It is helpful to know that proposal review takes time. Some agencies will acknowledge receipt of your proposal with a card or letter, while others will not. A telephone call to the agency may be appropriate if you do not receive an acknowledgment.
Some agencies publish a specific date for announcement of awards.
If not, you should allow at least six months for review of your proposal. Frequently, they will call you. Negotiations of some sort are often part of grant and contract award process. In some cases, the proposal itself must be revised or even resubmitted in a different form. Once the revised budget and other requested information is submitted, the agency will begin processing the formal paperwork to initiate the award.