Buffalo Bills records

Best seasons

Highest regular-season win percentage

1. 1964 12–2
2. 1990 13–3
3. 1991 13–3
4. 2020 13–3
5. 2022 13–3

Worst seasons

Lowest regular-season win percentage

1. 1971 1–13
2. 1968 1–12–1
3. 1984 2–14
4. 1985 2–14
5. 1976 2–12

Best starts

Wins to open a season

1. 9 to start 1964
2. 5 to start 1980
3. 5 to start 1991
4. 4 to start 1965
5. 4 to start 1975

Worst starts

Losses to open a season

1. 11 to start 1984
2. 10 to start 1971
3. 8 to start 2010
4. 6 to start 1985
5. 5 to start 1962

Undefeated seasons

Regular seasons finished undefeated

None on record.

Losing streaks

Consecutive losses

1. 15 1970–1971
2. 14 1976–1977
3. 13 1983–1984
4. 10 1968–1969
5. 8 1984–1985

Biggest wins

Largest margins of victory

1. 51–3 Los Angeles Raiders 1990
2. 42–0 Cleveland Browns 1990
3. 40–0 Houston Texans 2021
4. 38–0 Indianapolis Colts 1992
5. 47–10 Jacksonville Jaguars 2024

Worst losses

Largest margins of defeat

1. 10–56 New England Patriots 2007
2. 3–47 Baltimore Ravens 2018
3. 0–43 Baltimore Colts 1971
4. 6–48 Oakland Raiders 1968
5. 3–45 San Francisco 49ers 2012

Postseason

Seasons that reached the playoffs

1. 2025 1–1
2. 2024 2–1
3. 2023 1–1
4. 2022 1–1
5. 2021 1–1
6. 2020 2–1
7. 2019 0–1
8. 2017 0–1

Championship games

Seasons that reached the final

1. 1993 lost Super Bowl
2. 1992 lost Super Bowl
3. 1991 lost Super Bowl
4. 1990 lost Super Bowl
5. 1966 lost AFL Championship
6. 1965 won AFL Championship
7. 1964 won AFL Championship

Ties

Games that ended level

1. 21–21 Detroit Lions 1972
2. 17–17 Baltimore Colts 1970
3. 14–14 Miami Dolphins 1968
4. 17–17 San Diego Chargers 1966
5. 20–20 San Diego Chargers 1965
6. 27–27 Kansas City Chiefs 1963
7. 28–28 Boston Patriots 1962
8. 38–38 Denver Broncos 1960