A credit score is a three-digit number calculated from your borrowing history, and lenders use it to guess how likely you are to repay on time. The two main scoring models are FICO and VantageScore. The general-use FICO Score runs from 300 to 850, and higher is better.
What actually moves the number comes down to five factors: payment history, amounts owed, length of credit history, new credit, and credit mix. Payment history carries the most weight by a clear margin, so a pattern of on-time payments matters more than almost anything else you can do. For related coverage, see t54 signs three MOUs for AI agent finance: what the paperwork actually says.
Before the breakdown, one framing note. A score is a prediction tool, not a moral report card. It rewards steady, boring behavior over time. That is good news, because it means the levers are known and mostly within your control.
What are the five factors, and how much does each one count?
According to Experian, FICO Scores are used by 90% of top lenders, and the model weights five categories. Payment history counts for 35%. Amounts owed counts for 30%. Length of credit history counts for 15%. New credit and credit mix each count for 10%.
Payment history is a record of how you have handled debt payments over time. On-time payments build a positive history. Late or missed payments, accounts sent to collections, foreclosure, and bankruptcy all damage it. Because this category is the largest, a single serious delinquency can outweigh many small good habits.
Amounts owed looks at how much you owe overall, and, importantly, what percentage of your available revolving credit you are using. Revolving credit mainly means credit cards, where you borrow up to a limit and repay flexibly. Using a small share of your available card credit generally looks better than running balances close to the limit.
Length of credit history measures how long you have been using credit. It considers the average age of your accounts, the age of your oldest account, and how recently you opened one. New credit counts recent hard inquiries and recently opened accounts. Credit mix considers whether you hold both revolving credit and installment credit, such as a car loan or mortgage, which is a lump sum repaid on a fixed schedule.
Does checking your own credit hurt your score?
No. Checking your own credit does not lower your scores. Experian states this directly in its guidance on FICO Scores. The inquiries that count against the new-credit category are hard inquiries, which happen when a lender checks your report as part of an application you submitted.
Think of it like a medical file, where you reading your own chart is different from a clinic requesting it. The analogy breaks down in one place: a hard inquiry leaves a visible mark on the file, while your own check does not affect the number at all.
What are the most common credit score myths?
Several persistent beliefs do not match how scoring actually works.
- "Checking my score hurts it." Self-checks do not. Only hard inquiries from credit applications count, and even those are a small 10% category.
- "Carrying a balance builds credit." What builds credit is on-time payment history. Carrying a balance usually just means interest charges, and it raises the utilization figure that makes up part of the amounts-owed category.
- "Closing old cards cleans up my file." Closing an old account can shorten your average account age and reduce your available credit, both of which feed the length and amounts-owed categories. Experian's guidance suggests keeping old accounts and applying for new credit only when necessary.
- "Income determines my score." Income is not one of the five scoring categories. The score is derived from data in your credit reports, not your paycheck.
Our analysis: most myth-driven advice optimizes the small categories while ignoring the big two. If your payment history is clean and your card utilization is modest, the remaining levers move the number slowly. This connects to our earlier piece, Currency exchange rates explained: who sets them and why they move.
How long does damage last, and what actually helps?
The scoring models reward time and consistency, so recovery is a timeline question rather than a trick question. Late payments, collections, foreclosure, and bankruptcy are recorded negative events in your payment history, and their effect fades as newer on-time payments accumulate. The precise recovery time varies by person and by how severe the event was, so beware of anyone quoting a single universal number.
What helps, per the documented weights: pay every account on time, keep revolving balances well below your limits, leave old accounts open, and apply for new credit sparingly. A varied mix of installment and revolving accounts can help, but taking on a loan purely to game the mix is a poor trade, because you pay interest for a 10% category.
One practical step worth doing regardless of score: read your actual credit reports. The three national consumer credit bureaus, Experian, TransUnion and Equifax, each maintain a report on you, and scores are calculated from the data in them. Errors in a report flow straight into the score, so the report is the thing to check.
Why does the score matter beyond loans?
Lenders are not the only ones who look. Experian notes that credit can come into play when you are obtaining insurance, renting an apartment, or even seeking a job, and that creditors and other businesses may request your credit report for applications of various kinds. A thin or damaged file can therefore cost you opportunities that have nothing to do with borrowing.
It is also worth keeping the number in proportion. A credit score describes borrowing behavior. It says nothing about your savings, your income stability, or whether a given loan is a good idea for you. Someone can have a strong score and still take on debt they cannot comfortably carry. The score measures reliability at repaying, not financial health as a whole.
What this means for you
The evidence supports a short priority list. First, protect payment history, because at 35% it is the single largest factor. Second, manage card utilization, because at 30% the amounts-owed category is nearly as large. Third, let time work: keep old accounts, avoid unnecessary applications, and let your average account age grow. Everything else, including credit mix, is fine-tuning.
What remains unknown is exactly how any specific score was calculated. The two main models, FICO and VantageScore, use different formulas on the same report data, and individuals typically have many different scores at once. So treat any single number as one reading of the same underlying file, and focus on the file itself: the payments, the balances, and the history you can verify.
