HYSA Interest Calculator

Estimate how much interest a high-yield savings account can earn from your balance, deposits, APY, and time horizon.

Quick answer: A high-yield savings account earns simple daily interest that compounds into APY. Enter your balance, APY, and months saved to estimate interest earned and the gap versus a low-rate bank account.

Ending Balance

$13,500

Ending Balance

$13,500

Total Deposits

$13,000

Interest Earned

$500

After-Tax Interest

$380

HYSA growth mix

$13,500total

Your deposits$13,000

Interest earned$500

Total$13,500

Total Deposits: $13,000Ending Balance: $13,500Interest Earned: $500After-Tax Interest: $380

Average Monthly Interest

$42

Diagnostic

At your APY, your HYSA grows to about $13,500 over 12 months.

That includes $500 of interest before tax and $380 after tax.

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At 4.40% APY, $10,000 plus $250/mo could grow to $13,500 over 12 months.

What to do next

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Your action plan

1
Calculate the baseline result with your current numbers
Estimate savings growth using effective-APY compounding, end-of-month deposits, and an entered tax-rate scenario.
2
Compare the result against current market-rate options
Assumptions change the answer, especially when rates, taxes, or timing matter.
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

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Online Bank vs Credit Union vs Traditional Bank GuideOnline bank vs credit union vs traditional bank 2026: compare savings APY, loan rates, fees, and branch access to build the optimal banking setup for your household.

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Top savings picks

Reviewed Jul 21, 2026 · Methodology

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Newtek Bank

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4.20%APY

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3.95%APY

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4.00%APY

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Frequently Asked Questions

Everything you need to know.

What does the HYSA Interest Calculator show?

Estimate how much interest a high-yield savings account can earn from your balance, deposits, APY, and time horizon.

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 HYSA Interest 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 HYSA Interest 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 high-yield savings rates, 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.