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I-Bond vs CD vs High-Yield Savings Calculator

Compare simplified after-tax I Bond, CD, and high-yield savings scenarios using user-entered rates and an approximate early-redemption penalty.

Quick answer: I Bonds, CDs, and HYSAs solve different cash needs: inflation protection, locked-rate yield, and flexible access. Compare after-tax yield, liquidity, limits, and time horizon.

SWReviewed by SwitchWize Research Desk · Last reviewed July 20, 2026
I-Bond After-Tax Value
$11,291
I-Bond After-Tax Value
$11,291
HYSA Total (before tax)
$12,284
HYSA Interest Earned
$2,284
HYSA After-Tax Value
$11,630
Side-by-side comparison
CD Total (before tax)
$12,462
CD After-Tax Value
$11,754
I-Bond Total (before tax)
$11,655
Approximate I Bond Early-Redemption Penalty
$0
CD advantage over HYSA
$124
Diagnostic

The differential is $124 between these options.

Small rate or term differences compound. Don't leave the gap on the table.

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What to do next

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Your action plan
  1. 1

    Compare the leading option against your current setup

    Compare simplified after-tax I Bond, CD, and savings scenarios with an approximate early-redemption penalty.

  2. 2

    Compare the result against current market-rate options

    Assumptions change the answer, especially when rates, taxes, or timing matter.

  3. 3

    Save the result to Money Map or use the linked next action

    Turn the result into a prioritized action instead of treating it as a one-off number.

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This is an educational estimate, not tax, legal, investment, or lending advice. Confirm with a qualified professional or the provider before acting.

Calculator action path

Turn this result into a decision

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You could gain ~$11,291/yr — compare nowMove from calculation to current product options.
Rate Trend
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Guide
How Much Is Closing the Bank Gap Worth in Your State?The gap between the average savings rate and the best available one is a national number, 3.72 percentage points. What it's actually worth after tax isn't: it ranges from about $725 a year in the nine no-income-tax states down to $602 in California, purely because of how states tax interest. Every state ranked.
Money Map
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Alert
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Reviewed Aug 30, 2026 · Methodology

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Frequently Asked Questions

Everything you need to know.

What does the I-Bond vs CD vs High-Yield Savings Calculator show?
Compare simplified after-tax I Bond, CD, and high-yield savings scenarios using user-entered rates and an approximate early-redemption penalty.
How should I use the result?
Use the result as a planning and comparison aid. Review the assumptions, adjust your inputs, and compare the output with your actual options before acting.
What should I do after using this calculator?
Use the related links and next-action modules on the page to compare products, continue in Money Map, or review related guidance on SwitchWize.
Is the I-Bond vs CD vs High-Yield Savings Calculator free to use?
Yes. SwitchWize calculators are free, and you do not need an account to run scenarios or view the result.
Does using the I-Bond vs CD vs High-Yield Savings Calculator affect my credit score?
No. Using a calculator does not trigger a credit check. A credit impact can occur only if you apply directly with a lender, card issuer, or provider.
Are the results personalized financial advice?
No. Calculator outputs are educational estimates based on the inputs you enter. Review assumptions and confirm terms directly with providers before making a financial decision.
What should I do after seeing the result?
Use the recommendation module on this page to compare savings options, or run Money Map to compare this banking & savings decision with your other opportunities.
How does SwitchWize choose related offers?
Related offers are matched by the calculator surface (savings) and ranked using SwitchWize data such as rate, fees, trust signals, product fit, and switching friction. Paid relationships do not change organic ranking order.
How fresh are the rates and offers shown?
Rate and offer data is reviewed on a recurring cadence and every offer module shows review context or links to the methodology and disclosure pages.
Where can I see the ranking methodology?
The SwitchWize methodology page explains how rate freshness, editorial review, affiliate disclosure, and category ranking factors work.
Can Money Map use this result?
Yes. Money Map is the broader diagnostic path: it compares savings, mortgage, cards, and debt so you can see whether this calculator result is your highest-impact next move.

Why This Matters

I-Bond vs CD vs High-Yield Savings Calculator helps users make a banking & savings decision with clearer numbers, assumptions, and next actions.

How to Use It

  1. 1Enter your numbers in the input panel.
  2. 2Review the live results and interpretation on the right.
  3. 3Use the compare outputs to compare options or plan the next step.
  4. 4Use the related links below if you want to move from analysis to action.
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