Grants.gov vs SAM.gov: Which One Do You Actually Need?

If you’re trying to figure out Grants.gov vs SAM.gov, the short answer is that they do two different jobs: SAM.gov is where you register to do business with the federal government and find contracts, while Grants.gov is where you find and apply for federal grants. But the longer answer matters, because the two portals are connected — you almost certainly need SAM.gov regardless of which path you’re on, and mixing them up costs new organizations weeks. This guide explains what each one is for, how they relate, and which you actually need.

SAM.gov vs Grants.gov: what each one is for

The confusion usually starts with the word “opportunity.” Both sites list federal opportunities, but they’re fundamentally different kinds of money.

A contract is the government buying something for its own use — IT services, construction, janitorial work, supplies. You deliver goods or services, and you get paid. Contracts live on SAM.gov and are governed by the Federal Acquisition Regulation (FAR).

A grant is the government funding your project because it serves a public purpose — research, education, community programs, economic development. You carry out the work and report on it; the money is assistance, not payment for a deliverable the government keeps. Grants live on Grants.gov and follow the Uniform Guidance (2 CFR 200).

Here’s the practical breakdown.

	SAM.gov	Grants.gov
Primary purpose	Register your entity + find contracts	Find and apply for grants
Type of money	Contracts (procurement)	Grants (financial assistance)
Governed by	FAR	Uniform Guidance (2 CFR 200)
Who uses it most	Businesses, contractors	Nonprofits, researchers, state/local govs, some businesses
What you deliver	Goods or services to the government	A funded project serving a public purpose
Registration role	Issues the UEI + CAGE code	Uses your SAM.gov registration
Cost	Free	Free

The single most important thing on that table is the last-but-one row: SAM.gov issues the identifiers both paths depend on. That’s what makes it the front door.

Pro Tip: If you take away one thing: register in SAM.gov first, no matter what. Contracts or grants, your entity needs an active SAM.gov registration and a UEI before anything else can happen.

Do you need to register on both?

Not necessarily — it depends on which kind of money you’re after. But the order never changes.

1. Register your entity in SAM.gov. This is required to receive any federal award, contract or grant. You’ll get a Unique Entity ID (the UEI, which replaced the DUNS number in 2022) and a CAGE code. This step is the same regardless of your path. (Our SAM.gov registration guide walks through it step by step, including the errors that cause delays.)
2. If you want contracts, you’re basically done. Contract opportunities are on SAM.gov itself. Set up saved searches and start pursuing.
3. If you want grants, register on Grants.gov too. Grants.gov uses your SAM.gov registration and UEI to verify your organization, then lets you search funding opportunities and submit applications.

So the honest answer to “do I need both?” is: everyone needs SAM.gov; you add Grants.gov only if you’re pursuing grant funding.

Pro Tip: Grants.gov won’t let you submit an application without an active SAM.gov registration, and SAM registration can take days to weeks to validate. Start SAM.gov well before any grant deadline you care about.

Which one is right for your organization?

The cleanest way to decide is by what you do and what you’re offering the government.

Start with SAM.gov (contracts) if you:

• Sell products or services a government agency would buy — IT, construction, facilities, professional services, supplies.
• Want to be paid to deliver something specific.
• Are a small business pursuing set-asides (8(a), WOSB, HUBZone, SDVOSB).

Add Grants.gov (grants) if you:

• Are a nonprofit, university, research institution, or state/local government.
• Have a project or program that serves a public purpose and needs funding.
• Are pursuing research funding like SBIR/STTR (common for tech and product companies).

Use both if you:

• Are a business that both sells services and does fundable research or community work.

“The mistake I see most often is a company chasing a grant when what they actually want is a contract — or registering on Grants.gov and never touching SAM.gov, then wondering why they can’t get paid to do the work they’re best at.” — a common observation among procurement advisors

How do you find opportunities on each?

Once you’re registered, the search experience is different on each site, and neither is built for speed.

• On SAM.gov, filter contract opportunities by NAICS code, set-aside type, and place of performance, and subscribe to email alerts. There’s no match scoring and no way to save a shortlist across sessions.
• On Grants.gov, search funding opportunities by category, agency, and eligibility, and set up saved searches. Eligibility rules are strict, so read them before investing time in an application.

	SAM.gov search	Grants.gov search
Filter by	NAICS, set-aside, location	Category, agency, eligibility
Alerts	Email by saved search	Email by saved search
Match scoring	No	No
Cross-session shortlist	No	No
Best for	Contract solicitations	Grant funding announcements

Both work, but both leave you running a stale search every morning and pasting promising items into a spreadsheet. That’s the gap a unified feed like RFPHawk is built to close.

Key Takeaways

SAM.gov and Grants.gov solve different problems, but SAM.gov is the foundation for both — so it’s almost always where you start.

Point	Details
Contracts vs grants	SAM.gov = contracts (you deliver, you’re paid). Grants.gov = grants (you’re funded for a public purpose).
SAM.gov comes first	It issues the UEI and CAGE code required for any federal award, contract or grant.
You may not need both	Everyone needs SAM.gov; add Grants.gov only if you’re pursuing grant funding.
Register early	SAM.gov validation takes days to weeks — start before any deadline.
Neither has match scoring	Both leave you searching manually with no way to rank opportunities by fit.

Why the contract-vs-grant distinction trips everyone up

We’ve watched a lot of capable organizations lose weeks to this exact confusion. Someone hears “there’s federal money available,” lands on whichever portal a search engine served first, and starts registering — often the wrong one for what they actually want. Then a deadline looms, they discover they needed a SAM.gov registration that takes weeks to validate, and the opportunity is gone.

The distinction feels bureaucratic, but it’s not arbitrary. A contract and a grant are legally different relationships with different rules, reporting, and expectations. Treating them as interchangeable is how good applications get rejected on technicalities. The fix is simple: decide whether you want to sell something to the government (contract) or be funded by it for a public purpose (grant), and let that choice tell you where to spend your time. Then register in SAM.gov first, because both roads run through it.

— The RFPHawk Team

RFPHawk: contracts and grants in one feed

Here’s the good news: you don’t have to pick a portal and check it by hand every morning. RFPHawk pulls opportunities from both SAM.gov and Grants.gov — plus a growing list of state and local sources — into a single feed, then scores them against your profile so the ones worth your time rise to the top.

Whether you’re chasing contracts, grants, or both, you can browse live opportunities free without an account. Match scoring, saved searches, and deadline tracking come with RFPHawk Pro — a 14-day free trial, cancel anytime — so you see everything in one place instead of two clunky portals. It won’t replace your SAM.gov registration, but it will make finding the right opportunities a lot less painful.

FAQ

What is the difference between Grants.gov and SAM.gov?

SAM.gov is where you register your entity to do business with the federal government and where you find contract opportunities. Grants.gov is where you find and apply for federal grants. Contracts buy goods and services for the government; grants fund your project for a public benefit.

Do I need to register on both Grants.gov and SAM.gov?

You need SAM.gov first — it issues the Unique Entity ID (UEI) required for any federal award. If you plan to apply for grants, you then register on Grants.gov, which uses that SAM.gov registration. For contracts only, SAM.gov alone is enough.

Is SAM.gov only for contracts?

No. SAM.gov handles entity registration for both contracts and grants, so it’s the foundation for either path. It also hosts federal contract opportunities. Grants.gov is the separate portal specifically for finding and applying to grants.

Which should a small business use, Grants.gov or SAM.gov?

Most small businesses selling products or services start with SAM.gov, since that’s where contracts live. Grants.gov matters if you’re pursuing grant funding — common for research, nonprofits, and programs like SBIR/STTR. Many organizations end up using both.

Do I need SAM.gov registration to apply for a grant?

Yes. To receive federal grant funding your organization must have an active SAM.gov registration with a valid UEI. Grants.gov will not let you submit an application without it, so SAM.gov registration comes first either way.