Below is the complete tier breakdown of mainstream 0% APR credit cards by intro period length. Intro periods are taken from the issuers' own pages and card agreements where those publish a figure, and flagged where they do not; either way, confirm current terms on the issuer site before applying. The ordering reflects editorial judgement, not affiliate ranking.
Tiers of 0% APR runway
Tier 1: ~21 months
Tier 2: ~18 months
Tier 3: ~15 months
| Tier | Example cards | Score required | Sample payoff ($8K) |
|---|---|---|---|
| ~21 months | Reflect Card, BankAmericard (21 billing cycles), Citi Simplicity, Discover It (BT) | Around 700+ | $381 to clear $8,000 |
| ~18 months | Citi Double Cash (BT), Discover It (BT) | Around 670+ | $445 to clear $8,000 |
| ~15 months | Freedom Flex, Blue Cash Everyday | Around 670 to 700 | $534 to clear $8,000 |
Required monthly payment by balance and tier
Pick your balance and read across to the tier you qualify for. Numbers assume a single charge cleared evenly over the full intro period, with no other balances on the card.
| Balance | @ 15 months | @ 18 months | @ 21 months |
|---|---|---|---|
| $3,000 | $200 | $167 | $143 |
| $5,000 | $334 | $278 | $239 |
| $8,000 | $534 | $445 | $381 |
| $10,000 | $667 | $556 | $477 |
| $15,000 | $1,000 | $834 | $715 |
Why a longer runway is not always better
Rewards versus runway
The longest-runway cards (around 21 months) typically have no rewards. A 15 month runway card with 1.5 to 2 percent cashback can return $300 to $600 on a $20,000 wedding spend you can clear in 14 months. Run our calculator to compare the rewards earned against the interest cost of clearing the same balance over a longer window.
Credit score gating
Tier 1 cards (around 21 months) generally need FICO 700 or above. If you are sitting at 680, you can probably get an 18 month card today; waiting six months to push your score above 700 might unlock a 21 month card later.
Penalty APR
Some long-runway cards reserve the right to revoke the 0% promo on a single missed payment. Others (the Simplicity is the canonical example) have no penalty APR. If you are worried about life getting in the way, prioritise a card with no penalty APR over one with a slightly longer runway.