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How much cash should I keep if I buy before I sell?

Plan for cash needed at the purchase, payments while you own both homes and a reserve that remains if the sale is delayed. Expected equity is not available cash until a sale or approved borrowing provides it. Stress a longer timeline and lower proceeds before choosing the smallest possible starting reserve.

By Eric Hamilton · Published September 17, 2026

List cash by date

Put the deposit, closing funds and recurring payments on a timeline. Include the existing mortgage, new mortgage and any bridge or equity loan payment. Money arriving after the new closing cannot fund an earlier obligation.

Separate reserve from down payment

Do not count the same savings as both purchase cash and your safety cushion. Decide what must remain accessible after each stage, including before the old home sells.

Test an uncomfortable sale

Add several months of carrying costs and reduce expected sale proceeds. Use a scenario you can understand, not a forecast. If either change creates a shortfall, adjust the plan before committing.

Avoid counting future borrowing

A credit line that is not approved or funded is not a confirmed reserve. Even available borrowing has terms and repayment risk. Compare selling first if the cash buffer remains too thin.

Sources and scope

General U.S. education. Program, investor, company, servicer and state requirements vary. Agency references describe their own scope, not universal eligibility. Illustrations are hypothetical, not quotes or approvals.

  1. Fannie Mae: Qualifying impact of other real estate owned Accessed September 17, 2026
  2. CFPB: Building an emergency fund Accessed September 17, 2026

Approved for publication by Eric Hamilton on September 17, 2026.

General education, not a loan quote, approval or an individual recommendation. Ask the appropriate professional about your situation.

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