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Intangible Assets | 12 Months Ended
--- | ---
Jan. 31, 2022
Notes to Financial Statements |
Intangible Assets | Note 9 - Intangible Assets ​
​ | ​ | ​ | ​ | ​
​ |  | January 31, |  | January 31,
​ | ​ | 2022 | ​ | 2021
Cost |  |  |  |
Customer agreements and relationships |  | 251,402 |  | 240,479
Existing technology |  | 326,411 |  | 295,161
Trade names |  | 9,038 |  | 8,844
Non-compete covenants |  | 12,306 |  | 10,939
​ |  | 599,157 |  | 555,423
Accumulated amortization |  |  |  |
Customer agreements and relationships |  | 135,380 |  | 119,361
Existing technology |  | 218,953 |  | 183,539
Trade names |  | 6,677 |  | 5,996
Non-compete covenants |  | 8,538 |  | 6,535
​ |  | 369,548 |  | 315,431
Net |  | 229,609 |  | 239,992
​ Intangible assets related to our acquisitions are recorded at their fair value at the acquisition date. The change in intangible assets during the year ended January 31, 2022 is primarily due to the acquisitions of QuestaWeb, Portrix and GreenMile, partially offset by amortization. The balance of the change in intangible assets is due to foreign currency translation. Intangible assets with a finite life are amortized into income over their useful lives. Amortization expense for existing intangible assets is expected to be $229.6 million over the following periods: $53.4 million for 2023, $41.2 million for 2024, $38.4 million for 2025, $34.1 million for 2026, $19.3 million for 2027 and $43.2 million thereafter. Expected future amortization expense is subject to fluctuations in foreign exchange rates and assumes no future adjustments to acquired intangible assets.

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