Closing Extension Cost Calculator

Extensions often cost money and may lose earnest money.

Extension fee

Per diem rate

Days extended

Daily carrying cost

Total extension cost

$59,500

Per diem total

$22,500

Carrying total

$12,000

How the math works

Total = fee + (per diem × days) + (carrying × days).

$25k fee + $1500 × 15 = $22.5k per diem + $800 × 15 = $12k carrying = $59.5k total extension.

How to Use

Enter extension fee.
Enter per diem rate.
Enter days extended.
Enter carrying cost per day.
Read total extension cost.

Frequently Asked Questions

Extension fee structure?

Fixed fee: $10-50k flat. Per diem: $500-5000/day. Combined: fixed + per diem. Larger transactions: fees scale to 0.05-0.2% of purchase. Negotiable, especially if buyer reasonable delay cause.

When to extend?

Financing approval pending. Title issue resolution. DD findings to resolve. Construction completion. Regulatory approval delay. Weather delay. Each has different negotiation basis. Document reason in extension amendment.

Alternative?

Walk away: lose earnest money. Re-negotiate purchase price: sellers may concede to close. Shift to seller financing or installment sale. Restructure contingencies. Each alternative has its own cost/benefit analysis.

How often should I rerun this?

Rerun this calculator whenever inputs change materially — new rent roll data, rate moves, loan balance updates, or quarterly operating data. For active deals, monthly refresh is typical. For stabilized assets under monitoring, quarterly is fine. Treat the output as a decision tool, not a one-time answer — market conditions evolve and so should your analysis.