Building credit from scratch takes 12-24 months of consistent on-time payment history. Here's the highest-leverage starter strategy.
Typically 6-12 months to generate a FICO score (which requires 6 months of credit history). 12-24 months to reach a meaningful 650+ score. The single highest-leverage move is perfect on-time payment behavior — even one 30-day late payment can drop a thin-credit FICO by 60-100 points.
Both, ideally, in sequence. Start with a secured card for revolving-credit history (faster impact, typically 2-3 months). Add a credit-builder loan 6 months later for installment-credit history (rounds out your credit mix). Holding both for 12-18 months gives you a much stronger credit profile than either alone.
Yes if available — being added to an established account (with long history + low utilization + perfect payments) can instantly boost a thin-credit FICO by 50-100 points. Confirm the issuer reports authorized users to bureaus (most major issuers do). Best for young adults with parents willing to add them.