Credit mix: how much it counts and when to leave it alone

A common piece of advice goes like this: your score is stuck because you only have credit cards, so take out a small personal loan, pay it off, and watch your “credit mix” improve. People act on it every year, usually right before a big application.

FICO’s own education site answers that idea directly. Credit mix does count, but only a little, and buying it with a new loan usually costs more than it returns.

What credit mix actually measures

Credit mix is the variety of account types on your report. FICO says it considers credit cards, retail accounts, installment loans, finance company accounts and mortgage loans. It makes up 10% of a FICO Score for the general population.

FICO adds two qualifiers worth taking seriously:

• “It’s not necessary to have one of each.” There’s no checklist you’re being graded against.
• FICO looks at the payment history on each type as well as whether the type exists. A wide mix of accounts with late payments on them doesn’t help you. Payment history is 35% of the score.

FICO also says credit mix “most likely won’t determine whether or not you obtain credit from lenders.” Its suggestion is that mix can play a part when you’re trying to push an already good score toward the top of the range.

Revolving and installment, sorted

Almost every account falls into one of two buckets. Revolving accounts let you borrow, repay and borrow again up to a limit. Installment accounts lend a fixed amount that you repay on a schedule.

If you already have a car loan or student loans plus a card or two, your mix is covered. Those accounts count while they’re open, and they stay on your report as closed accounts after they’re paid off.

Running the numbers on a loan “for mix”

Put a price on the common advice. Example: you have three credit cards, opened 6, 4 and 2 years ago, all paid on time with low balances. You take a $1,000 personal loan at 20% APR for 12 months to add an installment account.

The interest. A $1,000 loan at 20% APR over 12 months has a payment of about $92.63. Twelve payments total about $1,111.61, so you pay roughly $112 in interest, before any origination fee the lender charges.

The average age. Your three cards average (6 + 4 + 2) ÷ 3 = 4 years. Add a brand-new loan and the average becomes (6 + 4 + 2 + 0) ÷ 4 = 3 years. FICO says it looks at the age of your newest account and the average age of all accounts as part of length of credit history, which is 15% of the score.

The new credit. The application usually means a hard inquiry, and new accounts fall under the 10% “new credit” category. FICO says opening several accounts in a short time represents greater risk, especially when your history is short.

So you’d pay about $112 to improve a 10% category while taking small hits in the 15% and 10% categories. FICO doesn’t publish point values, so nobody can tell you how that nets out on your file. FICO’s own guidance on this exact trade is that for a small loan taken only to diversify, the answer is “probably not.”

When mix is worth thinking about

Mix is reasonable to factor in when:

• You’re building from nothing anyway. If you need a first account, a credit builder loan alongside a secured card gives you both types from the start. The loan is doing double duty, building history and adding mix, so the cost isn’t spent only on mix.
• You need the loan for a real purpose. If you’re financing a car you were going to buy, you get the mix effect for free.
• Everything else is already excellent. If your payments are perfect, your utilization is low and your accounts are seasoned, mix is one of the few levers left. Even then, FICO frames it as risk versus reward.

Where it isn’t worth thinking about: if you have late payments, collections or high card balances. Those sit in the 35% and 30% categories, and fixing them moves far more than mix can. How a credit score is calculated lays out the full weighting.

The paid-off loan surprise

The other side of credit mix shows up when you finish paying a loan. Some people see their score dip a little when their last open installment loan closes, which feels backwards after years of on-time payments. The closed loan stays on your report with its full payment history, so the record of good behavior isn’t lost. Why paying off a loan can drop your score explains the mechanism and why the dip usually isn’t a reason to keep paying interest.

What to do with this

1. Look at your report and sort your accounts into revolving and installment. If you have at least one of each, open or closed, stop worrying about mix.
2. If you have only cards and no loans, check the bigger factors first: any late payments, and your card utilization.
3. Don’t open a loan solely for mix within a year of a mortgage or car application. The inquiry and the new account land right when lenders are looking.
4. If you’re starting from zero, consider pairing a secured card with a credit builder loan so you build both types at once.
5. When you do take an installment loan for a real reason, pay it on time. That history is what makes the mix count.