if married or RDP filing separately). Use 110 percent if 2024 California AGI was above that threshold.
5. Test the $1,000,000 override. If projected 2025 California AGI is $1,000,000 or more ($500,000 or more if married or RDP filing separately), drop the prior-year prong entirely. Use only the 90 percent current-year figure.
6. Set the required annual payment. The required annual payment is the smaller of 90 percent of the projected 2025 California tax and the applicable prior-year figure.
7. Subtract projected California withholding. Reduce the required annual payment by the withholding you expect from pensions, IRA distributions, and any wages. The remainder is the total to send as four vouchers.
8. Split into the California installments. Multiply the remainder by 30 percent for the April 15 voucher, 40 percent for the June 16 voucher, 0 percent for the September installment (no payment), and 30 percent for the January 15 voucher.
9. Pay each installment on time. Use Web Pay at ftb.ca.gov/e-pay if a prior payment ever exceeded $20,000 or a prior return showed tax over $80,000. Otherwise, a paper voucher mailed with a check is still accepted.
10. Recompute mid-year if a large income event occurs. A Roth conversion, a lump-sum distribution, or a stock sale can move the required annual payment. Rerun the worksheet and update the remaining installments before the next due date.

Consult your CPA before you finalize the projection. A missed step on Schedule CA subtractions, a missed credit, or a misread of the $1,000,000 threshold can move a payment by thousands of dollars.

Underpayment penalty exposure and Form 5805

The underpayment addition to tax is computed on Form 5805, Underpayment of Estimated Tax by Individuals and Fiduciaries. Section 19136(b) points to the interest rate set under Section 19521, not the federal Section 6621 rate.

The California underpayment rate has floated with federal short-term rates for the past several years. A retiree who missed the April installment by two months on a $2,000 shortfall generally pays a modest penalty. A retiree who skipped the April installment entirely on a $20,000 shortfall can face several hundred dollars in penalty and interest by year end.

Section 19136(g) waives the addition to tax when the underpayment was created or increased by a law enacted during the year of the underpayment. Late-session California tax legislation is rare, so this waiver applies only in unusual years.

A taxpayer who annualizes income (Form 5805 Part III) can reduce the penalty when income was concentrated in a later quarter. That is the correct answer for a retiree whose only large-income event was a September Roth conversion.

When quarterly estimates are the wrong answer

Quarterly 540-ES payments are not the right fit for every California retiree. A few situations point to a different tool.

• A retiree with only Social Security and Tier 1 Railroad Retirement. California excludes both, so total California taxable income is likely zero. No 540-ES is required, and no Form 540 filing is required if the federal filing test is also not met.
• A retiree with predictable pension withholding above the safe harbor. Withholding is treated as paid evenly. A CalPERS or CalSTRS retiree who has enough California withholding on the pension checks does not need vouchers.
• A retiree in the first partial year of California residency. Section B of the 540-ES instructions relieves a new resident with no prior-year California tax liability. Vouchers can wait until the second full year.
• A retiree with a one-time large event best handled by withholding. Elect a large California withholding on the December distribution or Roth conversion instead of chasing four uneven installments.
• A retiree who has already met the prior-year prong through withholding. If the 2025 withholding already equals 100 percent (or 110 percent) of the 2024 California tax, the safe harbor is satisfied even if a large 2025 event pushes the current-year tax higher.

None of these situations replaces professional advice. A California CPA should confirm the specific numbers before you skip a payment.

California estimated tax for retirees, answered

Do California retirees have to pay estimated tax on pension and IRA income?

Only if withholding and credits do not cover the projected California tax. Section 19136 requires estimated payments when the taxpayer expects to owe at least $500 in California tax ($250 if married or RDP filing separately) after withholding. A retiree who has enough California withholding on the pension or IRA distribution does not need to file Form 540-ES. Consult your CPA for your specific numbers.

When are the 2025 Form 540-ES installments due?

The 2025 due dates are April 15, June 16, September 15, and January 15, 2026, per Section D of the 2025 Instructions for Form 540-ES. California splits the required annual payment as 30 percent, 40 percent, 0 percent, and 30 percent, not four equal quarters.

Why is the California split 30, 40, 0, 30 instead of four equal quarters?

California adopted the uneven split in the General Fund Cash Flow Adjustment enacted in 2009 and codified in the 540-ES instructions. Section A of the current instructions restates the split. The higher first two installments accelerate cash into the state and shift the third installment out of the fiscal year.

Does California tax Social Security or Railroad Retirement?

No. Revenue and Taxation Code Section 17087 excludes both from California income by directing that Section 86 of the Internal Revenue Code (Social Security) and Section 72(r) (Tier 2 Railroad Retirement) do not apply. Foreign social security is still taxable by California as annuity income.

Does the Mental Health Services Tax affect the 540-ES worksheet?

Yes, once projected California taxable income exceeds $1,000,000. Revenue and Taxation Code Section 17043 imposes an additional 1 percent on the amount above that threshold. The 540-ES worksheet must include the surtax in the projected tax, and the $1,000,000 California AGI cap in Section C of the instructions closes the prior-year prong of the safe harbor for that year.

What is the underpayment penalty if I miss a California installment?

The addition to tax is computed on Form 5805 using the interest rate set under Revenue and Taxation Code Section 19521. The rate has moved with federal short-term rates for the past several years. The penalty runs from the missed due date to the earlier of the actual payment date or the return due date. Section 19136(c)(2) waives the penalty when the total required California tax is less than $500 ($250 for a separate return).

Can I make the four California payments electronically?

Yes. Web Pay at ftb.ca.gov/e-pay accepts direct debit from a checking or savings account without a service fee. Electronic funds withdrawal through tax software and credit-card payments are also accepted. Electronic payment becomes mandatory once a single estimate or extension payment exceeds $20,000, or the original return shows total tax above $80,000.

Should I use withholding or quarterly vouchers?

Withholding is often simpler for a California retiree because it is treated as paid evenly across the year for penalty purposes. A DE 4P election on a pension source or a percentage election on an IRA distribution can eliminate the need for four vouchers. Consult your CPA on the mix that fits your projected 2025 California tax and cash flow.