Many law firms give a discount for quick payment. Many clients leave invoices for services rendered unpaid for many months. This makes for a very unhappy lawyer. It may well be you can get a 2 percent or 3 percent reduction in the bill for regular payment within 10 days. You buy something more than the discount.
Every lawyer loves the client who pays timely.
No lawyer likes to call and beg for payment for services rendered months before. Work out billings to your satisfaction and then honor the agreement. It will be to your benefit, as well as to your lawyer's benefit, to be a client they think of as always timely. Make certain in your retention and your ongoing relationship with your outside counsel that you make crystal clear who the client is. Lawyers need to know who their contact is to whom they owe their final accountability.