| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2009/2010 | League Two (England) | 39 | — | 8 | 0 | — | — |
| 2010/2011 | League Two (England) | 33 | 2180 | 5 | 0 | 0.21 | — |
| 2011/2012 | Premiership | 22 | 1472 | 3 | 0 | 0.18 | — |
| 2012/2013 | Premiership | 38 | 2859 | 23 | 0 | 0.72 | — |
| 2013/2014 | Premiership | 38 | 3328 | 18 | 0 | 0.49 | — |
| 2014/2015 | Championship (England) | 9 | 258 | 0 | 0 | 0 | — |
| 2014/2015 | Premiership | 23 | 1929 | 10 | 0 | 0.47 | — |
| 2015/2016 | League One (England) | 1 | 12 | 0 | 0 | — | — |
| 2015/2016 | Premiership | 29 | 2359 | 12 | 3 | 0.57 | — |
| 2016/2017 | League One (England) | 26 | 1694 | 0 | 0 | 0 | — |
| 2016/2017 | Premiership | 15 | 1261 | 4 | 0 | 0.29 | — |
| 2017/2018 | Premiership | 22 | 1134 | 3 | 0 | 0.24 | — |
| 2017/2018 | League One (Scotland) | 5 | 209 | 0 | 0 | 0 | — |
| 2018/2019 | Championship (Scotland) | 24 | 1831 | 17 | 3 | 0.98 | — |
| 2019/2020 | Premiership | 27 | 1927 | 7 | 5 | 0.56 | 6.99 |
| 2020/2021 | Premiership | 28 | 1292 | 5 | 1 | 0.42 | 6.98 |
| 2021/2022 | Championship (Scotland) | 32 | 2302 | 9 | 3 | 0.47 | — |
| 2022/2023 | Championship (Scotland) | 34 | 2746 | 14 | 6 | 0.66 | — |
| 2023/2024 | Championship (Scotland) | 36 | 2673 | 8 | 4 | 0.4 | — |
| 2024/2025 | League One (Scotland) | 36 | 2959 | 6 | 4 | 0.3 | — |
| 2025/2026 | League One (Scotland) | 25 | 1123 | 6 | 1 | 0.56 | — |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Classification resolved by league id against the canonical leagues index. G+A/90 computed from minutes actually played.
Figures computed from the GioScore season-stats database · as of 2026-07-24
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Kilmarnock | 31 | 15 | 9 | 7 | 14 | 0 | 1 | 0 |
 Partick Thistle | 31 | 10 | 11 | 10 | 7 | 0 | 1 | 0 |
 Hamilton Academical | 29 | 12 | 4 | 13 | 10 | 1 | 3 | 1 |
 St. Johnstone | 29 | 6 | 12 | 11 | 6 | 0 | 0 | 0 |
 Motherwell | 25 | 9 | 1 | 15 | 5 | 0 | 0 | 0 |
 Celtic | 23 | 3 | 1 | 19 | 1 | 0 | 0 | 0 |
 Aberdeen | 23 | 7 | 2 | 14 | 8 | 0 | 1 | 0 |
 Dundee United | 22 | 5 | 6 | 11 | 9 | 1 | 1 | 0 |
 Arbroath | 20 | 8 | 5 | 7 | 6 | 2 | 1 | 0 |
 Hibernian | 19 | 7 | 6 | 6 | 6 | 0 | 0 | 0 |
 St. Mirren | 18 | 7 | 6 | 5 | 4 | 0 | 0 | 0 |
 Ayr United | 17 | 8 | 4 | 5 | 8 | 0 | 0 | 0 |
 Dundee | 17 | 6 | 5 | 6 | 11 | 0 | 2 | 0 |
 Hearts | 16 | 4 | 9 | 3 | 6 | 0 | 0 | 0 |
 Raith Rovers | 15 | 6 | 4 | 5 | 4 | 1 | 0 | 0 |
 Greenock Morton | 15 | 7 | 2 | 6 | 7 | 2 | 2 | 0 |
 Ross County | 14 | 7 | 3 | 4 | 6 | 0 | 1 | 0 |
 Queen of the South | 14 | 5 | 5 | 4 | 4 | 1 | 2 | 0 |
 Dunfermline Athletic | 13 | 4 | 8 | 1 | 3 | 0 | 0 | 0 |
 Cove Rangers | 12 | 7 | 3 | 2 | 4 | 0 | 0 | 0 |
Billy McKay's 2025/2026 League One (Scotland) season produced 6 goals and 1 assist across 25 appearances (1,123 minutes) — 0.56 goal involvements per 90.
At his best he averaged 6.99 in 2019/2020, Premiership; at his worst, 6.98 in 2020/2021.
