Every mainstream scoring model is built from the same raw material: the accounts and payment records in your credit reports. The recipes differ, but the ingredients are similar. Here they are, biggest lever first — with a note that the exact weights are model-specific.

1. Payment history

Whether you pay at least the minimum, on time, on every account. This is typically the largest factor, and the damage is asymmetric: years of on-time payments build slowly, while a payment reported 30+ days late can set you back and linger for years.

The action: use reminders and, if suitable, minimum-payment autopay as a backup. Check the linked account has funds and that each payment processes; automation can fail or create overdraft costs.

2. Amounts owed, including utilization

This category includes revolving utilization, balances across account types and progress paying down installment loans. For cards, compare both each card's balance-to-limit ratio and the combined ratio. Reported balances may differ from today's app balance. Many models emphasize recent reported balances; FICO 10T also uses trended data, so utilization is not universally memoryless.

A common guideline is to keep reported balances below roughly a third of your limits; lower tends to read better. There is no fixed percentage where a score suddenly changes.

The action: pay before the statement closes when you can, or ask for a higher limit and do not spend into it.

3. Length of history

The age of your oldest account, the average age of all accounts, and how long since accounts were used. This moves slowly, and you cannot rush it.

The action: review the costs and risks before closing or keeping an old card. FICO explains that both open and closed accounts can count toward history while reported. Losing the available limit can affect utilization sooner. Do not pay unnecessary fees or keep a spending problem just to preserve an account.

4. New credit

Recent applications (hard inquiries) and newly opened accounts. A single application usually has a small, temporary effect; a cluster can read as risk. Rate-shopping for a single auto loan or mortgage within a short window is often treated as one event — but the window depends on the scoring model, so do not stretch it.

The action: space out discretionary applications and skip impulse store cards at checkout.

5. Credit mix

Whether you have handled different account types, such as cards and installment loans. It is a smaller FICO category, alongside new credit; it is not a reason to add debt you do not need.

The action: none required. Do not borrow money just to diversify.

Reading the ranking

FICO's general education groups payment history at 35%, amounts owed at 30%, length at 15%, new credit at 10% and mix at 10%. Those are broad category weights, not a formula for a particular person's points, and other models differ. The source explanation is useful for priorities, not a prediction calculator.

For an original illustration, $900 reported against a $1,000 limit is 90% on that card. With another empty $4,000-limit card, combined utilization is 18%. Both views can matter; the combined figure does not erase the nearly full card. Paying interest is not required to establish credit history. Keep bills affordable before shifting cash solely to optimize a score snapshot.

Costs and limitations

  • Model variance: the ranking is directional, not a promise of point changes.
  • Reporting lag: changes can take a cycle to appear.
  • Accurate history: errors can be disputed; accurate negatives generally cannot be removed early.

Your checklist

  • Turn on autopay minimums everywhere.
  • Keep reported balances low.
  • Weigh fees, temptation and available credit when reviewing old accounts.
  • Space out new applications.
  • Check your reports for errors at least annually.
  • Track the trend, not a single score reading.

Where to go next

Sources and further reading

Sources checked for this editorial review on September 25, 2026. Examples are illustrative calculations, not provider quotes.