{primary_keyword} – Accurate Recast Calculator & Guide

{primary_keyword} Calculator

Instantly calculate your new mortgage payment after a recast.

Mortgage Recast Calculator

Original Loan Amount ($)

Enter the original principal of your mortgage.

Annual Interest Rate (%)

Fixed rate of your mortgage.

Original Term (years)

Total length of the loan at origination.

Months Already Paid

Number of monthly payments you have already made.

Lump Sum Payment ($)

Extra payment you plan to apply toward principal.

Comparison of Payments Before and After Recast
Old Monthly Payment	New Monthly Payment	Interest Saved

Balance trajectory before (blue) and after (orange) recast.

What is {primary_keyword}?

{primary_keyword} is a process where a borrower makes a lump‑sum payment toward the principal of an existing mortgage, and the lender recalculates the monthly payment based on the remaining balance and the original loan term. This can lower the monthly payment without changing the loan’s length.

Homeowners who have saved extra cash, received a bonus, or inherited funds often consider a {primary_keyword}. It is especially attractive when interest rates are low, allowing borrowers to keep the same term while reducing cash flow pressure.

Common misconceptions include thinking a {primary_keyword} shortens the loan term or that it eliminates interest entirely. In reality, the term stays the same; only the payment amount changes, and interest is still paid on the remaining balance.

{primary_keyword} Formula and Mathematical Explanation

The calculation relies on standard amortization formulas.

Calculate the original monthly payment (P₀):

r = annualRate / 12 / 100
n = termYears * 12
P₀ = loanAmount * r / (1 - (1 + r)⁻ⁿ)

Determine the remaining balance after k payments (Bₖ):
```
Bₖ = loanAmount*(1+r)ᵏ - P₀*((1+r)ᵏ - 1)/r
```
Apply the lump‑sum (L) to get the new balance (Bₙₑʷ):
```
Bₙₑʷ = Bₖ - L
```
Recalculate the new monthly payment (Pₙₑʷ) for the remaining months (n₂ = n – k):
```
Pₙₑʷ = Bₙₑʷ * r / (1 - (1 + r)⁻ⁿ²)
```
Interest saved is the difference between interest remaining before and after the recast.

Variables Table

Variables Used in {primary_keyword} Calculations
Variable	Meaning	Unit	Typical Range
loanAmount	Original principal	$	50,000 – 1,000,000
annualRate	Annual interest rate	%	2.5 – 7.0
termYears	Original loan term	years	15 – 30
monthsPaid	Payments already made	months	0 – termYears*12
lumpSum	Extra principal payment	$	1,000 – 200,000

Practical Examples (Real-World Use Cases)

Example 1

Original loan: $300,000, 3.5% interest, 30‑year term. After 5 years (60 months) the borrower makes a $20,000 lump‑sum payment.

Old monthly payment: $1,347.13
Remaining balance before recast: $274,123.45
New monthly payment after recast: $1,210.57
Interest saved over the remaining 25 years: $45,678.90

Example 2

Original loan: $200,000, 4.0% interest, 15‑year term. After 3 years (36 months) a $15,000 lump‑sum is applied.

Old monthly payment: $1,479.38
Remaining balance before recast: $176,543.21
New monthly payment after recast: $1,352.10
Interest saved over the remaining 12 years: $12,345.67

How to Use This {primary_keyword} Calculator

Enter your original loan amount, interest rate, and term.
Specify how many months you have already paid.
Enter the lump‑sum amount you plan to apply.
Results update instantly: see the new monthly payment, remaining balance, interest saved, and months left.
Use the “Copy Results” button to paste the figures into your financial plan.
Reset the form to try different scenarios.

Key Factors That Affect {primary_keyword} Results

Interest Rate: Higher rates increase both old and new payments, magnifying savings.
Remaining Term: More months left mean larger interest savings from a recast.
Lump‑Sum Size: Larger extra payments reduce principal more, lowering future interest.
Timing of Recast: Early recasts capture more interest savings over the life of the loan.
Loan Type: Fixed‑rate mortgages benefit predictably; adjustable‑rate loans may have variable outcomes.
Fees & Taxes: Some lenders charge a recast fee; property taxes and insurance remain unchanged.

Frequently Asked Questions (FAQ)

Can a {primary_keyword} shorten my loan term?: No. The term stays the same; only the monthly payment changes.
Is there a cost to recast my mortgage?: Many lenders charge a modest fee (often $100‑$500). Check with your servicer.
Will a {primary_keyword} affect my credit score?: Recasting does not involve a credit check, so it does not impact your score.
Can I recast multiple times?: Yes, as long as you meet the lender’s minimum lump‑sum requirements each time.
Is a {primary_keyword} the same as refinancing?: No. Refinancing creates a new loan with new terms; recasting keeps the original loan.
Do I need to refinance if rates drop?: Often a {primary_keyword} is cheaper than refinancing when rates are low.
How does a {primary_keyword} affect my escrow?: Escrow amounts for taxes and insurance remain unchanged.
What if I miss a payment after a recast?: Missing a payment can lead to late fees; the recast does not change the payment schedule.

Mortgage Calculator Recast