Piggyback Loan
Also known as: 80-10-10 loan, combo loan, second mortgage
A second loan taken simultaneously with a primary mortgage to avoid PMI or cover part of the down payment. The most common structure is an 80-10-10: 80% first mortgage, 10% second mortgage (often a HELOC), and 10% down payment. Not directly a personal loan product, but sometimes confused with one.
Full definition
A piggyback loan involves two mortgage loans originated simultaneously: a primary first mortgage (usually 80% of the purchase price) and a second mortgage (10%-20% of the purchase price). This combination avoids private mortgage insurance (PMI), which is required when a borrower puts less than 20% down on a conventional mortgage. Common piggyback structures: 80-10-10: 80% first mortgage, 10% second mortgage (often a HELOC or home equity loan), 10% buyer down payment. Total LTV = 90%, but the primary mortgage is at 80% so no PMI. 80-15-5: 80% first mortgage, 15% second, 5% down. Less common now but historically popular. Why borrowers use piggybacks: PMI on a conventional loan costs 0.5%-1.5% of the loan amount annually (for example, $1,000-$3,000/year on a $200,000 loan). A second mortgage at 7%-10% APR may be less expensive annually than PMI, especially if the second mortgage has a shorter term or can be paid off faster. How it relates to personal loans: Piggyback loans are mortgage products, not personal loans. However, borrowers sometimes confuse the two when considering home purchase financing options. A personal loan cannot be used as a down payment in most cases: conventional mortgages require that the down payment come from the borrower's own funds (not borrowed), and lenders verify the source of down payment funds. Using a personal loan as a down payment typically violates loan terms and is discoverable through credit report and bank statement review. Current availability: Piggyback loans are less common post-2008 than they were in the early 2000s, but they are available from portfolio lenders, credit unions, and some banks for qualified borrowers.
- Written by
- Get Advance Loan Editorial Team
- Reviewed by
- Compliance Review
- Published
- January 15, 2026
- Last reviewed
- June 15, 2026
- APR (Annual Percentage Rate)APR is the yearly cost of borrowing, expressed as a percentage of the loan amount. It includes interest plus most lender fees, so it's a more complete measure of cost than the interest rate alone.
- Interest rateThe interest rate is the percentage of the loan balance charged per year as interest, excluding fees. It is a component of, but smaller than, the APR.
- Fixed interest rateA fixed rate stays the same for the entire life of the loan, so the monthly payment never changes. Most U.S. personal loans are fixed-rate.
- Variable interest rateA variable rate can change over the life of the loan, usually tied to an index like the prime rate. Monthly payment can rise or fall.
- Prime rateThe prime rate is the benchmark interest rate U.S. banks publish for their most creditworthy commercial customers. Many consumer rates are quoted as prime + a margin.
- Loan termThe loan term is how long you have to repay the loan, usually expressed in months. Common personal-loan terms are 24, 36, 48, 60, and 72 months.
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