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Checking Fee Leak Calculator

How much is your checking account quietly costing you? This tool adds up the explicit fees plus the after-tax interest your idle cash is not earning — and ranks the cheapest fix.

Quick answer: Compare entered fees and signed after-tax interest differences without assuming switching always wins. Enter Average checking balance, Idle cash you could move, Current checking APY, and Monthly maintenance fee to personalize the estimate. It returns Signed annual difference, Explicit fees, and Signed interest difference so you can compare the impact before choosing a next step. Use it to compare cash flow, interest, liquidity, and next-account choices before moving money.

Your situation
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$

Cash beyond your day-to-day spending buffer.

Current option
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$
$
$
$
Alternatives
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$

Your decision

Switch to a no-fee account. The signed annual difference is about $240 ($20/mo) from entered fees and after-tax interest.

Recommended: Switch to a no-fee checking account

Signed annual difference

Costly

$240

$20/mo

Explicit fees plus the signed after-tax interest difference. A negative amount favors the current account.

Explicit fees

Watch

$144

per year

Maintenance, ATM, overdraft, wire and other charges.

Signed interest difference

Watch

$96

per year, after tax

Alternative interest minus current interest after the entered tax-rate scenario.

First-year value of switching

Good

$240

Signed annual difference plus the entered gross bonus. Bonus taxes, requirements, and switching costs are excluded.

Ranked options

  1. #1Switch to a no-fee checking account

    Eliminates $144/yr in explicit fees. No-fee accounts are widely available with no minimum balance.

    $144/yr
    Confidence: HighEffort: MediumRisk: Low

  2. #2Keep checking, move idle cash to high-yield savings

    The signed after-tax interest difference on $3,000 at 4.40% is about $96/yr.

    $96/yr
    Confidence: HighEffort: LowRisk: Low

  3. #4Keep your current setup

    The total leak is small — not worth the switching effort right now.

    Confidence: MediumEffort: LowRisk: Low

Watch-outs

  • • Savings APYs can change. New-account bonuses may be taxable and usually have eligibility, deposit, balance, and timing requirements that this tool does not model.

Assumptions used

Average checking balance
$5,000
Idle balance moved
$3,000
Current checking APY
0.01%
Alternative savings APY
4.40%
Combined tax rate
27.00%

Estimates based on your assumptions above — roughly indicative, not financial, tax, or legal advice.

Next steps

See Today's Top Savings Rates →
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Why this matters

A checking account leaks money two ways: visible fees (maintenance, ATM, overdraft) and the invisible cost of idle cash earning near 0% when a high-yield savings account would pay several percent. Together these often add up to hundreds of dollars a year — entirely recoverable by moving cash or switching to a no-fee account.

Frequently asked questions

How is the total annual leak calculated?
It is the sum of your explicit fees (maintenance, ATM, overdraft, wire/other) plus the after-tax interest your idle balance would earn at a high-yield savings rate instead of your checking APY. The leak is floored at zero — it can never be negative.
Should I move all my checking cash to savings?
No. Keep a working buffer in checking for day-to-day spending and to meet any minimum-balance requirement that waives fees. Only the genuinely idle portion should move to a high-yield savings account. The tool warns you if the idle amount you entered is your entire balance.
Is switching banks worth it for a fee?
Usually yes if you pay a monthly maintenance fee. No-fee checking accounts with no minimum balance are widely available, so an avoidable $12/month fee is $144/year of pure waste. The tool also factors any new-account bonus into the first-year value of switching.
Why does the interest opportunity cost get taxed?
Savings-account interest is taxable as ordinary income, so the real benefit of moving idle cash is the after-tax amount. The calculator applies your combined federal and state marginal rate to the opportunity cost so the comparison is honest.
What is a realistic idle balance?
It is the cash sitting in checking beyond what you need for monthly spending and your safety buffer. If you keep $5,000 in checking but only cycle $2,000 of bills, roughly $3,000 is idle and could be earning interest elsewhere.

This tool produces estimates based on the assumptions you enter. It is not financial, tax, or legal advice. Actual rates, fees, and outcomes depend on your lender, account terms, and approval.