Recasting Calculator

Estimate your new, lower monthly payment after making a lump-sum principal payment on your loan.

Your Recast Results

New Amortization Schedule (First 12 Months)

Payment #	Interest	Principal	Remaining Balance

What is a Recasting Calculator?

A recasting calculator is a financial tool designed to show you the benefits of mortgage recasting. Recasting, also known as re-amortization, is a process where you make a significant lump-sum payment towards your loan’s principal. In response, your lender recalculates your monthly payments based on the new, lower balance, spread over the remaining original term of the loan. This results in a lower monthly payment without changing your interest rate. Our recasting calculator simplifies this by showing you exactly what your new payment would be.

This process is ideal for homeowners who have come into a sum of money (e.g., from an inheritance, bonus, or sale of another asset) and want to reduce their monthly financial obligations rather than paying off their mortgage early. It’s a great alternative to refinancing, especially if you already have a favorable interest rate.

The Recasting Calculator Formula and Explanation

The calculations involved in recasting a mortgage happen in several steps. Our recasting calculator automates this for you, but here’s how it works:

1. Calculate Original Monthly Payment (M): The standard formula is used:

   M = P [i(1+i)^n] / [(1+i)^n - 1]

2. Calculate Remaining Balance: Before the recast, we determine your current loan balance after the payments you’ve already made.
3. Calculate New Principal: This is your remaining balance minus the lump-sum payment you plan to make.
4. Calculate New Monthly Payment: The formula from step 1 is used again, but with the new, lower principal and the remaining loan term.

Formula Variables

Variable	Meaning	Unit	Typical Range
P	Principal Loan Amount	Currency ($)	$50,000 – $1,000,000+
i	Monthly Interest Rate	Percentage (%)	0.2% – 1.5%
n	Number of Payments (Months)	Months	180 (15 years) or 360 (30 years)
L	Lump-Sum Payment	Currency ($)	$10,000+

For more detailed calculations, you could consult a amortization schedule calculator to see the full breakdown.

Practical Examples

Example 1: Mid-Career Professional

Sarah has a $400,000, 30-year mortgage at 6% interest. Five years in (60 payments made), she receives a $50,000 bonus. She uses the recasting calculator to evaluate her options.

• Inputs:
  • Original Loan: $400,000
  • Term: 30 years
  • Interest Rate: 6%
  • Months Paid: 60
  • Lump-Sum: $50,000
• Results:
  • Original Payment: ~$2,398
  • Remaining Balance before lump sum: ~$370,594
  • New Balance after lump sum: ~$320,594
  • New Monthly Payment: ~$2,082
  • Monthly Savings: ~$316

Example 2: Downsizing Homeowners

The Johnsons sell their old home and use some of the proceeds to recast their new one. They want to know what is loan recasting and how it impacts their budget.

• Inputs:
  • Original Loan: $600,000
  • Term: 30 years
  • Interest Rate: 5.5%
  • Months Paid: 12
  • Lump-Sum: $150,000
• Results:
  • Original Payment: ~$3,407
  • Remaining Balance before lump sum: ~$591,850
  • New Balance after lump sum: ~$441,850
  • New Monthly Payment: ~$2,551
  • Monthly Savings: ~$856

How to Use This Recasting Calculator

Using our tool is straightforward. Follow these steps for an accurate analysis of your mortgage recast:

1. Enter Original Loan Details: Input your initial loan amount, the full term in years, and your annual interest rate.
2. Provide Current Status: Fill in how many monthly payments you have already made.
3. Input Lump-Sum Payment: Enter the amount you plan to pay toward the principal.
4. Analyze the Results: The calculator will instantly show your new, lower monthly payment and how much you’ll save each month. The chart and table will provide a visual breakdown.
5. Consider Fees: Remember that lenders often charge a small fee for recasting, typically a few hundred dollars. This calculator focuses on payment savings, but you should factor in that one-time cost.

Key Factors That Affect Recasting

Several factors determine if recasting is the right move for you. Understanding these can help you decide if it aligns with your financial goals, like trying to figure out how to lower monthly mortgage payment.

• Lump-Sum Amount: The larger your principal reduction, the greater your monthly savings will be. Lenders often have a minimum requirement.
• Remaining Loan Term: The new payment is calculated over the *remaining* term. Recasting does not shorten your loan’s end date.
• Current Interest Rate: Recasting is most beneficial when you already have a low interest rate that you want to keep, making it a better option than refinancing when current rates are high.
• Lender Policies: Not all lenders offer recasting, and some loan types (like FHA or VA loans) are often ineligible. Always check with your lender first.
• Financial Goals: If your goal is to free up monthly cash flow, recasting is perfect. If your goal is to pay off the loan as fast as possible, making extra payments without recasting might be a better choice. For a comparison, see an extra mortgage payment calculator.
• Closing Costs and Fees: Recasting is much cheaper than refinancing. There are no closing costs, but expect a processing fee of a few hundred dollars.

Frequently Asked Questions (FAQ)

1. What is the main benefit of using a recasting calculator?

The main benefit is clarity. A recasting calculator instantly quantifies how a large principal payment will reduce your monthly mortgage obligation, helping you make an informed financial decision without complex manual calculations.

2. Does recasting my mortgage change my interest rate?

No, it does not. One of the primary advantages of recasting is that you keep your original loan term and interest rate. This is especially valuable if you have a rate that is lower than current market rates.

3. Is recasting the same as refinancing?

No. Refinancing involves taking out a completely new loan to replace your old one, with a new rate, term, and closing costs. Recasting simply adjusts the payment schedule of your existing loan. To compare options, you might use a refinance calculator.

4. How much does it cost to recast a mortgage?

While much cheaper than refinancing, there is typically a small administrative fee charged by the lender, usually ranging from $150 to $500.

5. Is there a minimum payment required to recast?

Yes, most lenders have a minimum lump-sum payment requirement. This can be a fixed amount (e.g., $10,000) or a percentage of your remaining balance.

6. Will recasting help me pay off my mortgage faster?

No, recasting does not change your loan’s maturity date. Its purpose is to lower your monthly payments, not shorten the loan term. If you want to pay off your loan early, consider using an early mortgage payoff calculator to see how extra payments would work without a recast.

7. Are all loan types eligible for recasting?

No. Government-backed loans like FHA and VA loans are generally not eligible for recasting. It is most commonly available for conventional loans. You must confirm with your lender.

8. How soon after getting a mortgage can I recast it?

Policies vary by lender, but some allow you to recast after just a few months of on-time payments. Others may require a longer payment history.