506(b) vs 506(c): Which Reg D Exemption Should Your Fund Use?

If you’re forming a private fund in the United States, you’re almost certainly relying on Regulation D to avoid registering the offering with the SEC. And within Reg D, the choice comes down to two rules: 506(b) and 506(c).

Both exemptions allow you to raise unlimited capital without SEC registration. Both result in restricted securities that can’t be freely traded. Both preempt state securities registration requirements. But the similarities end there. The differences between these two rules affect how you market the fund, who can invest, and what verification procedures you need to follow.

Getting this wrong has real consequences, from rescission rights for investors to potential SEC enforcement. Here’s how each rule works and how to decide which one fits your fundraise.

What Rule 506(b) Allows

Rule 506(b) has been the default private placement exemption for decades. Most private funds (PE, VC, hedge, real estate) have historically raised capital under 506(b).

The key features:

No general solicitation or advertising. You cannot publicly market the offering. No social media posts about the fund, no advertisements, no mass emails to people you don’t have a pre-existing substantive relationship with. Every investor must come through your existing network or through warm introductions.

Up to 35 non-accredited investors. This is 506(b)‘s unique feature. You can accept up to 35 investors who don’t meet the SEC’s accredited investor thresholds, provided they are “sophisticated,” meaning they have sufficient knowledge and experience in financial matters to evaluate the investment. In practice, most fund managers avoid non-accredited investors because of the additional disclosure requirements, but the option exists.

Self-certification of accredited status. For accredited investors, 506(b) allows you to rely on the investor’s own representation that they meet the accredited investor thresholds. A signed questionnaire or subscription agreement where the investor checks a box confirming their status is generally sufficient. No third-party verification is required.

Pre-existing substantive relationship requirement. The SEC has clarified that the prohibition on general solicitation means you must have a pre-existing substantive relationship with each investor (or the person who introduced them). This relationship should be established before you begin the offering, not created through the offering process itself.

What Rule 506(c) Allows

Rule 506(c) was created by the JOBS Act of 2012 and became effective in September 2013. It was designed to modernize private capital formation by removing the general solicitation restriction, with a trade-off.

The key features:

General solicitation is permitted. You can publicly advertise the fund. This includes social media, website content, public speaking engagements where you reference the offering, mass emails, and any other form of broad communication. This is the fundamental advantage of 506(c) over 506(b), though it also changes the economics of your fundraise. Managers using 506(c) often weigh whether to run outreach in-house or engage a placement agent, and understanding placement agent fees and structures helps frame that decision.

All investors must be accredited. No exceptions. Unlike 506(b), there is no allowance for non-accredited investors, regardless of their sophistication level.

Verification of accredited status is required. This is the critical trade-off. Self-certification is not enough under 506(c). The fund manager must take “reasonable steps” to verify that each investor is actually accredited. The SEC provided a non-exclusive list of verification methods:

• Income test: Reviewing IRS forms (W-2s, K-1s, tax returns) for the two most recent years, plus obtaining a written representation regarding expected income for the current year.
• Net worth test: Reviewing bank statements, brokerage statements, and other asset documentation, combined with a consumer credit report to check liabilities, all dated within the prior three months.
• Third-party confirmation: Obtaining a written confirmation from a registered broker-dealer, SEC-registered investment adviser, licensed CPA, or attorney that the person is accredited.
• Existing investor re-verification: For someone who invested in a prior fund as a verified accredited investor, obtaining an updated certification that their status hasn’t changed.

Side-by-Side Comparison

Practical Implications for Fund Managers

The General Solicitation Question

The general solicitation restriction under 506(b) is both its biggest limitation and, paradoxically, rarely a binding constraint for established managers. Most PE and VC fundraises happen through existing relationships and warm introductions. Managers aren’t running Google Ads to find LPs.

Where 506(c) becomes attractive:

• Emerging managers without deep LP networks who need to build relationships from scratch and want to leverage content marketing, social media, and public visibility to do it.
• Managers targeting high-net-worth individuals or family offices who may be reached more effectively through broader outreach.
• Managers using online platforms or digital channels as a meaningful part of their fundraise strategy.

Where 506(b) remains the default:

• Established managers with existing LP bases who are raising successor funds primarily from re-ups and warm referrals.
• Managers who want to include a small number of non-accredited but sophisticated investors (sometimes strategically important individuals like industry operators or advisors).
• Managers who want to avoid the administrative burden and potential friction of accredited investor verification.

The Verification Burden

The accredited investor verification requirement under 506(c) is the primary reason most fund managers still default to 506(b). Asking a prospective LP to hand over tax returns, bank statements, or a credit report creates friction in the relationship. For an institutional investor or a returning LP, this can feel intrusive and unnecessary.

Some practical considerations:

• Third-party verification services can reduce the friction. Several providers handle the verification process so the fund manager never sees the investor’s personal financial documents directly. This is increasingly common.
• The attorney/CPA letter route is often the smoothest path for high-net-worth individuals. Their existing advisors provide a written confirmation, and the investor doesn’t need to share documents with the fund.
• Re-verification for existing investors is simpler. If someone invested in your prior fund under 506(c) and you verified them then, you can accept an updated certification rather than going through the full process again.

The Pre-Existing Relationship Gray Area

One of the trickiest aspects of 506(b) is determining what constitutes a “pre-existing substantive relationship.” The SEC hasn’t provided a bright-line rule, which creates uncertainty.

Generally accepted:

• Relationships established through your professional network before the offering.
• Introductions through an existing LP, adviser, or mutual contact with a substantive connection to you.
• Contacts from a registered broker-dealer who has pre-qualified the investor.

Generally risky:

• Contacts acquired through a webinar or conference where you discussed the fund.
• Email list subscribers who signed up through your website.
• LinkedIn connections you haven’t had substantive interaction with.

If your fundraise strategy involves any outreach that could be interpreted as general solicitation, 506(c) is the safer path. The worst outcome is being stuck in the middle: relying on 506(b) while engaging in activities that could be characterized as general solicitation, which could void the exemption entirely.

Common Mistakes

Accidentally engaging in general solicitation under 506(b). This is the most common and most dangerous mistake. A social media post, a public interview, or a conference presentation that mentions the fund in promotional terms can be treated as general solicitation. If you’re operating under 506(b), any public communication about the offering needs to be reviewed carefully.

Relying on self-certification under 506(c). Some managers elect 506(c) for the general solicitation benefit but then fail to actually verify accredited status. A subscription agreement checkbox is not sufficient verification under 506(c). If the SEC examines the offering, inadequate verification could result in a loss of the exemption.

Not making the election before launch. The choice between 506(b) and 506(c) should be made and documented before the fundraise begins. Trying to switch between exemptions mid-fundraise, or worse, not clearly electing one at all, creates legal risk that is entirely avoidable. For a broader view of compliance requirements across the fund formation process, see our capital raising compliance guide.

Ignoring Form D filing requirements. Both exemptions require a Form D filing with the SEC within 15 days of the first sale of securities. While the SEC has not historically revoked exemptions solely for late Form D filings, some states have separate filing requirements with penalties for non-compliance. This is a basic compliance step that gets missed more often than it should.

Over-restricting under 506(b) when 506(c) would serve better. Some managers default to 506(b) out of habit when their actual fundraise strategy (heavy digital outreach, limited existing LP network, no non-accredited investors) is better suited to 506(c). Don’t choose 506(b) by default. Choose it because the restrictions align with how you actually plan to raise.

How to Choose

The decision framework is straightforward:

Choose 506(b) if:

• Your LP pipeline consists primarily of existing relationships and warm introductions.
• You want to include non-accredited but sophisticated investors (advisors, operators, strategic individuals).
• You want to minimize investor onboarding friction by accepting self-certification.
• You have no need or intention to publicly market the offering.

Choose 506(c) if:

• You plan to use any form of general solicitation: social media, content marketing, public advertising, mass outreach to people without a pre-existing relationship.
• Your entire investor base will be accredited investors.
• You’re comfortable implementing a verification process (directly or through a third-party provider).
• You’re an emerging manager building an LP base from scratch and need maximum outreach flexibility.

In either case, this is a decision that should be made with your fund counsel, documented in your offering materials, and consistently followed throughout the fundraise.

The Bottom Line

Both Rule 506(b) and Rule 506(c) let you raise unlimited capital without SEC registration. The trade-off is simple: 506(b) gives you flexibility on investor types and verification but restricts how you find those investors. 506(c) gives you flexibility on outreach but restricts you to verified accredited investors only.

For most established fund managers with strong networks, 506(b) remains the practical default. For emerging managers who need to build visibility and can live with verification requirements, 506(c) opens doors that would otherwise stay closed. Neither is inherently better. The right choice depends entirely on how you plan to run your fundraise.