During the negotiation, discuss the following points: - Payment Due Date: Clearly outline when the payment is expected. - Late Fees: Specify any late fees that will be incurred if payment is delayed. - Early Payment Discounts: Offer incentives for early payment if it benefits your cash flow. - Partial Payments: Consider if partial payments are acceptable and under what conditions. - Payment Methods: Agree on the acceptable methods of payment, such as bank transfer, credit card, or checks.