Dear Liz: I am trying to purchase my first home. I have a 20% down payment for the price range that I am looking for. The issue I am running into is that I have relatively new credit and my credit score is not great at all. I had to go to the emergency room two years back with no insurance and have medical expenses that went into collections. I am now in a financial spot to pay them off. These are the only negatives on my credit report that are unresolved. Will paying these off get my credit to the point that I can buy a home? I am lost as to how to get my score where it needs to be.

Answer: Unfortunately, paying collection accounts typically doesn’t help your credit scores, especially the scores used by most mortgage lenders.

Since you’re new to credit, you may not realize that you don’t have just one credit score. You have many. The two major types are FICO and VantageScore. The latest versions of each (FICO 9 and VantageScore 3.0 and 4.0), ignore paid collections. In addition, FICO 9 and VantageScore 4.0 count unpaid medical collections less heavily against you than other unpaid debts.

But mortgage lenders typically use much older versions of the FICO score, which count all collections against you even if they’re paid.

That said, it would be tough to get a mortgage with unpaid collections on your credit report. Since you have the cash, you may be able to negotiate discounts so that you can resolve these debts at a somewhat lower cost. (Collectors typically would much rather get a lump-sum settlement than wait to be paid over time.)

You’ll also want to get some positive information reported to the credit bureaus to help offset the negative information. The fastest way to do that would be to persuade someone you know who has good credit to add you as an authorized user to one of his or her credit cards. This person doesn’t have to give you the card or any access to the account. Typically, the account history will be “imported” to your credit reports, which can help your scores as long as the person continues to use the card responsibly.

Another way to add positive information is with a credit-builder loan, offered by many credit unions and Self Lender, an online loan site. Usually, credit-builder loans put the money you borrow into a savings account or certificate of deposit that you can claim after you’ve made 12 on-time payments. This helps you build savings at the same time you’re building your credit.

Secured credit cards also can help. With a secured card, you make a deposit with the issuing bank of $200 or more. You get a credit limit that’s typically equal to that deposit. Making small charges on the account and paying it off in full every month can help you build credit without paying interest. You’ll want a card that reports to all three credit bureaus, because mortgage lenders typically pull FICO scores from all three bureaus and use the middle of the three scores to determine your rate and terms.