In a bid to do more business with homebuyers, Rocket Mortgage is rolling out a new loan that lets low- and moderate-income borrowers buy houses with as little as 1 percent down — without having to pay extra for mortgage insurance.

Announced Monday, Rocket Mortgage’s ONE+ mortgage is a conventional loan, meaning it meets requirements set by Fannie Mae or Freddie Mac. The mortgage giants already offer programs that let borrowers put down as little as 3 percent — like Fannie Mae’s HomeReady mortgage and Freddie Mac’s Home Possible loan — but private mortgage insurance is required on loans with down payments of less than 20 percent.

Rocket’s ONE+ mortgage provides a 2 percent lender-funded grant so that buyers only need to come up with a 1 percent down payment. Rocket sweetens the deal by also picking up the cost of private mortgage insurance (PMI).

That means qualifying buyers can purchase a $250,000 home with a $2,500 down payment and save up to $245 a month on private mortgage insurance, paying just $1,454 a month in principal and interest on a hypothetical 30-year fixed-rate loan at 6 percent interest.

Since it generally takes 7 years to build up the 20 percent equity needed to get out of private mortgage insurance, that hypothetical borrower would save $20,500 over that period, Rocket calculates.

To qualify for the ONE+ mortgage, which is tied to affordable housing goals, homebuyers can’t make more than 80 percent of the area median income (AMI) and need a FICO score of 620 or better. The loan is only available to buyers putting down less than 5 percent — a maximum of 2.99 percent from their own pockets, plus Rocket’s 2 percent grant.

In April, Rocket announced it would offer homebuyers a closing credit of up to $10,000 if they work with a real estate agent that’s partnered with sister company Rocket Homes.

The BUY+ program provides homebuyers working with Rocket Homes Partner Agents a closing cost credit equal to 1.5 percent of their loan amount — about $5,000 for a homebuyer putting down 5 percent to purchase a $350,000 home. To claim the maximum $10,000 closing credit, a homebuyer would have to borrow close to $667,000.

Sellers who work with Rocket Homes Partner Agents can qualify for a “SELL+” rebate equal to 1 percent of their home’s sale price and are also eligible to participate in BUY+ if they also buy with Rocket Homes and Rocket Mortgage.