The York-Antwerp Rules 1974 and 1994 provided for interest on general average allowances at the fixed rate of 7% per annum. With the York-Antwerp Rules 2016 this was changed to a flexible, market-oriented rate. As per Rule XXI this is set, for each calendar year, on the first banking day in January. Initially the rate was LIBOR plus 4% which, for adjustments in US Dollars, resulted in the following rates:
General Average Interest Rates under the York-Antwerp Rules 2016
| LIBOR | Applicable rate % | ||
| 04.01.16 | 1.16925 | +4% | 5.16925 |
| 03.01.17 | 1.68900 | +4% | 5.689 |
| 02.01.18 | 2.10933 | +4% | 6.10933 |
| 02.01.19 | 3.00200 | +4% | 7.002 |
| 02.01.20 | 1.99488 | +4% | 5.99488 |
| 04.01.21 | 0.34063 | +4% | 4.34063 |
| 04.01.22 | 0.60300 | +4% | 4.603 |
| 03.01.23 | 5.44686 | +4% | 9.44686 |
Note: Depending on the circumstances, timings and wordings of the contracts incorporating the York-Antwerp Rules 2016 it may be unclear which interest method is to apply for the year 2023. It is important to note that the practical difference is marginal, as for that year LIBOR + 4% was quasi equal to Prime + 2%. In 2022, a technical alteration became necessary as the LIBOR was discontinued. Since then, Rule XXI refers to the USD Prime Rate to which 2% are to be added. CMI has amended Rule XXI by applying 2% instead of the 4% mentioned in Rule XXI of the 2016 YAR.
As from 2024, for cases under the York-Antwerp Rules 2016 the rates for each year are:
| 01.01.24 | 8.50 | +2% | 10.50% |
| 01.01.25 | 7.50 | +2% | 9.50% |
| 01.01.26 | 6.75 | +2% | 8.75% |