Bilans strat statków sprzymierzonych i niemieckich U-bootów w 1940 r:
| Miesiąc | Liczba straconych statków | Tonaż (BRT) | Liczba straconych U-bootów |
| I | 40 | 111.263 | 2 |
| II | 45 | 169.566 | 4 |
| III | 23 | 62.781 | 3 |
| IV | 7 | 32.467 | 5 |
| V | 13 | 55.580 | 1 |
| VI | 58 | 284.113 | 0 |
| VII | 38 | 195.825 | 1 |
| VIII | 56 | 267.618 | 2 |
| IX | 59 | 295.335 | 0 |
| X | 63 | 352.407 | 1 |
| XI | 32 | 146.613 | 2 |
| XII | 37 | 212.590 | 1 |
| Razem: | 471 | 2.186.158 | 23 |