Credit Age Impact Calculator
Calculate Your Average Credit Account Age
Enter the ages of your open credit accounts in years to calculate your average credit age and oldest account age. See how your credit history length compares to scoring thresholds and what it means for your credit score.
Why Credit History Length Matters to Your Score
The length of your credit history accounts for approximately 15% of your FICO credit score. This component evaluates three things: the age of your oldest account, the age of your newest account, and the average age of all your accounts. Longer credit history is generally better, because it gives lenders more data to assess how you have managed credit over time. A 20-year history of responsible borrowing is more compelling evidence of creditworthiness than a 2-year history, even if both are spotless.
Credit history length builds only with time; it cannot be manufactured or accelerated through financial manoeuvres. This makes it one of the few credit score components that patience directly improves. Young adults and recent immigrants are particularly affected by short credit histories, since they may have strong income and perfect payment records but thin credit files that result in moderate rather than excellent credit scores.
Average Age vs. Oldest Account Age
FICO scoring models consider both the average age of all accounts and the age of the oldest account. Having a very old account mixed in with several very new accounts produces a lower average age than having a smaller number of consistently older accounts. This is one reason why closing old credit card accounts, even unused ones, can damage your score: the closed account is eventually removed from your credit report, which can reduce both your oldest account age and your average account age significantly.
Financial advisers generally recommend keeping old accounts open, even if they are used only for an occasional small purchase to keep them active. Many issuers close accounts that are completely inactive for 12 to 24 months, so a small recurring charge such as a streaming subscription on an old card keeps it open and continues to build age passively.
The Impact of Opening New Accounts
Every time you open a new credit account, it enters your credit file at an age of zero and immediately drags down your average account age. If you have three accounts with an average age of 7 years and open a fourth, the new account is 0 years old and the average drops to around 5.25 years. The older your existing accounts, the greater the proportional drop from adding a new one.
This does not mean you should never open new accounts. New accounts are often financially necessary, and the credit mix and credit limit benefits can outweigh the short-term age reduction. However, being strategic about timing is helpful: applying for several new accounts in a short period compounds the average age reduction and triggers multiple hard inquiries simultaneously, creating the worst-case scenario for the credit age and new credit components of your score. Spacing applications at least six to twelve months apart mitigates these effects.
