Mortgage Reserve Calculator

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Need help reviewing a larger mortgage?

Explore reserves and debt ratios before reviewing property, income and lender-specific requirements.

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Calculator estimates are educational. A real mortgage professional can review your circumstances, documentation and lender requirements. A scenario review is not a loan approval or a guarantee of terms.

210 Mortgage | NMLS #219381

210 MORTGAGE • SCENARIO TOOLS

See your eligible assets after closing

Use this mortgage reserve calculator to subtract closing withdrawals and compare remaining eligible assets with a reserve target measured in housing-payment months.

1. Assets eligible for this analysis

Enter eligible portions, not unrestricted assumptions about entire account balances.

Eligible checking and savings ($)

Available and verified portions for this transaction.

Eligible investment assets ($)

Enter the amount your lender allows after required adjustments.

Eligible vested retirement assets ($)

Do not assume all retirement funds are accessible or eligible.

Other eligible assets ($)

Only lender-permitted sources.

2. Funds leaving those accounts

Include only withdrawals from the assets entered above. Avoid double counting.

Closing withdrawals from these assets ($)

Down payment + costs + escrows and other funds taken from the listed assets.

Additional debt-payoff withdrawals ($)

Exclude amounts already in closing withdrawals.

3. Reserve comparison target

The target is user-entered, not selected from a loan-program rule.

Complete qualifying monthly housing ($)

Include P&I, taxes, insurance, MI, HOA and applicable other housing costs.

Required or chosen reserve months

A planning assumption or lender-provided requirement; supports fractional months.

Additional reserve requirement ($)

Lender-calculated extra reserves; not another closing withdrawal.

No contact information required. Numbers stay in the browser unless you choose to share them in a review request.

Your scenario estimate

Complete the numbered sections, then select Calculate.

Educational estimates, not approval, a rate quote or a commitment to lend. Entered rates are hypothetical modeling assumptions, not currently available 210 Mortgage rates. No APR calculation, ARM changes or automatic eligibility decision. The target and asset eligibility are assumptions; actual reserve requirements require lender review. 210 Mortgage • Tyler Krug NMLS #219381 • Mortgage loans originated through My Community Mortgage, LLC NMLS #2408499 • Equal Housing Lender. See site licensing and disclosures.

How to Use the Mortgage Reserve Calculator

Step 1: Assets eligible for this analysis

Add available checking/savings and the lender-eligible portions of investments, vested retirement and other assets. Ask your lender about restrictions, taxes, penalties or adjustments; the tool does not apply a universal haircut.

Step 2: Funds leaving those accounts

Enter cash needed from those accounts for down payment, closing costs, escrows and other closing items. Enter separate debt payoffs only when they are not already included in that closing figure. Do not count reserve assets as money spent at closing.

Step 3: Reserve comparison target

Enter the complete qualifying monthly housing payment and the months required by your lender or selected for personal planning. Add any separately calculated reserve-dollar requirement for other properties or obligations. No universal number of months applies to every mortgage.

Calculate, compare and request a review

Choose Calculate to see your estimate. Change one assumption at a time and calculate again. Contact information is optional. Use the review form or Text a Question when you need help verifying the inputs.

How the Calculator Works

Remaining eligible assets = total entered eligible portions − closing withdrawals − separate payoffs. Reserve target = complete housing payment × target months + separately entered additional requirement. Housing months = nonnegative remaining assets ÷ positive housing payment. A negative raw balance is displayed as a closing funding shortfall.

Example calculation

Eligible assets of $80,000 minus $25,000 closing withdrawals leave $55,000. At a $3,000 housing payment and a six-month target, required reserves are $18,000, the modeled surplus is $37,000 and remaining assets cover 18.33 housing-payment months.

How to interpret your results

Compare both the closing funding result and reserve gap. A lender-required reserve is different from a comfortable emergency fund; you may choose a larger personal cushion.

Assumptions and factors that change the result

Only entered eligible portions count. No automatic investment/retirement haircut, gift eligibility, business cash-flow approval, multiple-property formula or agency minimum. The same assets cannot also be committed to an unentered transaction.

Frequently asked questions

Do all mortgages require six months?

No. Program rules, property characteristics, automated findings and lender overlays determine the actual requirement.

Can I count my full retirement balance?

Not automatically. Vesting, access and applicable requirements matter. Enter only the portion confirmed eligible for your scenario.

Related 210 Mortgage guides

Methodology sources

Guideline references checked October 6, 2026. Mathematical comparisons do not replace the applicable lender’s review.

Fannie Mae minimum reserve requirements