Extra Payment Calculator.

Save Even More on Your San Diego Mortgage

In addition to making extra payments another great way to save money is to lock-in historically low interest rates. After the COVID-19 crisis the FOMC dropped the Fed Funds Rate to zero and issued forward guidance suggesting they would not lift rates through 2023. 2020 has been a record year for mortgage originations as many homeowners refinanced to take advance of low rates and lower their monthly payments. Current San Diego mortgage rates are published beneath this calculator.


Making Additional Home Loan Payments?

Accelerated Repayment Can Save You Money!

Shave years off your loan and save money by paying more than your regularly scheduled amount. How much money can you save? Find out now. Fill out this calculator, including the additional amount and the number of times you will make that increased contribution each year. The calculation results will show how much interest you save & how much quicker your loan will be paid off.

The second tab contains usage instructions and examples for entering recurring payments, one-time payments, or a combination of the two.

Home Price & Downpayment Amount
Home price: $
Down payment: $
Loan amount:$
Original Mortgage Terms Amount
Loan term: years
Start date of mortgage:
PMI: %
Interest rate (APR %): %
Other Ownership Costs Amount
Annual real estate taxes:$ / yr
Homeowner's insurance:$ / yr
Monthly HOA dues:$ / mo
Recurring Extra Payments Amount
Extra payments start date:
Extra payment amount:$
Frequency of Additional Contributions: / yr
One-Time Extra Payment Amount
Date of lump sum extra payment:
Lump sum extra payment:$

Advantages of Additional Payments on Your 4.5% APR $260,000.00 Home Loan
Lock-in San Diego's Low Refinance Rates Today

No Extra Payments

With Extra Payments


Monthly P&I Payment
$1,800.72 including other expenses


Equivalent Monthly P&I Payment
$2,300.72 including other expenses

30 years

Pay-off time

18 years 4 months

Pay-off time


Interest Paid


Interest Paid

11 years 8 months

Time Saved Making Extra Payments


Total Interest Savings With Extra Payments

Usage Instructions

Enter your original mortgage information along with your extra payments using the calculator below to see how much interest you will save and how much sooner your loan will be paid off in full. Click the following section for more information on how to enter a one-off extra payment or recurring extra payments.

Recurring Extra Payments

For your convenience the following table lists how many times per year is associated with common extra payment frequencies. You can enter the associated frequency along with your payment amount in the recurring portion of the calculator below.

Frequency Extra Payments Per Year
Annually 1
Semi-annually 2
Quarterly 4
Bi-monthly 6
Monthly 12
Semi-monthly 24
Bi-weekly 26
Weekly 52
Daily 365
Single / Lump Sum Enter in one-time box

If your additional payments are made more frequently than monthly, the amortization table will show those extra payments as being rolled into your monthly payments. A weekly, bimonthly or other extra payment will be automatically converted into the monthly equivalent amount. For example, $100 added every week would be converted to $433.33 per month & that amount will be added to each monthly payment. We formatted the output tables in this manner to make it easy to see the year-by-year progress in the loan amortization table. The summary table has the core principal & interest payment in large font, while the total monthly homeownership cost with other expenses like PMI, homeowners insurance, property taxes & HOA fees is listed beneath it.

One-time Extra Payment

  • If you are making a lump sum extra payment enter the amount of the payment and the date of it in the calculator below.
  • If you are not making recurring extra payments you can enter zeros in the recurring section & enter your extra payment details in the one-time extra payment section.
  • If you are making recurring extra payments but no one-time payment then enter your details in the recurring section & set the one-time payment to zero.
  • If you are making both recurring payments AND a one-time payment you can enter both in the calculator below, though make sure you select the correct dates for each.

Use Both Extra Payment Types

You can calculate both recurring extra payments & an additional lump sum payment by entering the details for each in the calculator. Find more detailed instructions for how to enter each type of payment in the associated sections above.

Save Money By Refinancing Your 4.5% APR 30-year $260,000.00 Home Loan Today

The following table highlights current San Diego mortgage rates. By default 30-year refinance loans are displayed. Clicking on the purchase button switches loans to new home purchases. Other loan adjustment options including price, down payment, home location, credit score, term & ARM options are available for selection in the filters area at the top of the table.

Annual Amortization Schedule for Your $260,000 Home Loan With Extra Payments

Example table for a loan which began in November of 2022, with extra payments beginning 2 years later.

Beginning Year No Extra Payments With Extra Payments
2023 $259,275.85 $259,275.85
2024 $254,823.03 $254,823.03
2025 $250,179.55 $249,177.80
2026 $245,337.24 $238,175.74
2027 $240,287.60 $226,702.60
2028 $235,021.75 $214,738.21
2029 $229,530.42 $202,261.52
2030 $223,803.96 $189,250.60
2031 $217,832.30 $175,682.58
2032 $211,604.96 $161,533.61
2033 $205,110.97 $146,778.80
2034 $198,338.92 $131,392.23
2035 $191,276.90 $115,346.83
2036 $183,912.50 $98,614.40
2037 $176,232.78 $81,165.52
2038 $168,224.22 $62,969.52
2039 $159,872.75 $43,994.39
2040 $151,163.69 $24,206.80
2041 $142,081.73 $3,571.93
2042 $132,610.89 $0.00
2043 $122,734.53 $0.00
2044 $112,435.28 $0.00
2045 $101,695.05 $0.00
2046 $90,494.93 $0.00
2047 $78,815.25 $0.00
2048 $66,635.47 $0.00
2049 $53,934.17 $0.00
2050 $40,689.03 $0.00
2051 $26,876.77 $0.00
2052 $12,473.08 $0.00
2053 $0.00 $0.00

Maximize Your Mortgage Savings with Additional Payments

When you first obtain a home loan, you were probably not thinking about paying it off early (at least not yet). After all, you chose your payment schedule to suit your income and your lifestyle. And like most people, you probably chose the option with the most affordable monthly payments.

Why 30-Year Fixed Mortgages Are Popular

Homebuyers usually choose 30-year fixed-rate loans because they come with cheaper payments. The Urban Institute reported that 30-year fixed mortgages comprised 73.9% of new loan originations as of August 2020 in the housing market. Meanwhile, shorter loans such as 15-year fixed mortgages only took up 16% of the market share. Shorter terms come with higher mortgage payments, which may not fit into everyone’s budget. But note that 15-year fixed mortgage rates are lower by 0.25% to 1% than 30-year fixed-rate loans. The lower rate and shorter term results in cheaper interest charges.


While three decades is a long time, you probably didn’t mind as long as you got a mortgage with affordable payments. If you had low to moderate income, a 30-year fixed loan was probably your only available option. But as with all loans, the more you pay today, the less you pay tomorrow. You realize you’ll end up paying more interest with a longer loan. You could even be paying your mortgage well into retirement.

But over the years, perhaps your salary increased after a promotion or success from a business. As you build your income, you’ll have extra money for savings and other important expenses. And once you do, consider making extra payments toward your mortgage. Making extra payments can help you save on interest charges and pay off your mortgage early. Read on to learn how additional mortgage payments can work for you.

Factors That Impact Mortgage Payments

To understand how extra payments can help you save, let’s review factors that determine monthly principal and interest (P+I) payments. Monthly P+I payments depend on three key variables:

  1. The size of your principal – this is your actual loan amount
  2. Interest rate – based on the annual percentage rate (APR)
  3. Payment term – the length of time it takes to pay off your loan

When your principal and interest rate is high, your monthly payment increases. And if you extend the payment term, your monthly payment decreases. But don’t think you’re paying less. Because it takes a longer time to pay, it generates higher interest charges. Likewise, when you shorten the term, it raises your monthly payments but significantly decreases interest charges.

To help you understand how this works, let’s take the example below. The following chart compares a 30-year fixed mortgage with a 15-year fixed-rate loan. Notice how the extended term results in expensive interest charges despite the affordable monthly payment.

Loan Amount: $288,000

Mortgage30-Year Fixed15-Year FixedDifference
Rate (APR)3.5%3.2%0.3%
Monthly Payment$1,293.25$2,016.69$1,887.44
Total Interest Cost$177,569.53$75,005.04$102,564.49

According to the chart, the 30-year fixed mortgage monthly payment is $1,887.44 cheaper than the 15-year fixed-rate loan. However, because the 30-year fixed term is twice as long as a 15-year mortgage, it generates a total of $177,569.53 interest charges. This is $102,564.49 more expensive than a 15-year fixed loan, which only charged $75,005.04 in overall interest.

On the other hand, the 15-year fixed term’s monthly payment is almost twice the amount of the 30-year fixed mortgage. Many homebuyers with limited funds cannot afford to make such expensive payments. If you don’t have a stellar credit history, you may not qualify for a shorter term.

However, don’t worry. This is where extra mortgage payments come in handy. It’s an alternative way to shorten your loan and reduce your interest costs. Use it as a financial strategy to shave years off your mortgage, especially if you cannot refinance into a 15-year term.

Compared to a 15-year term, paying extra gives you the freedom to decide how much you can add to your mortgage payments. This can be as small as $50 a month, $200 a month, or even a large lump sum amount. It does not cause financial strain on your budget. For example, if you can only afford an extra $100 this month, it’s no problem. On the other hand, if you fail to cover monthly payments for a 15-year term, it puts you at risk of default. Thus, extra payments are the safer option if your budget is really tight.

Learn About Prepayment Penalty

As a precaution, ask your loan servicer about prepayment penalty first. This is charged when you pay all or a significant part of your mortgage before the agreed date. Expensive penalty fees negate interest savings you make from extra payments. You can wait a couple of years before making extra payments, since most prepayment penalties on mortgages only take effect for the first 3 years. Some lenders may allow you to prepay up 20% of your principal, after which the penalty is triggered. Small extra payments usually do not prompt penalty fees, but it’s best to check with your loan servicer.


Lenders impose prepayment penalties to discourage consumers from prepaying their loan, selling their home early, or refinancing their mortgage. Early repayment means lenders lose profits they could have earned from interest.

Prior to 2014, some conventional lenders required steep prepayment penalties that stretched for the entire loan. But to protect consumers, the CFPB placed rules that only allowed prepayment penalties for the first 3 years of a mortgage. However, for loans that originated before 2014, this law is not retroactive. If you took a mortgage before 2014, learn more about your prepayment penalty rules.

Conventional mortgages usually have a prepayment penalty clause, though you can choose a loan without one. On the other hand, government-backed loans such as FHA loans, VA loans, and USDA loans do not impose prepayment penalties. You can make additional payments without worrying about expensive costs.

Understanding How Extra Mortgage Payments Work

Wooden house with money beside it.

Additional mortgage payments have the greatest effect when you apply them early. This is another reason why lenders discourage extra payments for the first 3 years of a loan. Since your principal is largest during this time, it generates high interest charges. If you make extra payments at the beginning of your mortgage, this significantly diminishes the principal, therefore reducing your interest charges. It lowers future interest on your mortgage.

To show you how this works, let’s compare two 30-year fixed mortgages with the same variables. The first one makes extra payments at the start of the term, while the second one starts making extra payments by the sixth year. We used the calculator on top the determine the results.

30-Year Fixed Mortgage
Principal Loan Amount: $288,000
Rate (APR): 3.5%
Extra Payment: $100 per month

LoanOriginal Amount1st Year Start of Extra Payments6th Year Start of Extra Payments
Monthly Payment$1,257.33$1,357.33$1,357.33
Overall Interest$172,637.05$148,988.61$157,018.39
Pay-off Time30 years26 years 5 months27 years 3 months
Time SavedNone3 years 7 months2 years 9 months
Interest SavedNone$23,648.44$15,618.66

*All calculations above and below only account for principal and interest (P+I); they do not include property taxes and home insurance.

According to the results, you’ll prepay your mortgage by 3 years and 7 months if you make extra payments of $100 at the start of your mortgage. Meanwhile, you’ll cut 2 years and 9 months from your term when you start making extra payments by the 6th year. While both scenarios shorten your payment term, making additional payments at the beginning of your mortgage saves more time.

Furthermore, you’ll save considerably more on interest charges the earlier you make extra payments. Based on our example, you’ll save $23,648.44 on total interest if you make extra payments at the start of your mortgage. Meanwhile, you’ll save $15,618.66 on total interest if you make additional payments on the 6th year. And though it’s lower, this is still a considerable sum. That’s money that can go to your emergency savings, home repairs, or retirement funds. Consider making extra payments even after a couple of years has passed on your loan.

Each small extra payment does not make a huge difference immediately. However, it has a compounding impact over the life of the loan. For example, a 5% rate of interest on a payment of $1,200 will save $5 in monthly interest expenses. Over 30 years, that can amount to $1,800 in interest savings.

Apply Extra Payments Toward Your Principal

Specifically ask your lender to apply extra payments toward your principal. Some lenders may automatically pay extra payments toward interest first, so it’s best to give them instructions. Meanwhile, other lenders may charge added fees when you request principal-only payments. If this is the case, check if the added cost won’t cancel any savings from making direct principal payments.


Next, consider increasing your extra payments if you have enough room in your budget. Logically, this will further reduce your interest charges and shave more years off your payment term. If you can’t make higher extra payments right away, you can start off with $50 a month, then you can increase it to $100, $150, and so on.

Using our calculator above, let’s compare how much time and money you can save based on your extra payment amount. For example, suppose your home is priced at $325,000 and you made a down payment worth $65,000. You took a 30-year fixed mortgage at 3.5% APR and your principal loan amount is $260,000. You decide to start making extra payments on the third year of your loan. The following chart estimates how much you’ll save if you pay an extra $50, $100, or $200 per month.

30-Year Fixed Mortgage
Principal Loan Amount: $260,000
Rate (APR): 3.5%

LoanOriginal PaymentExtra $50 / monthExtra $100 / monthExtra $200 / month
Monthly Payment (P+I)$1,167.52$1,217.52$1,267.52$1,367.52
Pay-off Time30 years28 years 2 months26 years 6 months23 years 10 months
Time Saved01 year 10 months3 years 6 months6 years 2 months
Total Interest$160,305.83$149,526.42$140,324.39$125,415.21
Total Interest Savings0$10,779.41$19,981.44$34,890.61

The results show that you’ll make the most interest savings if you pay $200 per month on your mortgage. You’ll save a total of $34,890.61 on interest charges and you’ll pay off your loan within 23 years and 6 months. With just $200 per month, you removed 6 years and two months off your mortgage. On the other hand, if you decide to pay extra $100 per month, you’ll save $19,981.44 on total interest costs. You’ll pay off your mortgage earlier by 3 years and 6 months. Finally, if you set aside $50 per month for extra mortgage payments, you’ll remove 1 year and 10 months off your payment term. You’ll also save a total of $10,779.41 on interest charges.

While a larger amount helps reduce your payment term, it’s worth noting that even small amounts can still help you avoid thousands worth of interest charges. Even if it’s just $50 or less, it’s worth making additional payments on your mortgage.

Different Ways to Apply Additional Payments

Besides extra monthly payments, there are other payment strategies you can adapt to reduce your mortgage term. These include making lump sum payments or shifting to a biweekly payment schedule while making additional payments. Here are different payment methods you can try:

Make a 13th Loan Payment Each Year

Most homeowners normally make monthly mortgage payments, which is equivalent to 12 payments annually. To pay extra on your mortgage, you can make an additional 13th payment. To make it easier, you can time this when you get large work bonuses or tax returns within the year. It’s a good way to use extra funds instead of completely splurging on other expenses. You can make your 13th payment at the beginning of the year or towards the end of the year.

The following example shows how much time and money you can save when you make a 13th mortgage payment every year, starting from the first year of your loan. You can also use the calculator on top to estimate extra payments you make once a year.

30-Year Fixed Mortgage
Principal Loan Amount: $260,000
Rate (APR): 3.5%

LoanOriginal PaymentWith 13th Payment Each Year
Extra Mortgage Payment0$1,167.52 (once a year)
Monthly Payment (P+I)$1,167.52$1,167.52
Pay-off Time30 years26 years 3 months
Time Saved03 years 9 months
Total Interest$160,305.83$137,454.16
Total Interest Savings0$22,851.67

In this example, the results show you can save $22,851.67 on interest charges by making a 13th mortgage payment each year. You’ll pay down your loan early by 3 years and 9 months.

Make a One-Time Lump-Sum Contribution

Pile of dollar bills.

Another payment strategy you can do is to make a large lump-sum payment. If you get an unexpected bonus from work or an inheritance, you can quickly apply it toward the principal owed on your home. Now and then, you might stumble upon funds left by one of your relatives. You might even receive a windfall from your business. Use this large fund to shorten your mortgage term and diminish your interest costs. Likewise, if you keep making extra monthly mortgage payments, this will further reduce your term and interest charges.

The above calculator supports recurring weekly, biweekly, monthly, quarterly, or annual payments along with one-off lump sum contributions. Make sure you enter the frequency of contribution you would like to make, when the contribution begins, and the amount of each contribution. Then click on the ‘calculate’ button to quickly see how much you’ll save.

The following chart shows how much you can save based on a one-time lump-sum payment of $60,000. The payment is applied during the third year of the loan.

30-Year Fixed Mortgage
Principal Loan Amount: $260,000
Rate (APR): 3.5%

LoanOriginal PaymentLump-Sum Payment
Extra Mortgage Payment0$60,000 (one-time payment)
Monthly Payment (P+I)$1,167.52$1,167.52
Pay-off Time30 years20 years 6 months
Time Saved09 years 6 months
Total Interest$160,305.83$86,096.56
Total Interest Savings0$74,209.27

The example shows that if you make a $60,000 lump-sum payment on your mortgage during the third year, you’ll save a total of $74,209.27 on interest costs. This large amount will cut 9 years and 6 months from your payment term. You’ll get to pay off your mortgage almost 10 years earlier.

Is it Better to Pay Extra Monthly or All at Once?

In general, the sooner you make extra payments the more money you will save. If you pay extra right away, whatever amount your balance is reduced won’t accumulate interest for the remaining life of your loan.

For example, if you have the ability to pay an extra $1,200, you’re better off paying it today to immediately lower your balance. This is better than having it stretched out at $100 per month. If you have $200 saved up today and can save $100 a month, it wouldn’t make sense to wait 10 months to add $1,200 to a mortgage payment. Again, you’re better off paying whatever extra amount you have now.


Winning with Bi-Weekly Payments

Bi-weekly payments are another way to create the equivalent of a 13th month payment. There are 52 weeks in a year, which means there are 26 biweekly periods. If you pay half of your monthly payment 26 times a year, it’s equivalent to making 13 monthly payments. Plus, nothing prevents you from combining bi-weekly payments with other extra payments. If your salary comes in a bi-weekly schedule, you can time this with your mortgage payments. You can also set automated transfers during payday to ensure you don’t forget mortgage payments.

Avoid Extra Costs for a Bi-Weekly Schedule

Some banks charge a fee for managing biweekly payments. In some cases, those fees may exceed any interest savings. Banks that do not offer bi-weekly payment schedules may require you to sign up for a third-party payment processing service. They require setup fees which add extra costs. Many of these services may also take your payments but not apply the bi-weekly schedule. So before you agree, make sure your payments are applied properly.


The following chart shows how much you can save by making extra biweekly payments worth $50 or $200 on your mortgage. This presumes you’re making bi-weekly payments at the start of your loan.

30-Year Fixed Mortgage
Principal Loan Amount: $260,000
Rate (APR): 3.5%
Monthly Payment: $1,167.52
Biweekly Payment: $583.76

LoanMonthly PaymentBi-weekly with Extra $50Bi-weekly with Extra $200
Periodic Payment (P+I)$1,167.52$633.76$783.76
Pay-off Time30 years24 years 6 months23 years
Time Saved06 years 6 months7 years
Total Interest$160,305.83$119,177$85,213
Total Interest Savings0$41,128$75,092

According to this example, if you choose a bi-weekly payment plan and pay an extra $50 every pay period, you’ll save $41,128 on total interest charges. You’ll also shorten your payment term to 24 years and 6 months. Meanwhile, if you have a bi-weekly payment schedule and pay an extra $200 on every pay period, you’ll save $75,092. Adding $200 on your bi-weekly mortgage payments shortens your term by 7 years.

What if I can’t arrange bi-weekly payments? In some cases, your lender might not offer a bi-weekly payment schedule. But don’t fret. You can still produce a similar effect by adding a specific amount to your monthly mortgage payments. Take the amount of your mortgage payment and divide it by 12. The following amount is the extra payment that must be applied to your principal each month.

For instance, your monthly mortgage payment is $1,167.52. If we divide it by 12, the resulting amount will be $97.30. This is the extra payment you must make on your mortgage per month. Likewise, if you can spare extra funds, increasing the amount will yield more interest savings.

Prioritize Your Finances

While making extra payments to your mortgage is advantageous, there are cases where it’s better to allocate your money towards other important expenses. Making extra mortgage payments can eat up a large part of your monthly budget, which means you have less money going toward savings. This can prevent you from making valuable purchases or investing in lucrative business ventures.

Financial experts suggest families should have at least 6 months to a year’s worth of expenses in emergency funds. If you prioritize your mortgage, you might not have enough for a rainy day. Moreover, you should also think about having enough savings for your retirement fund.

Next, if you have other high interest debts, such as credit card bills, it makes sense to prioritize them first. After all, unsecured debt such as credit cards are not tax deductible. Interest on mortgage, on the other hand, is tax deductible. High interest debt will also eat away your savings, so make sure to pay them down first.

Finally, do you have immediate expenses you need to take care of? Things like childcare services and having your home or car repaired should be the priority. If your budget does not leave extra money for your mortgage, that’s alright. You can try again next time when you have even a little to spare. Make sure to reflect on your financial goals before dedicating a significant portion of your salary to your home loan.

In Summary

Browsing houses via laptop.

Making extra mortgage payments are a good way to reduce your interest charges and shorten your term. It’s a viable option if you have extra income but cannot afford to refinance to a shorter term. But before you make additional mortgage payments, make sure to ask your lender about prepayment penalty. Paying expensive penalty fees defeats the purpose of gaining savings on extra payments.

There are different ways you can apply extra payments. The easiest way is to make additional monthly payments to your mortgage. If you have a windfall, you can put a one-time lump-sum payment toward your mortgage. In other cases, you can take a bi-weekly payment plan and make extra payments to pay off your mortgage faster. Whatever strategy you take depends on your preference.

Some people struggle with discipline, while others prefer a fixed routine. One person might find it easier to automatically pay a bit more each month, while another might get a sense of accomplishment by making a larger payment at once. At the end of the day, you should choose the method that helps you keep paying extra. Automated habits routinely beat out our best stated intentions.

San Diego Borrowers: Are You Unsure Which Loans You'll Qualify For?

We have partnered with Mortgage Research Center to help San Diego homebuyers and refinancers find out what loan programs they are qualified for and connect them with San Diego lenders offering competitive interest rates.