Mortgage Recast Calculator: Reduce Your Monthly Payments and Save on Interest

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Learn how a mortgage recast calculator can help you lower your monthly payments and save on interest by making a lump sum payment toward your mortgage principal. Explore the benefits and potential drawbacks of mortgage recasting.

What is a Mortgage Recast?

A mortgage recast involves making a substantial lump-sum payment towards the principal balance of your mortgage. This action prompts the lender to re-amortize the loan based on the new, lower balance, resulting in reduced monthly payments without altering the interest rate or the loan term.

Importance of Mortgage Recasting

Mortgage recasting can significantly lower your monthly financial obligations, making it an attractive option for homeowners seeking to improve their cash flow. It is particularly beneficial for those who have received a windfall or accumulated substantial savings.

How a Mortgage Recast Calculator Works

Understanding the Basics

A mortgage recast calculator helps you estimate the potential savings and new payment structure if you decide to recast your mortgage. It requires inputs like the current mortgage balance, interest rate, current monthly payment, lump-sum payment amount, and any lender fees.

Formula for Mortgage Recast Calculation

The simplified formula for calculating the new monthly payment after a recast is:

New Monthly Payment=(Remaining BalanceNumber of Remaining Payments)×Interest RateNew Monthly Payment=(Number of Remaining PaymentsRemaining Balance​)×Interest Rate

Key Inputs for the Calculator

  • Current Mortgage Balance: The remaining amount you owe on your mortgage.
  • Interest Rate: The annual interest rate on your mortgage.
  • Current Monthly Payment: Your current monthly mortgage payment.
  • Lump Sum Payment: The amount you plan to pay towards the principal.
  • Recasting Fee: Any fee charged by the lender for processing the recast.

Detailed Steps to Use a Mortgage Recast Calculator

Step-by-Step Guide

  1. Gather Information: Collect details about your current mortgage, including the balance, interest rate, and monthly payment.
  2. Determine Lump Sum Payment: Decide how much you can afford to pay towards the principal.
  3. Enter Data into the Calculator: Input all the required information into an online mortgage recast calculator.
  4. Analyze Results: Review the new monthly payment amount and total interest savings provided by the calculator.

Example Calculation

Assume your current mortgage balance is $200,000, your interest rate is 4%, and your current monthly payment is $1,200. If you make a lump sum payment of $50,000, the calculator will show how your monthly payment decreases and the overall interest saved.

Benefits of Mortgage Recasting

Lower Monthly Payments

The primary benefit of recasting is a reduction in your monthly mortgage payments, which can free up cash for other expenses or investments.

Interest Savings

By reducing the principal balance, you lower the amount of interest paid over the life of the loan, leading to substantial savings.

No Change in Loan Terms

Recasting does not alter the interest rate or the loan term, unlike refinancing, making it a simpler and less expensive option.

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Potential Drawbacks

Upfront Lump Sum Payment

Recasting requires a significant upfront payment, which may not be feasible for everyone.

Lender Fees

Some lenders charge a fee for recasting, which can offset some of the financial benefits.

Limited Availability

Not all mortgage lenders offer recasting as an option, so it’s important to check with your lender.

Mortgage Recasting vs. Refinancing

Key Differences

  • Recasting: Reduces monthly payments without changing the interest rate or loan term.
  • Refinancing: This involves taking out a new loan, which may offer a lower interest rate or different loan terms but incurs closing costs.

Pros and Cons

  • Recasting Pros: Lower monthly payments, no credit check required, less paperwork.
  • Recasting Cons: Requires a large lump sum payment, which may involve fees.
  • Refinancing Pros: Potentially lower interest rate, can change loan terms.
  • Refinancing Cons: Closing costs, a more complex process, impacts the credit score.

Case Studies and Real-Life Examples

Successful Mortgage Recasting Stories

  1. John and Mary: They made a $40,000 lump sum payment on their $250,000 mortgage, reducing their monthly payment by $300.
  2. Sarah: Used her bonus to pay down $30,000 on her mortgage, saving over $15,000 in interest over the loan term.

Lessons Learned

These examples highlight the importance of planning and the potential long-term financial benefits of mortgage recasting.

Expert Insights

Financial Advisor’s Opinions

Many financial advisors recommend mortgage recasting for homeowners with extra cash who want to lower their monthly payments without the hassle of refinancing.

Lender Perspectives

Lenders may have different policies and fees related to recasting, so it’s essential to discuss options with your mortgage provider.


Summary of Key Points

Mortgage recasting can be a powerful tool for reducing monthly payments and saving on interest. It requires a lump sum payment and may involve fees, but it offers a simpler alternative to refinancing.

Call to Action

If you’re considering mortgage recasting, use an online calculator to explore your potential savings and consult with your financial advisor to ensure it aligns with your financial goals.

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