Federal tax delinquency is rising: a retiree’s guide

1. What the audit found

In mid-May 2026, the Treasury Inspector General for Tax Administration released a report with an uncomfortable headline for the federal community: federal tax delinquency is rising, and it’s rising among retirees as well as current employees.

The numbers, covering fiscal years 2021 through 2024:

• The delinquency rate among federal employees and retirees climbed from 4.9% to 6.9% — a roughly 41% relative increase.
• The number of delinquent current and retired federal personnel rose by 43%, to more than 571,000.
• The total owed grew roughly 32%, to about $6.3 billion — an increase of more than $1.5 billion.
• Around 50,000 federal civilian employees failed to file a return for multiple years, and 122 had not filed for eight or more years — cases TIGTA referred to IRS Criminal Investigation.

Part of the rise has a benign explanation: the IRS paused several collection programs during the pandemic, including levy programs and the Automated Substitute for Return process, and delinquencies that would normally have been resolved instead lingered and accumulated. The IRS has since resumed those programs and expects rates to improve.

But the larger point stands. Federal tax delinquency is more common than the “federal employees pay their taxes diligently” assumption suggests — and a meaningful share of those 571,000 are retirees. For a retiree, the cause is rarely a refusal to pay. It’s almost always something quieter, and entirely preventable.

2. Why retirees are especially exposed

Here’s the part that matters if you’re a federal retiree or about to become one: retirement is exactly the transition that creates accidental tax delinquency.

During your working years, tax compliance was largely automatic. Your agency withheld federal tax from every paycheck based on your W-4. You may have owed a little or gotten a small refund, but the system kept you roughly square without much thought.

Retirement dismantles that automatic system and replaces it with three separate income streams, each handling withholding differently — and no single payer that sees your whole picture:

• Your FERS or CSRS annuity. OPM withholds federal tax based on the Form W-4P you filed with your retirement paperwork. If that form was based on your final working year and never updated, the withholding can be wrong from day one.
• Social Security. This is the big one. The Social Security Administration withholds nothing by default — not a cent — unless you specifically file a Form W-4V requesting it. A retiree who assumes “it’s being handled” is, on this stream, having nothing withheld at all.
• Your TSP. The TSP withholds a flat 20% on many Traditional withdrawals, and varying amounts on installment payments. That flat rate may be far more or far less than your actual tax rate.

Three streams, three withholding behaviors, no coordination. A career employee who never thought about withholding becomes a retiree whose withholding no longer matches what they owe — and the gap shows up as a balance due at filing, or worse, a balance that goes unpaid.

Almost no federal retiree sets out to be tax delinquent. They become delinquent because retirement quietly broke the withholding system that kept them compliant for thirty years — and nobody told them.

3. The withholding fix

The good news: the single biggest cause of retiree tax delinquency is the easiest to fix. It’s a once-a-year check.

Step one: total your retirement income. Add up your annuity, your Social Security, and your expected TSP withdrawals for the year. This is your gross retirement income.

Step two: estimate the tax. Federal retirement income is taxable and reasonably predictable — the pension is largely taxable, up to 85% of Social Security is taxable, and Traditional TSP withdrawals are fully taxable. Estimating the bill is straightforward once you know how each stream is treated. For the full method, see how retirement income is taxed: the federal employee version.

Step three: compare it to what’s actually being withheld, and close the gap. You have three levers:

Step four: if you still have a gap, make quarterly estimated payments. If withholding can’t fully cover what you owe — common for retirees with significant investment income or large TSP withdrawals — the IRS expects quarterly estimated tax payments. Missing those can trigger an underpayment penalty even if you pay in full at filing.

4. If you’re already behind

Some readers will recognize themselves in the 571,000. If you’ve fallen behind on federal taxes, the worst response is to keep not opening the mail. The situation is fixable, and the IRS has structured paths for exactly this.

File the return even if you can’t pay. Filing and paying are separate obligations. Filing on time — or filing a late return as soon as possible — stops the larger failure-to-file penalty, which is far steeper than the failure-to-pay penalty. Unfiled returns are the most serious category in the audit, and the report noted the IRS referred its most extreme nonfiler cases for criminal review. File first, then deal with payment.

Use an IRS payment plan. The IRS offers installment agreements that let you pay a balance over time. For many retirees, a monthly payment plan turns an unmanageable lump sum into something workable.

Fix the withholding at the same time. Resolving last year’s balance does nothing if this year’s withholding is still wrong — you’ll just be back next April. Clearing the back balance and correcting the W-4P, W-4V, and TSP withholding are two halves of the same fix.

The audit’s headline is a number — 571,000, $6.3 billion. But behind it, for most retirees, is a solvable administrative problem, not a financial catastrophe. Run the once-a-year withholding check, file every return on time, and the odds of becoming part of next year’s statistic drop close to zero.