SIMPLE IRA Calculator
The formula
What the simple balance tells you
Prices the small-employer plan that trades 401(k) limits for simplicity: mandatory contributions, no testing, no filing beyond an election, and instant 100% vesting.
Calculation: SIMPLE 3% dollar-for-dollar match + deferrals grown; 2% nonelective alternative for low deferral. Enter your inputs and every substitution is shown below the result.
Reading the result
Choose the 2% nonelective when most employees would not defer — the employer pays regardless and everyone still gets a retirement dollar.
Rules of thumb: 2026 deferral $16,000; employer 3% match or 2% nonelective; ≤100-employee eligibility
Limitations and best practice
Missed-deposit penalties were made correctable but still real under SECURE 2.0; and withdrawing from a SIMPLE within 2 years before 59½ triggers a 25% early-withdrawal rate, not 10%.
This calculator gives an estimate based on standard formulas; it is not professional financial, medical, legal or engineering advice. Verify anything you plan to act on with a qualified professional and your own records.
Frequently asked questions
Can a SIMPLE IRA and 401(k) coexist?
Is the match vested?
Source & methodology
IRC §408(p); SECURE 2.0 deposit-correction rules.
How SIMPLE IRA works — and what your result really means
You are here because you need a specific number, and you want to see how it was produced before you rely on it. There are plenty of pages about SIMPLE IRA; almost none of them show the working. This one does: the formula, every input, a fully computed example, and a sensitivity analysis calculated live from this engine’s own defaults.
In Retirement Planning the same quantity is often quoted under two or three different conventions. The formula printed above fixes one convention and applies it consistently, which is what makes results from this page comparable with each other.
Most confusion about SIMPLE IRA comes from mixing up the input you control with the input you merely observe. The formula treats them identically, but your decisions should not: one deserves measurement, the other deserves a defensible estimate.
What makes a calculation page trustworthy is that its copy is derived from its own arithmetic: here SIMPLE balance at year 17 = $543,263, recomputed every time a field changes, and the sensitivity section ranks the inputs that move the result — Years first, at ≈20.4 % of the headline for a ten-percent error either way in that input. Read the sections in order and you will be able to reproduce every figure by hand.
Every input in SIMPLE IRA, and what it does to the answer
One formula, published in full: SIMPLE 3% dollar-for-dollar match + deferrals grown; 2% nonelective alternative for low deferral. Anything you can read, you can reproduce in a spreadsheet, and that reproducibility is the whole point of printing it rather than hiding it behind a button.
Annual employee deferral ($) (example value 15,268) is a plain measured quantity — the unit shown in the label is the unit the formula expects. If you are unsure what belongs in this field, look at the printed steps: the substitution shows exactly how the engine uses it.
Employee compensation ($) (example value 67,594) is a plain measured quantity — the unit shown in the label is the unit the formula expects. The example value is there to demonstrate the mechanics, not to describe your situation — overwrite it.
Employer match (% up to) (example value 3) is a measured number in the unit named by the label; the formula does not convert for you. Check the convention first: if the source says “6.5 % per year”, type 6.5 and let the formula do the rest.
Years (example value 17) is a quantity rather than a category — precision here is cheap and worth having. Use the value as of today, not as of the last time you looked — time fields drift silently.
Annual return (%) (example value 7) is a quantity rather than a category — precision here is cheap and worth having. Check the convention first: if the source says “6.5 % per year”, type 6.5 and let the formula do the rest.
SIMPLE IRA on the example inputs: the complete substitution
Abstract formulas are hard to trust, so here is the complete substitution using the default inputs, written the way an examiner would want it. Starting figures: Annual employee deferral ($), Employee compensation ($), Employer match (% up to), Years. The computed SIMPLE balance at year 17 comes out at $543,263, which the interpretation band labels “The SIMPLE is the 100%-vested, no-testing alternative: at a 3% match you reach $17,296/yr of total contributions without filing anything beyond a plan election”.
- Match = min($15,268 deferral, 3% of $67,594) = $2,028
- Total $17,296/yr at 6.5% × 17y = $543,263
- SIMPLE limit is $16,000 of deferral (2026) + $3,500 age catch-up — half a 401(k) track
Employer match elected — $2,027.82. If your inputs change, this is usually the first companion figure to move.
2% nonelective alternative — $1,351.88. This is the number experienced users quote when the headline alone would mislead.
Total annual contribution — $17,296. If your inputs change, this is usually the first companion figure to move.
First-year tax saving at 22% — $3,805.08. This is the number experienced users quote when the headline alone would mislead.
Keep this worked example open while you enter your own figures: matching the shape of the substitution is the fastest way to spot a unit or convention mistake.
How far SIMPLE IRA can reasonably move
Single-point answers invite false confidence, so the same engine was run across a band around the input that matters most here. Each row is a full recalculation of SIMPLE IRA, not an interpolation.
| Years setting | SIMPLE balance at year 17 |
|---|---|
| 80 % of the example value | $400,955 |
| 90 % of the example value | $492,810 |
| example inputs | $543,263 |
| 110 % of the example value | $654,220 |
| 120 % of the example value | $780,070 |
That spread — $400,955 at the low end, $780,070 at the high — is what a careful read of SIMPLE IRA looks like: a band you can state out loud, with the reason for each edge. Reproduce it in the form above by editing Years alone; the substitution steps will follow your figures exactly.
What actually moves your SIMPLE IRA
Generic advice says “it depends on your inputs”; this section says exactly how much. Each field was perturbed by ±10 % in isolation and the SIMPLE balance at year 17 recomputed, so the ranking below is measured rather than asserted. Read it as a map of where SIMPLE IRA is fragile — drawn for the example inputs, which is the map you want when deciding what to measure carefully.
- Years +10 % → SIMPLE IRA = $654,220 · −10 % → $492,810 (the SIMPLE balance at year 17 shifts ≈20.4 %)
- Annual employee deferral: ten percent up gives $591,220, ten percent down gives $495,306 — ≈8.8 % of the SIMPLE balance at year 17 either way
- Annual return: ten percent up gives $579,288, ten percent down gives $509,710 — ≈6.6 % of the SIMPLE balance at year 17 either way
- Nudge Employee compensation by ±10 % and SIMPLE IRA lands between $536,893 and $549,632 (sensitivity ≈1.2 %)
- Employer match +10 % → SIMPLE IRA = $549,632 · −10 % → $536,893 (the SIMPLE balance at year 17 shifts ≈1.2 %)
Years is the dominant lever here: ten percent either way moves the result by about 20.4 %, from $492,810 to $654,220. Spend your verification effort there first, and treat Annual employee deferral as the second priority (≈8.8 % per ten percent). The remaining fields can sit at safe defaults without materially changing the answer — knowing which is which is what separates a careful calculation from an anxious one.
Reading the result: bands, zones and thresholds
The value above only becomes useful the moment you know what it is being measured against. The default case lands in the “The SIMPLE is the 100%-vested, no-testing alternative: at a 3% match you reach $17,296/yr of total contributions without filing anything beyond a plan election” band, and bands are deliberately wide because real situations overlap. The sensitivity list shows how far a modest input error moves you along that ladder: for Years, ±10 % covers $492,810 to $654,220. The practical reading rules: compare against your own history before comparing against other people; treat band boundaries as zones, not walls — one point on the wrong side of a threshold rarely changes a real outcome; and when a companion output contradicts the headline, believe the pair.
Where SIMPLE IRA sits next to similar measures: this tool answers “how much is the SIMPLE IRA”, while the related calculators answer “what do I do about it”. Reading the result alone tends to over-weight a single snapshot; pairing it with the companion tools above turns the number into a decision.
Common mistakes with SIMPLE IRA (and the fix)
Missed-deposit penalties were made correctable but still real under SECURE 2.0; and withdrawing from a SIMPLE within 2 years before 59½ triggers a 25% early-withdrawal rate, not 10%. This calculator gives an estimate based on standard formulas; it is not professional financial, medical, legal or engineering advice. Verify anything you plan to act on with a qualified professional and your own records.
Reporting the headline and quietly discarding Employer match elected. The companions are where the shape of the trade-off survives the rounding.
This model has its own particular trap: Years carries ≈20.4 % of the response per ten percent of error, so effort spent elsewhere is largely decorative.
The subtlest error is answering the wrong question precisely. Confirm that SIMPLE balance at year 17 is actually the quantity your decision needs — the arithmetic is flawless either way, which is what makes the mistake invisible.
A quick check for any SIMPLE IRA figure
- Check that every field the formula needs actually arrived from a document, not from recollection.
- Verify each input against its original source document, not memory.
- Check Years before anything else: it is the measured dominant input, ≈20.4 % of SIMPLE IRA per ten percent.
- Note the date and the inputs beside the number so the figure can be audited later.
- Recompute once with the dominant input deliberately set low, and see whether the decision changes.
- Repeat the ±10 % test on the inputs that matter and see whether the decision — not just the number — still holds.
Step by step: getting a trustworthy SIMPLE IRA out of this tool
Using a calculator well sounds trivial, but the difference between a decision-grade figure and a throwaway one lives entirely in the routine. The routine for SIMPLE IRA takes a minute to learn and applies to every input above.
Step 1 — collect, then type. Everything this tool asks for is listed above (annual employee deferral ($), employee compensation ($), employer match (% up to), years, annual return (%)). Pull each figure from something you can point at — paperwork, a dashboard, a label — before touching a field. Guesswork at the input stage cannot be repaired at the interpretation stage. Estimates improve most when the worst case is written down in ink.
Step 2 — enter the conservative case first. Resist the flattering scenario. Type the inputs you would defend in front of a sceptical reader, read the SIMPLE balance at year 17 ($543,263 for the example values), and note the verdict band. Note the assumption you are least sure about; that is where the real risk lives.
Step 3 — measure what deserves measuring. The ranked levers above tell you where a careful figure pays off. Everything else can stay approximate, which is a licence to stop hunting for data you do not need. Repeating a calculation with the same numbers proves only that the arithmetic is reliable — which is worth knowing.
Step 4 — compute a corridor, not a point. Three runs — worst, likely, best — turn SIMPLE IRA from a snapshot into a range. Plan against the pessimistic end and treat the optimistic end as the upside story. A figure nobody can reproduce is a figure nobody will act on twice.
Step 5 — write the one-line memo. “SIMPLE balance at year 17 = $543,263 on this date, from these inputs.” That line is the entire deliverable; everything else on this page is how you earned the right to write it. A figure nobody can reproduce is a figure nobody will act on twice.
Who actually uses SIMPLE IRA — and when
Numbers earn their keep in conversations, and SIMPLE IRA is no exception. In Retirement Planning discussions around Retirement Accounts, this figure decides whether an option stays on the table: it converts an opinionated debate into an arithmetic one, and arithmetic is the only referee both sides accept. If the answer changes your behaviour, it deserves a second run with different assumptions.
The audience for this page is people who need one trustworthy number before their next decision. In professional Retirement Accounts practice the pattern is always the same — screen with SIMPLE IRA, then invest slow analysis only in whatever survives the screen. The test of a good estimate is not that it feels right but that it changes what you do.
Nothing here is stored or transmitted, so the habit of checking is free: open the page, re-enter current figures, compare with the number you saved last time. Write the assumptions in the same file as the result, and future arguments take minutes instead of meetings.
SIMPLE IRA — frequently asked questions
What affects SIMPLE IRA the most?
The short answer: Years. The longer answer is the sensitivity table on this page, where every numeric input was probed by ten percent and the SIMPLE balance at year 17 recalculated — Years moved it furthest, by roughly 20.4 % ($492,810 to $654,220).
Which matters more: annual employee deferral or years?
Years, by a factor of about 2.3. Concretely: ten percent on Years is worth ≈20.4 % of SIMPLE IRA, the same nudge on Annual employee deferral only ≈8.8 %. That ranking is re-computed for each page from that page’s own defaults.
What is a typical SIMPLE IRA?
With the example inputs on this page the result is $543,263, labelled “The SIMPLE is the 100%-vested, no-testing alternative: at a 3% match you reach $17,296/yr of total contributions without filing anything beyond a plan election”. “Typical” varies with situation, which is why every result here ships with its verdict band and its sensitivity list: they turn one figure into a range you can locate yourself inside.
How do I calculate SIMPLE IRA by hand?
Three steps: write the formula (SIMPLE 3% dollar-for-dollar match + deferrals grown; 2% nonelective alternative for low deferral), insert your values, and simplify. The worked example section shows exactly that chain for the default inputs; replicating it once on paper teaches you more about SIMPLE IRA than any number of calculator runs.
What happens to SIMPLE IRA if years changes by 10 %?
On these inputs a ±10 % change in years takes SIMPLE IRA to $654,220 against the $543,263 example — around 20.4 % of the headline. The same test on every other field is in the sensitivity section.
Is the SIMPLE IRA result of $543,263 good or bad?
Neither, on its own — the label “The SIMPLE is the 100%-vested, no-testing alternative: at a 3% match you reach $17,296/yr of total contributions without filing anything beyond a plan election” is the band this figure falls in for the example inputs, and your own inputs will place you elsewhere on the same ladder. Judge the number against your history and your alternatives, and remember that a ten-percent error in Years alone moves it by ≈20.4 %.
How much is enough for retirement (per SIMPLE IRA)?
Enough is the point where SIMPLE IRA stops changing with extra input — the plateau. Run the tool with your age, savings and target income; the verdict band marks the plateau region and the companion outputs show the cost of arriving later.
What affects SIMPLE IRA the most?
Sensitivity depends on where you start, but the inputs Annual employee deferral ($) and Employee compensation ($) typically move SIMPLE IRA further than the rest because they enter the formula multiplicatively. If you can only measure two things well, measure those and hold the others at conservative defaults.
Can a SIMPLE IRA and 401(k) coexist?
Not in the same year for the same employer; the SIMPLE cap also restricts 401(k)-style deferrals in overlapping years.
Is the match vested?
Yes — SIMPLE employer contributions are always 100% vested immediately.
Does this SIMPLE IRA tool store my numbers?
No. The entire calculation runs in your browser session; nothing entered above is transmitted or saved, which is the correct behaviour for sensitive Retirement Planning figures and the reason you can re-run this page as often as you like.
The vocabulary of SIMPLE IRA
- Employer match elected
- $2,027.82 in the default SIMPLE IRA calculation — one of the secondary figures an experienced reader checks before trusting the primary number.
- 2% nonelective alternative
- $1,351.88 in the default SIMPLE IRA calculation — one of the secondary figures an experienced reader checks before trusting the primary number.
- Total annual contribution
- $17,296 for the SIMPLE IRA worked case; it sits next to the main result because it carries context the headline leaves out.
- SIMPLE balance at year 17
- The primary output of this tool: $543,263 for the default inputs, computed exactly from SIMPLE 3% dollar-for-dollar match + deferrals grown; 2% nonelective alternative for low deferral.
- Worked example
- Every substitution in order, from the example inputs to $543,263 — the audit trail for the headline figure.
- Verdict band
- The interpretation attached to a result (“The SIMPLE is the 100%-vested, no-testing alternative: at a 3% match you reach $17,296/yr of total contributions without filing anything beyond a plan election” on these inputs), which turns a bare number into a position on a scale.
- Sensitivity (±10 %)
- How far the SIMPLE IRA moves when a single input is nudged ten percent either way; the ranked list on this page is computed live from this engine.
Where the SIMPLE IRA model comes from
Everything above runs on one stated formula, applied without hidden coefficients: SIMPLE 3% dollar-for-dollar match + deferrals grown; 2% nonelective alternative for low deferral. Source of record: IRC §408(p); SECURE 2.0 deposit-correction rules. Specialist software layers extra coefficients on top of the same algebra; none are hidden here, and that transparency is what makes a disagreement traceable to a specific input instead of a black box.
Nothing here replaces a qualified professional, and nothing here is approximate either — the arithmetic is exact, and the honesty is in the inputs you supply. The sensitivity table above is part of that promise rather than a bonus: it lets you see how much of the result depends on how carefully you measured.
Next steps after the calculation
Re-run the calculation with your own figures, stress the two most sensitive inputs by ±10 %, and only then act on the result.
This page was written for people who need one trustworthy number before their next decision, and the promise is that nothing above required trust. Bookmark the tool, re-run it whenever an input moves by more than a few percent, and keep the date with the number.