Home Calculators Construction Loan Calculator

Construction Loan Calculator

Calculate interest-only payments during construction, model your draw schedule by phase, and see permanent mortgage costs after conversion.

Loan Details

Enter your construction loan parameters

Permanent Mortgage (after conversion)

Draw Schedule by Phase

#Phase NameDraw AmountMonth
Total draws $0
$0$450,000
Total Construction Interest
during build phase
Avg Monthly Interest
interest-only payment
Permanent Mortgage Payment
P&I only
Loan-to-Value (LTV)
at completion
Total Project Cost
loan + down + interest

Construction Loan Key Concepts

Interest-Only Payment

I = Balance × (Rate/12)

Monthly Mortgage

M = P×r(1+r)ⁿ/((1+r)ⁿ-1)

LTV Ratio

LTV = Loan / Value × 100

Draw Interest

Charged on drawn balance only