Customers who anchor at a budget requirement significantly below the uplift percentage have seen the best result in lowering uplift at renewal. Require that the uplift is removed and the pricing for the add-on is reduced. Base your argument on the budget constraints and historical rates.
Present competition as an alternative during negotiations to leverage pricing. Indicate that you're considering a competitor's offer, which provides similar functionalities for a lower price, as this can incentivize the current supplier to match or improve upon the offer.
Address overage fees in the renewal conversation or as part of a mid-purchase upgrade. Highlight how increased usage should not result in increased fees, and request waivers based on previous usage or planned growth.
Emphasize strict budget constraints and the need to reduce costs due to a decrease in users or usage. Be firm on the budget cap communicated to the supplier, leveraging it to negotiate a more favorable renewal rate.
Negotiate to have any auto-renewal language removed in order to preserve flexibility for future negotiations. This helps prevent being locked into terms that may not reflect your future needs.