Grant writing best practices used to be evergreen advice you could reuse for years: research the funder, follow the rubric, tell a clean story. That assumption stopped being safe on May 29, 2026, when the Office of Management and Budget published a 412-page proposed rule to rewrite the regulations that govern every federal grant. It lands on top of the 2024 Uniform Guidance revisions that are already in force. If your proposal template predates these two changes, you are writing to a rulebook that no longer exists.

What Actually Changed — and When

Two regulatory waves are hitting at once, and good grant writing best practices now mean writing for both. The first wave is settled law. In April 2024 OMB issued the most significant revisions to the Uniform Guidance since 2013, and they apply to federal awards starting on or after October 1, 2024. Among the concrete changes, the U.S. Environmental Protection Agency’s summary confirms the Single Audit threshold was raised to $1,000,000, up from $750,000. The statutory audit trigger itself sits in 2 CFR 200.501, which now requires a single or program-specific audit only once an entity expends $1 million or more in federal funds in a fiscal year.

Timing matters here, because the 2024 changes do not all switch on at the same moment. Administrative and cost provisions generally apply to awards issued on or after October 1, 2024, while the audit changes in Subpart F key off your fiscal year — they apply to fiscal years beginning on or after that date. A nonprofit with a June 30 year-end, for example, first feels the revised audit rules in its fiscal year that began July 1, 2025. The practical result is that most organizations now administer a blend of older awards under the prior guidance and newer awards under the revised rules, so the “current” best practice depends on which award you are writing for.

The second wave is brand new and still in motion. The proposed rule OMB and participating agencies published on May 29, 2026 would do far more than tidy up definitions — it would convert the governmentwide framework in Subtitle A of Title 2 from “guidance” into a binding OMB regulation, centralize future updates through OMB rulemaking, and tighten controls across the full lifecycle of an award. The public comment window runs 45 days, closing July 13, 2026, under Docket OMB-2026-0034. Nothing in that proposal is final yet, but it signals exactly where reviewers and program officers are being told to focus, and it gives applicants a rare preview of the standards their next several submissions will be judged against.

Write to Measurable Outcomes, Not Mission Statements

The single most durable shift across both waves is the move from intentions to evidence. Older proposals could lean on a compelling mission and a passionate needs statement. Current rules expect you to prove you can measure results. The 2024 revisions sharpened the language in 2 CFR 200.301, requiring federal agencies to set program goals and measure recipient performance against them — and that requirement has filtered into recent Notices of Funding Opportunity as more pointed evaluation criteria.

In practice, that means every major activity in your narrative should map to a specific output or outcome with a named data source and collection method. A line like “we will improve workforce readiness” is no longer enough; reviewers want “we will enroll 120 participants, of whom 80% complete the credential, measured by quarterly registrar data.” Applications that cannot describe their evidence standard or tie activities to a measurable result are increasingly flagged in project-design and evaluation reviews. If your organization struggles to translate program ambition into a defensible logic model, that is precisely the gap professional grant writing services are built to close. The fix is not more adjectives; it is a tighter chain from need to activity to metric to reported outcome.

Budget Like an Auditor Is Reading It

Budget narratives are where the 2024 revisions bite hardest, and where reusing an old template quietly costs points. Three numbers changed. The de minimis indirect cost rate rose to up to 15%, the equipment and supply expensing threshold moved from $5,000 to $10,000, and the Single Audit threshold climbed to $1,000,000. A budget built on the old figures looks careless to a reviewer and creates avoidable findings later. Advisory firms preparing clients for spring 2026 Single Audit readiness stress that procurement files, eligibility documentation, and grant accounting reconciliations remain the most common finding areas — and those weaknesses usually trace back to how the budget and internal controls were described at the application stage.

The best practice is to write the budget narrative as if the auditor and the reviewer are the same person. Show every cost as allowable, allocable, and reasonable; reconcile the requested total to the line items to the dollar; and state your indirect rate basis plainly. If you are screening opportunities before you commit weeks to a proposal, OpenGrants’ grant database helps you confirm award sizes and cost rules before you build a budget you later have to defend.

Indirect costs and subrecipients are where files unravel

Two details inside the 2024 revisions deserve their own attention because they routinely generate audit findings. First, a pass-through entity must accept a subrecipient’s federally negotiated indirect cost rate, and neither an agency nor a pass-through may force a de minimis rate below the standard — so if you are the prime, your budget needs to honor your subrecipients’ rates rather than capping them. Second, the substance of a relationship, not the title on the agreement, decides whether a partner is a subrecipient or a contractor, and that determination has to be documented. Spell out both in the proposal. A budget that quietly underfunds a subrecipient’s indirect costs, or that mislabels a vendor as a subrecipient, is the kind of detail that survives the review and then surfaces as a finding two years later.

Align With Agency Priorities Before You Submit

The May 2026 proposed rule makes one thing unmistakable: agency discretion over which proposals advance is expanding. The draft would add a pre-issuance review in which senior agency officials independently assess discretionary awards for consistency with law and stated priorities, and it explicitly states that peer-review recommendations remain advisory rather than binding. Legal analysts who walked through the proposed changes to 2 CFR Part 200 note that the rule would also broaden the risk factors agencies may weigh against an applicant, from financial capacity and audit history to documented “questionable practices.”

For the writer, the takeaway is concrete. Open the Notice of Funding Opportunity, find the program’s authorizing purpose and the administration priorities it cites, and mirror that language in your project summary and objectives. Do not bury alignment three pages deep. Reviewers and the new layer of senior reviewers are looking for an immediate, explicit fit with the program’s stated intent. For more on reading a solicitation strategically, our grant writing resource library walks through how to reverse-engineer scoring criteria from the NOFO itself.

Termination-Proof the Proposal You Submit This Year

Best practices now extend past the award decision. The proposed rule would make discretionary termination language mandatory in all federal awards, authorizing an agency to end an award when it “no longer effectuates program goals, Federal agency priorities, or the national interest.” Firms tracking the rulemaking, including Clark Nuber’s summary of the OMB proposal, also flag a new E-Verify requirement for all recipients and subrecipients and tighter restrictions on certain foreign collaborations and cost categories.

You cannot eliminate that risk, but you can write to reduce it. Frame deliverables around outcomes the agency has publicly committed to, document your compliance infrastructure, and avoid scope language that could read as outside the program’s authorized purpose. If you rely on subrecipients, name your monitoring plan in the proposal rather than treating it as an afterthought. When the stakes justify it, bringing in an experienced grant writer who tracks these rules in real time is cheaper than losing an award to a compliance gap you could have closed on paper.

Frequently Asked Questions

Are these grant writing best practices already required, or just proposed?

Both, depending on which change you mean. The 2024 Uniform Guidance revisions — the higher Single Audit and indirect-cost thresholds and the performance-measurement language — are in force for federal awards issued on or after October 1, 2024. The broader overhaul OMB published on May 29, 2026 is still a proposed rule, open for public comment until July 13, 2026, and not yet binding.

Do these changes apply to state and foundation grants too?

The federal rules apply directly to federal awards and to subawards passed down from them. They do not govern private foundations. In practice, though, foundations and many state programs mirror federal expectations on outcome measurement and budget discipline, so writing to the federal standard rarely hurts a non-federal application and usually strengthens it.

What is the single biggest mistake under the new rules?

Reusing a pre-2024 template without updating the budget figures or the evaluation section. Old thresholds and a mission-driven needs statement that never names a measurable outcome are the two fastest ways to signal that a proposal is out of date, both to reviewers and to the auditors who come later.

Should I wait for the proposed rule to be finalized before applying?

No. Open opportunities operate under current rules, and deadlines will not pause for the rulemaking. Apply now, write to the 2024 revisions that are already in effect, and treat the May 2026 proposed rule as a preview of where agency priorities are heading so your narrative ages well.

Bottom Line: Update the Template, Not Just the Story

The most useful thing you can do this quarter is stop treating grant writing best practices as a fixed checklist. The 2024 Uniform Guidance revisions already changed the math of a compliant budget, and the May 2026 proposed rule signals that alignment with stated program priorities and audit-ready documentation will only matter more. The applicants who win in this environment are the ones who rebuild the template — outcomes mapped to metrics, budgets reconciled to the new thresholds, and a project summary that names the program’s purpose in the program’s own words.

If you have proposals going out before July, audit them now: refresh every budget figure to the current thresholds, add a measurable outcome to each objective, and lead with priority alignment. When the deadline is real and the award is worth defending, OpenGrants’ managed grant writing team can pressure-test your draft against the current 2 CFR Part 200 rules before it reaches a reviewer — and before it reaches an auditor.