How the new loan amount, interest rate, term, cash received, and closing costs affect your monthly mortgage payment
A cash-out refinance can turn home equity into cash, but the money you receive does not come from nowhere. It becomes part of a new, larger mortgage balance—and that can materially change your monthly payment and long-term interest cost.
Your new mortgage payment after a cash-out refinance depends primarily on the new loan amount, interest rate, and loan term. Closing costs can also increase the amount you finance or reduce the cash you receive, depending on how the transaction is structured.
The important distinction is between cash in your bank account and the size of your new mortgage. They are related, but they are not the same number.
Quick Answer: How much will your new mortgage payment be after a cash-out refinance? Your payment depends on the new mortgage balance, interest rate, and loan term. Taking cash out generally increases the loan balance, which can raise the payment and total interest. Use the cash-out refinance calculator to model the numbers.
How we approached this analysis We use the Cash-Out Refinance Calculator's stated formulas and assumptions, including maximum LTV, current mortgage balance, new rate, loan term, and estimated closing costs. Payment estimates cover principal and interest only.
TL;DR: What changes your payment after a cash-out refinance?
- The cash you receive increases the new loan balance — a larger mortgage generally means a larger principal-and-interest payment.
- Your interest rate matters as much as the loan amount — refinancing into a higher rate can increase the payment even if the cash-out amount is modest.
- A longer term can reduce the monthly payment — but spreading the balance over more years can substantially increase total interest.
- Closing costs affect the economics — they can reduce the cash received or increase the amount you need to account for when evaluating the refinance.
What determines your new mortgage payment?
A cash-out refinance replaces the existing mortgage with a new loan. The new loan pays off the old mortgage, and the difference can be available as cash, subject to the lender's LTV requirements and transaction costs.
The resulting mortgage payment is calculated from the new loan amount, not simply from the amount of cash you take home.
The basic payment formula
For a fixed-rate loan with monthly payments, the principal-and-interest payment is calculated using:
P × r × (1 + r)ⁿ ÷ [(1 + r)ⁿ − 1]
Where:
- P = new mortgage principal
- r = monthly interest rate
- n = total number of monthly payments
This calculation does not include property taxes, homeowners insurance, HOA dues, mortgage insurance, or other escrowed costs.
Why cash-out increases the mortgage balance
Suppose a home is worth $500,000 and the existing mortgage balance is $300,000.
At an 80% maximum LTV, the maximum new loan would be:
$500,000 × 80% = $400,000
The existing $300,000 mortgage must be paid off first.
That leaves:
$400,000 − $300,000 = $100,000 gross cash-out
If closing costs are $8,000, estimated cash after those costs becomes:
$100,000 − $8,000 = $92,000
The key point is that the new mortgage is $400,000, not $92,000.
That $400,000 balance is what drives the new principal-and-interest payment.
How much does cash-out change your monthly payment?
The easiest way to see the effect is to hold the home's value, rate, and term constant while changing the mortgage balance.
The following examples use a 6.50% fixed rate and 30-year term.
| New loan balance | Approx. monthly P&I |
|---|---|
| $300,000 | $1,896 |
| $325,000 | $2,054 |
| $350,000 | $2,212 |
| $375,000 | $2,370 |
| $400,000 | $2,528 |
Illustrative — actual results vary.
Moving from a $300,000 balance to a $400,000 balance adds roughly $632 per month in principal and interest under these assumptions.
That does not mean the entire $100,000 difference is necessarily cash in hand. The new balance also reflects the amount needed to pay off the existing mortgage and any costs that are financed as part of the transaction.
What happens when you take more cash out?
A useful way to evaluate a cash-out refinance is to ask:
How much additional debt am I taking on to get the cash I need?
Consider a $500,000 home with a $300,000 existing mortgage and an 80% maximum LTV.
The maximum new mortgage is $400,000. Different cash-out amounts would require different new balances if the transaction is structured accordingly.
| Gross cash-out | Existing mortgage paid off | New loan balance | Approx. P&I at 6.50%, 30 years |
|---|---|---|---|
| $50,000 | $300,000 | $350,000 | $2,212 |
| $75,000 | $300,000 | $375,000 | $2,370 |
| $100,000 | $300,000 | $400,000 | $2,528 |
Illustrative — actual results vary. This table assumes the stated cash-out amount is added to the existing payoff and does not separately model financed closing costs.
The relationship is straightforward: more cash-out generally means a larger mortgage balance.
But the monthly payment is only one part of the decision. A larger balance also creates additional interest expense over the life of the loan.
Does a lower interest rate always mean a lower payment?
Not necessarily.
A cash-out refinance can involve two competing changes:
- The interest rate may change.
- The mortgage balance may increase.
If the new rate is lower but the new mortgage is substantially larger, the resulting payment could still be higher than the current payment.
For example, assume the current mortgage balance is $300,000.
At 7.50% over 30 years, principal and interest would be roughly $2,098 per month.
A cash-out refinance that creates a $400,000 mortgage at 6.50% would have a payment of about $2,528 per month.
So the new rate is lower, but the new payment is higher because the loan balance increased by $100,000.
⚠️ A lower refinance rate does not automatically mean a lower monthly payment. Compare both the interest rate and the new principal balance.
How does the loan term affect a cash-out refinance payment?
The loan term can dramatically change the monthly payment and total interest.
Consider the same $400,000 mortgage at 6.50%, but with different repayment periods.
| Loan term | Approx. monthly P&I | Approx. total interest |
|---|---|---|
| 15 years | $3,484 | $227,000 |
| 20 years | $2,982 | $315,700 |
| 30 years | $2,528 | $510,200 |
Illustrative — actual results vary. Total interest is rounded.
A 30-year term produces the lowest monthly payment in this example, but it also results in substantially more interest over the full repayment period.
A shorter term works differently: the payment is higher, but the balance is repaid much faster.
The trade-off
Choosing a loan term is therefore not simply a question of finding the smallest monthly payment.
It is a trade-off between:
- monthly cash flow
- speed of debt repayment
- total interest
- how long the borrower expects to keep the new mortgage
If the primary objective is lower monthly obligations, a longer term may produce a lower payment. If reducing lifetime interest is more important, a shorter term changes the calculation.
How much cash will you actually receive?
The amount of cash you receive can be lower than the difference between the maximum new loan and the existing mortgage.
Closing costs are one reason.
Using the calculator's default example:
- Home value: $500,000
- Current mortgage: $300,000
- Maximum LTV: 80%
- Maximum new loan: $400,000
- Gross cash-out: $100,000
- Closing costs: $8,000
- Estimated cash after costs: $92,000
The mortgage payment is calculated using the $400,000 new loan, while the estimated cash received after closing costs is $92,000.
This distinction matters when evaluating whether the transaction accomplishes the intended goal.
Cash received vs. new mortgage balance
| Metric | Amount |
|---|---|
| Home value | $500,000 |
| Existing mortgage balance | $300,000 |
| Maximum new loan at 80% LTV | $400,000 |
| Gross cash-out | $100,000 |
| Closing costs | $8,000 |
| Estimated cash after costs | $92,000 |
| New mortgage principal | $400,000 |
| Approx. monthly P&I at 6.50%, 30 years | $2,528 |
Illustrative — actual results vary.
This is why comparing only the cash received can give an incomplete picture.
The borrower receives an estimated $92,000, but takes on a new mortgage of $400,000 under this example.
What if closing costs are financed?
Closing costs can be handled differently depending on the transaction.
If costs are paid separately, they reduce the borrower's available cash but do not necessarily increase the mortgage principal.
If costs are incorporated into the new loan, the resulting mortgage balance can be higher, subject to applicable LTV and loan-program limits.
That creates an important distinction when using a cash-out refinance calculator:
Cash after closing costs and final loan balance are separate concepts.
The FinCalWise calculator subtracts entered closing costs when estimating net cash. It does not assume that closing costs are automatically financed into the mortgage.
How much does the new mortgage cost over time?
The monthly payment can make a refinance look manageable while the long-term interest cost tells a different story.
For the calculator's $400,000 example at 6.50% for 30 years, the estimated principal-and-interest payment is approximately $2,528.27 per month.
Over 30 years, the estimated total interest is approximately $510,177.95.
Adding the $8,000 entered closing costs gives an estimated financing cost of approximately:
$518,177.95
This is a planning estimate based on the new loan.
⚠️ It is not the same as the incremental cost of refinancing. To determine whether refinancing is financially attractive, you would also need to compare the proposed loan against keeping the existing mortgage, including the existing rate, remaining term, payment, and future interest.
How to compare your current mortgage with the new one
A cash-out refinance should generally be evaluated as a before-and-after scenario, not as a standalone payment.
Collect these figures for the existing mortgage:
- Current mortgage balance
- Current interest rate
- Current monthly principal-and-interest payment
- Remaining loan term
- Estimated remaining interest
Then model the proposed refinance:
- New mortgage balance
- New interest rate
- New loan term
- Closing costs
- Cash received
- New principal-and-interest payment
- Estimated total interest
Once those figures are available, the trade-offs become easier to see.
For example, a refinance could produce useful liquidity while increasing the monthly payment. Another scenario could lower the rate but extend the repayment period, changing the total interest cost.
The relevant question is therefore not simply "What will my new payment be?"
It is "What am I giving up in future mortgage costs in exchange for the cash I receive today?"
When does a higher payment make sense?
There is no single payment threshold that determines whether a cash-out refinance is appropriate.
The purpose of the cash matters.
Someone using the proceeds for a large planned expense may evaluate the transaction differently from someone using the proceeds to consolidate higher-cost debt. The interest rate on the alternative debt, tax considerations, liquidity needs, and expected time in the property can all affect the analysis.
The calculator can quantify the mortgage side of the decision, but it does not determine whether a particular use of cash is financially beneficial.
A practical comparison
Suppose a refinance increases the mortgage payment by $500 per month.
That figure alone does not tell you whether the transaction works.
You would also want to know:
- How much cash the refinance provides
- What the cash will be used for
- What alternative financing would cost
- How long you expect to keep the new mortgage
- How much additional interest the new mortgage creates
- Whether the higher payment fits the household budget
This turns the refinance from a simple rate comparison into a broader financing decision.
How to estimate your cash-out refinance payment
You can calculate a rough payment manually, but a calculator makes it easier to test different assumptions.
Step 1: Estimate your maximum new mortgage
Multiply the home's estimated value by the maximum LTV used for the scenario.
$500,000 × 80% = $400,000
Step 2: Subtract the existing mortgage
$400,000 − $300,000 = $100,000 gross cash-out
Step 3: Account for closing costs
With $8,000 in estimated costs:
$100,000 − $8,000 = $92,000 estimated cash after costs
Step 4: Calculate the new payment
Use the new mortgage balance, interest rate, and term.
At $400,000, 6.50%, and 30 years, the estimated principal-and-interest payment is about $2,528.27 per month.
Step 5: Compare the new loan with the existing mortgage
The final step is the one most likely to change the decision.
Compare the new payment, interest cost, cash received, and loan term with the mortgage that would remain in place if you did not refinance.
Model your cash-out refinance before focusing on the payment
The monthly payment is important, but it is only one output.
A useful scenario should show at least four numbers together:
new mortgage balance + cash received + monthly P&I + estimated total interest
That combination shows both the immediate liquidity and the long-term financing commitment.
You can run your numbers with the cash-out refinance calculator and change the home value, mortgage balance, LTV, interest rate, term, and closing costs to see how the scenario changes.
👉 Calculate Your Cash-Out Refinance Payment
👉 Calculate your cash-out refinance payment
The calculator estimates your maximum new loan, gross cash-out, cash after closing costs, resulting LTV, monthly principal-and-interest payment, and estimated total interest from the assumptions you enter.
Related calculators
- loan-to-value calculator — see how your mortgage balance compares with the home's value.
- mortgage refinance calculator — compare the payment and cost implications of refinancing.
- mortgage calculator — estimate principal and interest payments for a mortgage.
FAQ
How much will my mortgage payment increase with a cash-out refinance?
It depends on how much the new mortgage balance increases, along with the new interest rate and loan term. Taking $100,000 in additional mortgage principal can produce a substantially different payment depending on the rate and repayment period.
What is the monthly payment on a $400,000 cash-out refinance?
At 6.50% for 30 years, a $400,000 fixed-rate mortgage has an estimated principal-and-interest payment of approximately $2,528.27 per month. Taxes, insurance, HOA dues, and other housing costs are not included.
Does cash-out refinancing increase your mortgage payment?
It can. Cash-out refinancing often creates a larger mortgage balance because the new loan pays off the existing mortgage and provides additional proceeds to the borrower.
How does a cash-out refinance affect total interest?
A larger mortgage balance can increase total interest, while a longer repayment term can increase the number of months over which interest accrues. The new interest rate also has a major effect on the total cost.
Is a 30-year or 15-year cash-out refinance better for monthly payments?
A 30-year loan generally produces a lower monthly principal-and-interest payment than a 15-year loan for the same balance and rate. However, the longer term can result in substantially more total interest.
Does the cash-out amount equal the increase in my mortgage balance?
Not necessarily. Closing costs, the way costs are paid, and the structure of the transaction can affect the relationship between cash received and the resulting loan balance.
Should I compare my old mortgage payment with the new cash-out refinance payment?
Yes. The comparison should include more than the monthly payment: consider the current balance, remaining term, existing rate, new rate, new balance, closing costs, cash received, and estimated interest over the relevant period.
Key Takeaways
- Your new mortgage payment is based on the new loan balance, rate, and term — not simply on the amount of cash you receive.
- Cash-out increases the amount of mortgage debt when the new loan is larger than the existing payoff.
- A lower interest rate does not guarantee a lower payment because the new mortgage balance may be substantially higher.
- A longer loan term can reduce monthly payments while increasing total interest over the life of the loan.
- Closing costs affect the real economics of the transaction and can reduce estimated cash received or affect the amount financed.
- Cash-out refinance calculator — model the new mortgage balance, cash received, monthly payment, LTV, and estimated interest using your own assumptions.
This article is for informational purposes only and does not constitute financial advice. Please consult a qualified financial advisor before making cash-out refinance decisions.