Target fund
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Months of expenses to a target fund, monthly save amount, and date you hit the goal.
Page updated 2026-09-14.
Target fund
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Amount still needed
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Months to goal
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Coverage today (months)
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At $4,200 in essential monthly expenses and a 6-month coverage target, the fund goal is $25,200. Starting from $2,500 saved, the remaining gap is $22,700. At $400/month in new contributions, closing that gap takes 56.75 months -- just under 4.75 years.
Right now, $2,500 against $4,200 in monthly expenses covers 0.60 months -- about 18 days -- which is the number that matters if an unplanned expense or income gap hits today, before the fund is built up.
The math is linear: target months x monthly expenses = target fund; gap divided by monthly contribution = months to goal. Raising the contribution rate has a direct, proportional effect on how fast the gap closes.
Cash buffer math only. Not investment advice. At $400/month, this fund takes nearly five years to complete -- if that timeline feels too long, the lever to pull is the contribution amount, not the target (cutting the target below 3-6 months of expenses defeats the purpose of an emergency fund).
Expenses and target months must both be greater than zero, or the calculator can't produce a target fund size.
Where the fund sits while it grows matters too -- idle cash in a checking account loses ground to inflation. Compare rates on the High-Yield Savings APY Comparator before parking six months of expenses somewhere earning close to nothing.
Once this goal is met, the same $400/month redirected elsewhere compounds differently -- see what it could do in a taxable brokerage account with the Dividend Reinvestment (DRIP) Calculator.
If a specific near-term purchase (not an emergency) is the real goal, the Sinking Fund Savings Calculator is built for that instead.
Target fund = essential monthly expenses x target months of coverage. At $4,200/month and a 6-month target, that's $4,200 x 6 = $25,200.
Months to goal = remaining gap / monthly contribution: $22,700 / $400 = 56.75. The calculator doesn't assume the saved cash earns interest while you build the fund -- it's a pure contribution-pace estimate.
It's current savings divided by monthly expenses -- how many months you could currently survive on savings alone if income stopped. In the default example, $2,500 / $4,200 = 0.60 months.
That's a common default, not a rule. Single-income households or variable-income earners often target 9-12 months; dual-income households with stable jobs sometimes use 3. Change the target-months field to match your situation.
No. Cash buffer math only. Not investment advice. It answers 'how much and how long,' not where to hold the money or how to invest it once the buffer is built.
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