FIFA 18 Winter Upgrades & Downgrades, also known as FIFA 18 Ratings Refresh, are released in February to replicate in the game what is happening in the real fields, updating the stats of the best players of the season.
You can check the potential list of upgraded players and understand the boost and how the FUT market behaves.
The FIFA 18 Ratings Refresh affects more than 400 ratings. The gold cards are usually improved in 1 or 2 points, which is explained by the fact that they are only assigned to players who had a marked development and not to minor adjustments. Silver and bronze players are usually upgraded by at least 4 points, while in exceptional cases this upgrade can sometimes reach 15 points. Usually, the higher is the original rating, the lower is the boost.
Based on what happened last year, these are the official rules we expect to see this year:
Upgrades AND downgrades apply to new non-inform players found in packs. Non-IF players in your Club will not receive an upgrade or a downgrade.
If an upgraded player’s new OVR rating equals or surpasses his existing first in-form’s rating, his IFs will get an upgrade.
2.1. An exception is made for lower rated players with significant upgrades.
2.2. Does not apply to Ultimate Scream items.
If an upgraded player’s new OVR rating does not equal or surpass his existing in-form’s rating, his IFs will not get an upgrade.
3.1. However, if an upgraded player with an existing IF gets upgraded across Quality tiers (eg. Silver to Gold), his lower-quality IF will not get an upgrade. This preserves the in-form’s high value.
3.2. There is also an extra rule that wasn’t officially announced but that EA is using, about the IF upgrades:
Example: If a NIF card is upgraded to 77, his IF card may be updated to 82
Winter Upgrades Release Date