Mortgage Calculator

Annie Scott Realty Group
Mortgage Analysis

Know your payment before you commit.

Calculate your monthly mortgage payment, total interest cost, and full amortization breakdown — so you can negotiate from a position of clarity.

Why do real estate investors use a Mortgage Calculator?

Because the sticker price of a property is not what you actually pay — the financing terms determine your true cost of ownership.

By modeling your monthly payment, total interest, and amortization schedule upfront, you can compare loan structures, evaluate the true impact of your down payment, stress-test different interest rates, and enter every negotiation with full command of your numbers.

Calculator · Mortgage Analysis

Mortgage payment

Enter property and loan details to calculate your monthly payment and full cost of borrowing.

Loan Details

Mortgage payment

Enter your property value, down payment, rate, and term to see a full payment breakdown.

Property

*

$

The total acquisition cost or current market value of the property.

*

$

Initial equity capital at closing.

auto

%

Enter % to auto-fill dollar amount.

Loan Amount = Price − Down Payment $0
Loan Terms

*

%

*

Optional Costs included in monthly estimate

optional

$

optional

$

optional

$

Private Mortgage Insurance — usually required if LTV > 80%.

optional

$
⚠  Required fields are missing.
Results · Live

Payment Analysis

Monthly payment, total cost, and amortization breakdown.

Awaiting your figures

Enter property and loan details, then hit Calculate.

Monthly Payment (P&I)
$0
— total monthly incl. taxes & insurance
LTV — —
Loan Amount
—
Total Interest
—
Total Cost (P+I)
—
Effective Rate
—
Interest 0%
Payment Composition · Principal vs Interest
Principal
Interest
Purchase Price—
Down Payment—
Loan Amount (Principal)—
Annual Interest Rate—
Loan Term—
Monthly P&I Payment—
Monthly Taxes & Insurance—
Monthly HOA Fees—
Total Monthly Payment—
Total Principal Paid—
Total Interest Paid—
Total Cost of Loan (P+I)—
—

Mortgage Payment Calculator

Why do real estate investors use a Mortgage Calculator?

Because the sticker price of a property is not what you actually pay — the financing terms determine your true cost of ownership.

By modeling your monthly payment, total interest, and amortization schedule upfront, you can compare loan structures, evaluate the true impact of your down payment, stress-test different interest rates, and enter every negotiation with full command of your numbers.

Formula

Monthly Mortgage Payment (P&I)

M= P × r (1 + r)n (1 + r)n − 1

Where: P = Loan Amount  ·  r = Monthly Rate (Annual Rate ÷ 12)  ·  n = Total Payments (Term × 12)
Step-by-Step Example

Commercial property: $2,500,000 purchase price, $500,000 down payment, 6.5% rate, 30-year term.

Step 1

Loan Amount

$2,000,000

Purchase Price ($2,500,000) minus Down Payment ($500,000) = $2,000,000 principal.

Step 2

Monthly Interest Rate

0.5417%

Annual Rate (6.5%) ÷ 12 = 0.541667% per month (r = 0.005417)

Step 3

Total Payments

360

30 years × 12 months = 360 monthly payments (n = 360)

Step 4

Apply the Formula

$12,648 / month

M = $2,000,000 × [0.005417 × (1.005417)³⁶⁰] ÷ [(1.005417)³⁶⁰ − 1]

  • Monthly P&I Payment$12,648
  • Total Payments Over Life$4,553,280
  • Total Interest Paid$2,553,280
  • Interest as % of Total Cost56.1%
  • LTV Ratio80%
Final Result
M = $2,000,000 × [0.005417 × (1.005417)³⁶⁰] ÷ [(1.005417)³⁶⁰ − 1]
= $12,648 / mo

Over 30 years, you pay $4,553,280 in total — meaning $2,553,280 in interest alone. This is exactly why smart investors stress-test financing terms before signing, refinance strategically, and always model the true cost of borrowing before committing to a deal.

© Annie Scott Realty Group LLC Estimates only · not financial advice

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