Loan Tools
example rates
loan.tools

Monthly payment

Your numbers

$

= $170,000

%
years
Additional costs

$

$
%

$/month

Loan balance · home equity

Remaining loan balance Home equity Interest paid

Where each payment goes

Each tile is a payment, each column a year. The green ring represents when principal passes interest. Drag the payoff tile to pick your payoff date.

Mostly interest 50 / 50 Mostly principal

What ifrate, term & extra-payment scenarios

ChangeMonthly paymentLifetime interestTotal paidPayoff
Interest rate%
Interest rate%
Down payment%
Loan termyears
Extra / month$
Extra / year$
One-time payment$

What if this was an ARM?

Same loan, term, and extra payment as above, as an adjustable-rate mortgage (ARM). The rate is fixed for the first years. After that it resets to a market index plus the lender's margin, and caps limit how far each reset can move it.

7 years fixed, then resets every 6 months
Your rate until the first reset
%

The market rate your ARM follows. Today's value.
%
Lender's markup over the index. Fixed for the life of the loan.
%
Rate caps
Max move at the first reset
%
Max move at each reset after that
%
Max rise over the starting rate, ever
%

Before first reset If the index holds If rates rise to the caps Fixed loan

Can I afford this?

before tax

$

after tax & savings

$

Rent vs Buy

Your mortgage payments build equity over time, while renting has lower initial costs.
Compare Renting vs Home Ownership.

$

default: U.S. average asking rent

rent history from FRED

investment gains offset rent

home price history from FRED

upkeep & maintenance %

Cost of rent Total paid out Home Ownership (net of equity)

Interest rate vs your mortgage

Your loan at every rate from 2% to 10%. P&I only.

Loan Amortization Table

YearPrincipal paidInterest paidBalanceEquity