Piggyback Mortgage Calculator
Compare 80/10/10 vs 80/15/5 loan structures & save on PMI
This piggyback loan calculator helps you decide if a second mortgage can help you avoid Private Mortgage Insurance (PMI) and save money. Enter your details below to compare your financing options.
Piggyback Loans vs. PMI: Which Financing Strategy Saves You More?
A piggyback mortgage involves securing two separate loans to finance your home purchase. The primary goal is to avoid Private Mortgage Insurance (PMI) - an added monthly cost that lenders require when your down payment is less than 20%. By keeping your first mortgage at or below 80% of the home's value (the Loan-to-Value ratio, or LTV), you eliminate PMI entirely.
But is a piggyback loan right for you? The answer depends on interest rates, your credit profile, and how long you plan to stay in the home. This piggyback mortgage calculator helps you crunch the numbers and make an informed decision.
How to Use This Piggyback Mortgage Calculator
Using this piggyback loan calculator is straightforward:
- Enter the home price - the total purchase price of the property you're considering.
- Choose your down payment type - enter either a percentage or a dollar amount.
- Enter interest rates - the rate for both your first mortgage and second mortgage.
- Set loan terms - the number of years for each mortgage (30-year first, 15-year second is typical).
- Select "Interest Only" if your second mortgage is a HELOC with interest-only payments.
- Click "Calculate" to see your total monthly payment, combined LTV, and whether PMI is required.
The calculator also shows a loan breakdown with your first mortgage amount, second mortgage amount, and down payment details. This is a crucial step before you discuss conventional loan requirements with a lender.
Understanding 80/10/10 vs 80/15/5 Piggyback Structures
| Feature | 80/10/10 Structure | 80/15/5 Structure |
|---|---|---|
| First Mortgage | 80% of home value | 80% of home value |
| Second Mortgage | 10% of home value | 15% of home value |
| Down Payment | 10% of home value | 5% of home value |
| Combined LTV | 90% | 95% |
| PMI Required? | No (first mortgage stays at 80%) | No (first mortgage stays at 80%) |
| Best For | Borrowers with 10% down payment available | Borrowers with limited down payment funds |
80/10/10 is the most common piggyback structure. It requires a 10% down payment, which is more manageable than 20%, while still avoiding PMI. The 80/15/5 structure requires only 5% down, making it attractive for borrowers with limited savings, but the larger second mortgage typically carries a higher interest rate.
✅ Pros of Piggyback Loans
- Avoid PMI - Save hundreds monthly on mortgage insurance
- Lower down payment - Get into a home with 5-10% down
- Tax-deductible interest - Both mortgages may be tax-deductible (consult your tax advisor)
- Flexible structure - Choose between 80/10/10 or 80/15/5
- Second mortgage can be HELOC - Use it as a line of credit for future needs
❌ Cons of Piggyback Loans
- Higher second mortgage rate - Second loans typically have higher interest rates
- Two closings - May require separate closing costs
- Credit score requirements - Often need 680+ credit score
- HELOC rates can adjust - Variable rates may increase over time
- More complex - Managing two loans can be more complicated
Key Factors That Affect Your Piggyback Loan Decision
1. Credit Score Requirements
Piggyback loans typically require a stronger credit profile. Most lenders look for credit scores of 680 or higher to qualify for 80/10/10 or 80/15/5 structures. Some may require 700+ for the best rates. Check your conventional loan credit score requirements to see where you stand.
2. Second Mortgage Options: Fixed vs. HELOC
Your second mortgage could be a fixed-rate loan or a Home Equity Line of Credit (HELOC). A HELOC often has a variable interest rate, which means your payment could change over time. Our calculator includes an "Interest Only" checkbox to help you model a HELOC scenario. Factor this risk into your decision.
3. Combined LTV (CLTV) and Lender Requirements
Lenders look at the combined LTV (CLTV) of both mortgages. Keeping this ratio in a healthy range is key to getting approved and managing your overall risk. Most piggyback structures target a CLTV of 90-95% (80% first + 10-15% second). A lower CLTV generally means better rates and easier approval.
4. How Long Will You Stay in the Home?
If you plan to stay in your home for 5+ years, a piggyback loan can save you significant money compared to PMI. However, if you plan to move within 2-3 years, the closing costs and higher second mortgage rate might not be worth it. This calculator helps you compare the total cost of both scenarios over time.
Additional Mortgage Resources
Explore these helpful calculators and guides to make informed mortgage decisions:
- Home Affordability Calculator - Find out how much home you can afford based on your income and debts
- Cash-Out Refinance Calculator - Calculate your new payment and cash-out amount
- Rate/Term Refinance Calculator - Compare refinance options to lower your rate
- Understanding PMI - Learn how PMI affects your mortgage payments
- When Does PMI Go Away? - Know when you can cancel mortgage insurance
Frequently Asked Questions About Piggyback Mortgages
What is a piggyback mortgage and how does it work?
A piggyback mortgage involves taking two separate loans to purchase a home. The most common structure is an 80/10/10: an 80% first mortgage, a 10% second mortgage, and a 10% down payment. By keeping the first mortgage at 80% Loan-to-Value (LTV), you can avoid paying Private Mortgage Insurance (PMI) on it.
What's the difference between 80/10/10 and 80/15/5 piggyback loans?
The 80/10/10 structure has an 80% first mortgage, 10% second mortgage, and 10% down payment. The 80/15/5 structure has an 80% first mortgage, 15% second mortgage, and 5% down payment. The 80/15/5 requires a smaller down payment but a larger second mortgage, which typically carries a higher interest rate.
Is a piggyback loan always cheaper than paying PMI?
Not always. It depends on the rates. Second mortgages often have higher interest rates than first mortgages. The calculator compares the total cost of both scenarios over time, helping you determine if the piggyback structure will save you money based on your specific numbers.
What credit score do I need for a piggyback mortgage?
Piggyback loans typically require a stronger credit profile than standard loans. Most lenders look for credit scores of 680 or higher to qualify for an 80/10/10 or 80/15/5 structure. Some may require 700+ for the best rates.
Can I use a HELOC as my second mortgage in a piggyback structure?
Yes, the second mortgage in a piggyback structure can be a fixed-rate loan or a Home Equity Line of Credit (HELOC). A HELOC often has a variable interest rate, which means your payment could change over time. This calculator allows you to select 'Interest Only' for the second mortgage to model a HELOC scenario.
How does combined LTV affect my piggyback loan approval?
Lenders look at the combined LTV (CLTV) of both mortgages. Keeping this ratio in a healthy range is key to getting approved and managing your overall risk. Most piggyback structures target a CLTV of 90-95% (80% first + 10-15% second). A lower CLTV generally means better rates and easier approval.
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