How Much Should You Defer Into Deferred Compensation? A Step-by-Step Approach

A practical way to decide how much to defer is to start from what you can afford to lock away: fund your 401(k) and HSA first, keep an emergency fund, and make sure every paycheck still covers your other deductions and taxes. Then aim the deferral at the slice of income taxed at your top marginal rate, and stop before your payout years or your exposure to one employer start to work against you.

There is no single right percentage. The amount that makes sense depends on your cash needs, your tax brackets now and later, and how much of your wealth already depends on your employer.

This guide assumes you have already decided that deferring makes sense for you. If you have not, start with is deferred compensation worth it. It covers private-employer non-qualified deferred compensation (NQDC) plans under Section 409A, not governmental 457(b) plans.

Step 1: Fund your 401(k) and HSA first

Most people treat an NQDC plan as the place for savings beyond their qualified accounts, not instead of them. A 401(k) is held in trust, can be rolled over and often includes a match. An NQDC balance is an unsecured promise from your employer.

For 2026, the 401(k) elective deferral limit is $24,500, plus an $8,000 catch-up at age 50 or older, or $11,250 at ages 60 through 63. The 2027 limits had not been announced when this guide was updated; industry projections put the base limit at $25,500.

If you have an eligible high-deductible health plan, an HSA is often funded before NQDC too. Also check whether deferring into NQDC reduces the pay your 401(k) match is calculated on. See NQDC vs 401(k) for a full comparison.

Step 2: Set a cash-flow floor and an emergency fund

An NQDC deferral is hard to undo. Once the plan year begins, your salary election is generally irrevocable (26 U.S.C. §409A). Before the payout date, money comes out only for an unforeseeable emergency, and only to the extent you cannot cover the need through insurance, selling other assets or stopping deferrals (Treas. Reg. §1.409A-3).

So set a floor first:

• Add up your fixed spending, savings goals and expected large expenses for the year.
• Keep an emergency fund outside the plan that you are comfortable with.
• Plan for known costs before the payout date, such as tuition or a home purchase, which generally do not qualify as emergencies.

Whatever is left above that floor is the most you could reasonably defer.

Step 3: Make sure your paychecks can carry the deferral

Your deferral comes out of the same paycheck as your 401(k) contributions, health premiums, payroll taxes and income tax withholding. Social Security and Medicare tax is still due on the deferred pay in the year you defer, under the FICA special timing rule. If the deferral is too large, the paycheck may not cover everything else.

Here is an illustrative, simplified example. You earn a $300,000 salary paid in 24 semi-monthly paychecks of $12,500. You contribute the 2026 401(k) maximum ($1,020.83 per paycheck) and pay $400 per paycheck in pre-tax health premiums and HSA contributions. Early in the year, before you reach the Social Security wage base, FICA is 7.65% of $12,100, or $925.65.

At 60%, about $2,650 is left to cover federal and state income tax withholding on roughly $3,580 of taxable wages, and then your spending. Paychecks get larger later in the year once your wages pass the Social Security wage base ($184,500 in 2026 and $192,300 in 2027), so the early-year paychecks are usually the tightest. Some plans cap deferral percentages partly for this reason.

Step 4: Target the income taxed at your top rate

Deferring removes income from the top of your tax return first. The first dollars you defer save your highest marginal rate. Once you defer enough to drop into the next bracket down, each additional dollar saves less.

That suggests a target: defer roughly the slice of income that sits in your top federal bracket, and in your top state bracket if your state has graduated rates.

Here is an illustrative, simplified example. Suppose your taxable income is $70,000 above the point where your top federal bracket begins, and you expect to be in a lower bracket in your payout years. Deferring up to $70,000 saves your top rate on every dollar. Deferring more saves only the next-lower rate on the extra amount, which narrows the gap with what you will pay later.

Check the payout years too

The deferred money has to come out eventually, and it adds to whatever else you earn then. Suppose you defer $70,000 a year for eight years. That is $560,000 before investment growth. Paid over 10 annual installments, it adds about $56,000 a year, plus earnings, on top of any Social Security, pension, IRA withdrawals or a spouse's salary.

If those payouts would put you back into the same bracket you deferred out of, you have mostly postponed the tax rather than reduced it. A longer installment schedule can spread the income. See lump sum vs. installments and how deferred compensation is taxed.

Step 5: Limit how much rides on one employer

Your NQDC balance is an unsecured claim against your employer. In a bankruptcy, you stand in line with other unsecured creditors (IRS Publication 5528), and a rabbi trust does not protect you if the company becomes insolvent (IRS Notice 2000-56).

It can help to think about the share of your net worth that depends on one company: your NQDC balance, company stock, unvested equity awards and the salary itself. There is no official limit. You might set a personal ceiling that reflects how strong your employer's finances look and how much else you own. Ways to limit the balance at risk include:

• Deferring less as your NQDC balance grows
• Choosing payout dates that release money while you still work, where your plan allows specified-date payouts
• Choosing shorter installment schedules, at the cost of less tax spreading

The NQDC risks guide explains the credit risk in more detail.

Plan caps

The tax code sets no dollar limit on NQDC deferrals. Your plan sets its own limits, usually as a percentage of salary and of bonus. Read your enrollment materials for the caps that apply to you.

Salary vs. bonus deferrals

Many plans let you set separate percentages for salary and bonus. The two behave differently.

• Timing. Salary elections are generally due by December 31 of the year before you earn the pay. A performance-based bonus measured over at least 12 months can generally be elected as late as 6 months before the period ends, if your plan allows it and the amount is not yet readily ascertainable. For a calendar-2027 bonus, that can be June 30, 2027 (Treas. Reg. §1.409A-2).
• Cash flow. A bonus deferral does not shrink your regular paychecks, so it is easier to absorb.
• Uncertainty. A bonus can be smaller than you expected. A percentage election scales down with it, while your spending may not.
• Bracket fit. A bonus sits on top of your salary, so it is often taxed at your top rate.

If you are newly eligible, you generally have 30 days to elect, but only for pay earned after the election. The 409A election rules guide has the full calendar.

Your plan document governs what you can elect, and a qualified tax or financial professional can help you set the amount. To test different percentages against your own brackets, states and payout schedule, the free NQDC calculator includes an optimizer that searches deferral percentages and payout schedules.

Frequently asked questions

How much should I defer into deferred compensation?

There is no single answer. A common approach is to fund your 401(k) and HSA first, keep an emergency fund, confirm your paychecks can absorb the deferral, then defer roughly the income taxed at your top marginal rate. From there, adjust for your payout-year income and how much of your wealth already depends on your employer.

Is there a maximum I can defer into an NQDC plan?

The IRS sets no dollar limit on elective NQDC deferrals. Each plan sets its own limits, usually as a percentage of salary and bonus. Your enrollment materials list the caps.

Should I defer my salary or my bonus?

It depends on your cash flow. Deferring bonus leaves your paychecks unchanged and often targets income taxed at your top rate. Deferring salary is steadier but reduces every paycheck, and the election is due earlier.

Can I change or stop my deferral during the year?

Generally no. Your election becomes irrevocable once the plan year starts. A plan may let deferrals stop in an unforeseeable emergency, and you can choose a different amount for the next year by that year's election deadline.

How much of my net worth should be in deferred compensation?

There is no rule, but it is worth limiting how much of your net worth depends on a single employer. Count your NQDC balance alongside company stock, unvested equity and your job itself. The weaker your employer's finances look, the more cautious you may want to be.