Credit Score Simulator — How It Works and How to Increase Your Score
Understand how the credit score (Serasa, SPC, Boa Vista) is calculated, simulate your score based on the 5 main factors and receive personalized tips to improve your score and obtain better credit conditions.
What is the purpose?
The credit score is a score (generally from 0 to 1000) that banks, financial institutions and retailers use to assess a consumer's risk of default. The higher the score, the better the credit conditions offered (lower interest rates, higher limits, faster approval). This educational simulator helps you understand what factors make up your score and how to improve it.
Formula Used
The score is calculated by credit bureaus (Serasa, SPC/CNDL, Boa Vista) using proprietary machine learning models. The most determining factors, based on FICO Score models (widely adopted worldwide), are:
- Payment history (35%): Payments on time × delays and defaults
- Credit usage (30%): Balance used ÷ Total available limit
- History time (15%): Average age of credit accounts
- New inquiries (10%): Number of credit requests in the last 12 months
- Credit mix (10%): Diversity of credit types (card, financing, payroll)
How to interpret the result?
Serasa score ranges (1-1000):
- 0-300: Very Low Score (High Risk) — credit generally denied
- 301-500: Low Score (Considerable Risk) — very restrictive conditions
- 501-700: Regular Score (Moderate Risk) — approval with high interest rates
- 701-800: Good Score (Low Risk) — better credit conditions
- 801-1000: Excellent Score (Very Low Risk) — best rates and limits
A score above 700 is generally sufficient for approval in most financial products with reasonable conditions.
Practical Examples
- Beginner Profile (no history): No bank account or card for over 1 year. Estimated score: 300-450. Action: open an account and request a card with a small limit to build history.
- Average Profile (regular use): Pays bills on time, uses 40% of the card limit. Estimated score: 600-700. Action: reduce card usage to below 30% and maintain a long history.
- High Profile (excellent management): Never delayed, uses less than 10% of the limit, has 8+ years of history. Estimated score: 850-1000.
Usage Tips
- Pay all bills before they are due. A single delay can reduce your score by 50-100 points and take months to recover.
- Keep credit card usage below 30% of the available limit. Using 90% of the limit, even if you pay everything, sends a negative signal.
- Do not cancel old unused cards — they contribute positively to the average length of your credit history.
- Limit credit requests ('hard inquiry' analyses) to a maximum of 2-3 per year.
- Register with the Positive Registry (Law 12,414/2011) — the history of regular payments significantly improves the score.
Important Observations
This simulator is educational and uses an estimate based on publicly known factors that influence the credit score. Each bureau (Serasa, SPC/CNDL, Boa Vista, Quod) uses its own proprietary model and scores may differ between platforms. To check your real score, access the official Serasa websites (serasa.com.br) or SPC Brasil for free.
Frequently Asked Questions (FAQ)
What is a credit score and how does it work?
Credit score is a score assigned to each CPF by credit bureaus (Serasa, SPC, Boa Vista) that reflects the statistical probability of a person paying their debts on time in the next 12 months. It is calculated based on historical data on financial behavior: payments, debts, credit history and inquiries. The higher the score (maximum 1000), the lower the risk perceived by the creditor.
How can I check my credit score for free?
You can consult for free on the Serasa website (serasa.com.br/score) or the Serasa app. Other free options: SPC Brasil (spcbrasil.org.br), Boa Vista Consumidor (consumidor.boavistascpc.com.br), and through the gov.br application for the Positive Registry. Each platform can show a different score, as each bureau uses its own calculation model.
How long does it take to improve your credit score?
It depends on the current situation. If you have negative debts (dirty name), clearing your name is the first step — after removing the negative debt, your score starts to rise, but it may take 3-6 months for a significant improvement. To go from an average score (500-600) to good (700+) with good financial behavior, the process normally takes 6-12 months. Achieving an excellent score (900+) requires years of impeccable track record.
Does checking your own CPF on Serasa harm your score?
No. Checking your own CPF or score at Serasa, SPC or any bureau is a 'soft inquiry' and does not affect your score. Only inquiries made by companies when analyzing your credit application ('hard inquiry') can negatively impact the score, especially if many are made in a short period.
What is Positive Registration and how does it affect the score?
The Positive Registry (Law 12,414/2011) is a database that records the history of regular payments (not just debts and defaults). With the Positive Registry, Serasa and other bureaus are able to positively evaluate those who pay water, electricity, internet, card and financing bills on time — even if they have never taken out formal credit. Those who have a good payment history in the Positive Registry tend to have a higher score.
Does a dirty name affect the score? How long?
Yes, drastically. A negative debt (name on Serasa/SPC) can drop your score by 200-400 points immediately. After payment or settlement of the debt, the creditor has up to 5 business days to request the removal of the name. Default information may appear in the bank for up to 5 years (maximum legal period), even if the debt is paid. After removal, score recovery is gradual.
Does a high score guarantee credit approval?
Not necessarily. The score is an important factor, but not the only one. Each financial institution has its own credit analysis criteria, which may include: verifiable income, history of relationship with the bank, current debt in relation to income, type of product requested and even the amount of credit. A score of 800 does not guarantee approval for a $1 million real estate loan for someone without verifiable income.
Why is my score different on Serasa and SPC?
Each bureau (Serasa, SPC/CNDL, Boa Vista, Quod) uses its own proprietary mathematical model and may have access to different data sets. Additionally, scoring scales vary: Serasa uses 0-1000; SPC uses 0-1000; Boa Vista uses 0-1000. A company checking your credit may use any one of these bureaus or a combination of them, so the result may vary.