Rollover IRA Growth Calculator: What a Rolled-Over Balance Builds
Work out what a rollover IRA grows to from the balance you rolled over plus any ongoing monthly contributions — so you can see the long-term value of consolidating an old 401(k) and continuing to invest it.
Adjust the inputs and select Calculate for a full breakdown.
Year-by-year growth schedule
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Future value | Total contributions | Total interest earned |
|---|---|---|---|
| $50k + $500/mo · 6% · 15yr | $268,114.03 | $140,000.00 | $128,114.03 |
| $25k + $0/mo · 7% · 25yr (no new adds) | $143,135.46 | $25,000.00 | $118,135.46 |
| $100k + $500/mo · 6% · 20yr | $562,040.90 | $220,000.00 | $342,040.90 |
| $15k + $300/mo · 7% · 30yr | $487,738.76 | $123,000.00 | $364,738.76 |
How This Calculator Works
Enter the balance rolled over from a former employer's plan, any new monthly contributions, the return you expect, and the number of years. The calculator compounds the balance monthly and shows the ending value and the growth beyond your contributions.
The Formula
Future Value with Regular Contributions
P = starting amount, PMT = monthly contribution, r = monthly rate (annual ÷ 12), n = number of months
Worked Example
A $50,000 rollover plus $500 a month for 15 years at 6% grows to about $268,114 — of which roughly $128,114 is investment growth. Rolling an old 401(k) into an IRA keeps the money tax-deferred (no tax or penalty on a direct rollover) while typically opening up far more investment choices and often lower fees than an old employer plan. Consolidating scattered old accounts into one IRA also makes them easier to manage and rebalance.
Key Insight
A rollover IRA is one of the most common and worthwhile retirement housekeeping moves, and the growth math shows why keeping the money invested matters. The key mechanics: a direct rollover (funds moving trustee-to-trustee) avoids any tax or the 10% early-withdrawal penalty and preserves tax-deferred growth — never take a check to yourself and risk the 60-day rule and mandatory withholding. The advantages over leaving money in an old 401(k) are usually broader investment options and potentially lower fees, plus the simplicity of consolidating multiple old accounts. A few caveats this calculator doesn't model: rolling a traditional 401(k) into a traditional IRA stays tax-deferred, but converting to a Roth IRA triggers tax now (sometimes worth it); IRA contribution limits cap new annual contributions; and a rollover IRA can complicate the 'backdoor Roth' strategy due to pro-rata rules. The biggest driver of the outcome remains time and consistent contributions — consolidating and continuing to invest, rather than cashing out an old balance, is what lets compounding do its work.
When to rollover and when to leave with former employer
Rollover advantages: (1) FUND OPTIONS — IRA gives access to thousands of funds vs typical 401(k) with 15-30 options; (2) LOWER FEES — typical employer 401(k) total fee ~1.0% vs IRA at Vanguard/Fidelity/Schwab at 0.05-0.30%; (3) CONSOLIDATION — multiple 401(k)s from job changes consolidate into single IRA simplifying management.
Keeping with former employer advantages: (1) EARLY WITHDRAWAL — 401(k) at 55+ with separation has no penalty (Rule of 55); IRA requires 59½; (2) CREDITOR PROTECTION — 401(k) has unlimited federal creditor protection; IRA limited; (3) LOAN ACCESS — 401(k) may permit loans; IRA doesn't.
Decision framework: most workers should rollover for fund/fee benefits unless they have specific need for 401(k)-specific protections (Rule of 55 for early retirement; substantial creditor protection concerns; planned 401(k) loan). For job changes before age 50, rollover typically wins.
Rollover mechanics — direct vs indirect
DIRECT ROLLOVER: custodian-to-custodian transfer. Check made out to receiving custodian (e.g., 'Vanguard Brokerage Services FBO John Smith'). No tax withholding; complete tax neutrality.
INDIRECT ROLLOVER (60-day): check made out to you personally. Plan must withhold 20% federal tax (you can replace it from other funds within 60 days). You have 60 days to deposit full amount in new IRA. Miss 60 days = taxable distribution + 10% penalty if under 59½. Risk-prone — direct rollover almost always preferred.
Direct rollover process: contact new IRA custodian (Vanguard, Fidelity, Schwab); they provide forms / instructions; submit to old employer plan administrator; funds transfer typically 5-10 business days. No tax forms required at year-end (other than informational 1099-R / 5498).
Avoid mistakes: pro-rata rule applies if you have mixed pre-tax and after-tax balances in IRAs (taxes apply proportionally on any conversion). Inherited IRA rollover rules different (non-spouse 10-year rule under SECURE Act). Spouse-inheriting can treat as own IRA.
Rollover IRA — typical scenarios
Reference rollover IRA decision scenarios.
| Scenario | Optimal action | Rationale |
|---|---|---|
| Job change at 30, $50K in 401(k) | Rollover to IRA | Better fund options; lower fees |
| Job change at 55, $300K in 401(k) | Consider keeping in 401(k) | Rule of 55 access; no early penalty |
| Job change at 65, retiring | Rollover to IRA | Penalty-free anyway; better options |
| Multiple old 401(k)s | Consolidate to single IRA | Simplifies management |
| High-fee 401(k) at current employer | Rollover to IRA when separate | Major fee savings |
| Considering bankruptcy protection | Keep in 401(k) | Unlimited federal protection |
For most workers under 50 changing jobs, rollover to low-cost IRA is the optimal default. For workers in their 50s, consider Rule of 55 access for early retirement before rolling over. Pre-rollover account analysis: compare expense ratios (401(k) often 0.50-1.50%; IRA at Vanguard/Fidelity/Schwab 0.03-0.30%). Over decades, the fee differential dwarfs the marginal benefit of 401(k)-specific protections for most workers.
Frequently Asked Questions
How is rollover IRA growth calculated?
The rolled-over balance and each monthly contribution compound at the expected return (annual rate ÷ 12 per month). $50,000 plus $500/month for 15 years at 6% grows to about $268,114, with roughly $128,114 of that being investment growth.
Is a 401(k) rollover taxable?
A direct rollover (trustee-to-trustee) into a traditional IRA isn't taxed and avoids the early-withdrawal penalty — the money stays tax-deferred. Converting to a Roth IRA triggers income tax on the amount now. Avoid taking a check yourself, which can trigger withholding and the 60-day redeposit rule.
Why roll an old 401(k) into an IRA?
Usually for more investment choices and potentially lower fees than an old employer plan, plus the simplicity of consolidating scattered accounts into one. It keeps the money tax-deferred and growing. (Some prefer to keep a 401(k) for its stronger creditor protection or to allow a backdoor Roth — weigh your situation.)
Can I keep contributing to a rollover IRA?
Yes, subject to the annual IRA contribution limit (and income rules for deductibility or Roth eligibility). This calculator lets you add monthly contributions but doesn't enforce the IRS limit, so make sure your annual additions stay within the allowed amount.
Does a rollover IRA affect a backdoor Roth?
It can. Having a pre-tax balance in a traditional/rollover IRA triggers the pro-rata rule, which can make a backdoor Roth contribution partly taxable. If you plan to use the backdoor Roth strategy, consider whether to roll into an IRA or keep funds in a 401(k) — consult a tax professional.
When is this calculator unreliable?
When pre-tax and Roth balances are mixed (each rolls to its respective IRA type; conversion between types creates immediate taxable event). Also unreliable when ignoring 401(k) plan-specific advantages (Rule of 55, creditor protection, loan access) for workers in specific situations. The 'default rollover' is appropriate for most workers but specific circumstances may justify keeping with former employer.
References & Authoritative Sources
- Internal Revenue Service (IRS) — Rollovers — Plans and IRAs · consulted June 1, 2026 · Federal regulator on rollover rules
- U.S. Department of Labor — EBSA — Rollover Guidance · consulted June 1, 2026 · Federal employee benefits regulator
- Vanguard — IRA Rollovers — Rollover IRA Guide · consulted June 1, 2026 · Industry rollover guidance
Related Calculators
Data Sources & Benchmarks
This calculator draws on 1 independent, dated source. The starting values for expected annual return are taken from the benchmarks below and refresh whenever the snapshots are updated.
Methodology & Review
Rollover IRA growth uses compound interest formula. The calculator returns balance projection. Rollover IRA is U.S. IRA created by transferring funds from employer retirement plan (401(k), 403(b), 457(b), etc.) when employee separates from service. Direct rollover (custodian-to-custodian) avoids tax withholding; 60-day indirect rollover requires personal handling within 60 days or becomes taxable distribution. No contribution limit on rollover amount; subsequent annual contributions limited to standard IRA limits ($7K + $1K catch-up). RELIABILITY: Reliable for documented inputs. Less reliable when calculating across pre-tax and Roth balances — rollovers must maintain tax character (Traditional 401(k) rolls to Traditional IRA; Roth 401(k) rolls to Roth IRA; converting Traditional to Roth IRA triggers immediate tax).
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