Mortgage calculators

Recasting, releasing equity, and paying down early.

A mortgage payment is the same number for thirty years, and what it buys changes every month. At the start it is almost entirely interest, because interest is charged on the balance outstanding and at the start the balance is the whole loan. These seven calculators cover the decisions that come up once a mortgage already exists: recasting it, paying it down faster, borrowing against the equity, and what happens when a fixed period ends.

7 calculators

Reverse mortgage What a HECM could release. No form, no lead capture.
Mortgage recast A lump sum against the balance, keeping the same term.
Mortgage insurance What PMI adds, and when it can come off.
HELOC payoff The payment jump when the interest-only draw period ends.
Biweekly payments What twenty six half payments a year actually saves.
Bridge loan Carrying two properties, with the fees annualised.
Adjustable rate The hard ceiling your caps put on the payment.

What every mortgage calculator here assumes

These apply across the cluster. Each page repeats the ones that bear on its own result, so you never have to come back here to read a figure.

Principal and interest only: No property tax, no homeowners insurance, no HOA dues, and no mortgage insurance unless the page is about mortgage insurance. Folding escrow in produces a payment that matches nothing on any document you hold.
The standard amortisation formula: The same expression every servicer uses: the payment that clears the principal over the term at the given monthly rate. It is mathematics rather than regulation, and no agency defines it.
The final payment absorbs the rounding: Cents do not divide evenly across 360 months, so the last payment differs slightly. A schedule whose final row is identical to all the others has not been reconciled against its own total.
No rate forecasts: Where a future rate is unknowable, these pages compute the contractual ceiling instead of predicting a path. A forecast dressed as a calculation is worse than an assumption stated plainly.

What they deliberately leave out

Every exclusion here is a real cost or a real rule. They are left out because including them would need information this site does not have, and a figure built on a guess is worth less than a figure with a stated gap.

Closing costs, origination fees, points and title charges, all of which change what a refinance or a new loan actually costs.
Escrow, and the annual adjustment that moves your real monthly payment.
Tax treatment. Whether mortgage interest is deductible depends on your return, not on the loan.
Private arrangements. Whether a servicer permits a recast, or applies an extra payment to principal, is their policy rather than a rule.