Your credit score is a 3-digit number that affects whether you can rent an apartment, get a mortgage, buy a car, sometimes even get a job. Yet most people don't really understand how it works or what to do about it. This guide explains everything in plain English.
A credit score is a numerical summary of your credit history, designed to predict how likely you are to repay borrowed money. Lenders use it to decide whether to approve you for credit cards, mortgages, auto loans, and sometimes even to set insurance rates or evaluate job applications.
There are two main scoring systems used in the US and Canada:
Both use the same 300-850 scale and the same general score ranges. The exact formulas differ slightly, but for the purposes of building credit, the strategies are nearly identical.
| Score Range | Rating | What It Means |
|---|---|---|
| 800-850 | Exceptional | Best rates, premium cards, easy approvals |
| 740-799 | Very Good | Approve for most credit, good rates |
| 670-739 | Good | Above average, approve for most things |
| 580-669 | Fair | Subprime — higher rates, harder approvals |
| 300-579 | Poor | Hard to get approved for new credit |
For a conventional mortgage, you typically need 620-740+. For FHA (government-backed), 580+ often works. For premium credit cards (Chase Sapphire, Amex Platinum), 720+ is the usual threshold. The difference between a 720 and an 800 score on a $400,000 mortgage is roughly **$80,000 over 30 years** in interest.
FICO's formula breaks down into 5 factors. Two of them — payment history and credit utilization — account for 65% of your score. Get those right and the rest is mostly automatic.
The single biggest factor. Have you paid your bills on time?
The percentage of your available credit that you're using. Calculated per card and overall.
Example: You have a $10,000 credit limit across all cards. If you have a $1,000 balance, your utilization is 10%. If you have a $5,000 balance, it's 50% — and your score will be roughly 50-100 points lower.
Critical insight: utilization has **no memory** — it only counts what your balance was on your last statement. If you pay off your card before the statement closes, you can have a $0 utilization and a 800+ score, even if you spent $5,000 that month. This is the easiest score factor to optimize.
How long you've had credit. Includes the age of your oldest account, newest account, and the average age of all accounts.
The variety of credit types you have. Lenders like to see you can manage different kinds of debt responsibly.
How many new accounts you've opened recently.
You have a legal right to free credit reports from each of the three major bureaus (Equifax, Experian, TransUnion) every week at AnnualCreditReport.com. This is the only site authorized by the US government.
For free scores, use:
For Canadians: Equifax Canada and TransUnion Canada provide free credit reports by mail. Borrowell and Mogo provide free monthly credit scores.
It depends on what's hurting you and what you do about it. Here's a realistic timeline:
| Action | Time to See Impact | Score Improvement |
|---|---|---|
| Pay down credit card balance | 1 statement cycle (30 days) | 20-50 points |
| Set up autopay for minimums | 3-6 months of perfect payments | 30-60 points |
| Dispute inaccurate items on report | 30-60 days | 20-100 points per item |
| Pay off a collection account | 30-90 days | 20-50 points |
| Become an authorized user on a friend's card | 1-2 statement cycles | 10-30 points |
| Open a new credit card (0% utilization) | 3-6 months | 10-20 points long-term |
| Build credit from scratch | 12-24 months | 0 → 700+ |
False. Checking your own score is a "soft inquiry" and has zero impact. Only applications for new credit create "hard inquiries" (5-10 points, fall off in 2 years). Check your score as often as you want.
False. Closing old cards hurts your score in two ways: reduces total available credit (raises utilization), and lowers average age of accounts. The only reason to close a card is annual fees you can't justify, or you can't trust yourself not to overspend.
False. This is one of the most persistent myths. Carrying a balance does NOT help your score. It just costs you 20-30% interest annually. Pay your balance in full each month. Your score still goes up because the credit card company reports your on-time payment to the bureaus.
False. Your income is not in your credit score. A high earner with maxed-out cards has a worse score than a low earner with low utilization. Lenders consider income separately when deciding to approve you, but it's not in the score itself.
False. Most negative items (late payments, collections, charge-offs) fall off your report after 7 years. Bankruptcies fall off after 7-10 years. The older they get, the less they impact your score. A late payment from 6 years ago is barely relevant.
False. Debit cards don't show up on your credit report because they're not credit — you're spending your own money. To build credit, you need a credit card, loan, or line of credit that gets reported to the bureaus.
False. There are dozens of credit scores. FICO has multiple versions (FICO 8, FICO 9, FICO Auto, FICO Bankcard, etc.). Lenders use different versions for different purposes. Your free Credit Karma score may differ from what your mortgage lender sees. This is normal and expected.
Different lenders have different thresholds and use different scoring models. The same 720 score might get you:
This is why "rate shopping" within a 14-45 day window for the same type of loan is important. Multiple applications count as one inquiry, so you can check with 5 mortgage lenders without 5 separate hard pulls.
If you need a quick boost for a specific purpose (mortgage application, car loan), here's the highest-impact 30-day plan:
This sequence alone can boost your score 20-80 points in 30 days. The exact gain depends on how high your utilization was to start.
Credit repair companies can be helpful if:
Be wary of companies that promise specific results or charge upfront fees (illegal in many states). Legitimate credit repair companies include Lexington Law and CreditRepair.com. Most charge $50-150/month. You can do everything they do yourself for free — they just save you time.
A non-profit credit counselor (find one at the National Foundation for Credit Counseling) is often a better first step. They can help with budgeting, debt management plans, and free credit report reviews.
FICO 670+ is good, 740+ is very good, 800+ is exceptional. VantageScore uses the same ranges. The minimum needed for a mortgage is usually 620 (FHA) or 740 (conventional). For premium credit cards: 720+.
The fastest realistic improvements: 30 days for utilization (paying down cards). 3-6 months for new credit history. 6-12 months for serious negative items (late payments, collections) to age. A complete rebuild from scratch takes 12-24 months.
No. Checking your own score is a "soft inquiry" and doesn't affect your score at all. Only "hard inquiries" from credit applications (mortgage, auto loan, credit card) lower your score by 5-10 points and fall off after 2 years.
Payment history (35%) and credit utilization (30%) together account for 65% of your FICO score. Length of history (15%), credit mix (10%), and new credit (10%) matter less. Pay on time and keep utilization below 10% for the biggest gains.
No, generally don't close old cards. They help your average age of accounts (15% of score) and credit mix. Even if you don't use them, keep them open with a small recurring charge (like a streaming subscription). The exception: if the card has an annual fee you can't justify.
Use our free calculators to model your path to better finances:
Compound Interest Debt Payoff Should I Buy This? Am I Underpaid?⚠️ This article is for informational purposes only and does not constitute financial, credit, or legal advice. Credit scores and lending decisions involve complex factors. Always consult a qualified financial professional for personalized advice.