Co-Sponsors and Key Principals for Your First Deal
A co-sponsor is a partner who shares the work and economics of running a syndication. For a first-time sponsor, a good one can fill the gaps a lender or investor worries about: a track record, a stronger balance sheet, a person who can sign the loan guarantee, and deal flow. A key principal is the person (or people) a lender looks to for experience and financial strength behind the loan. If you are the sponsor, DoorRaise lets you list each person's role in the deal and runs the bad-actor checks on them.
This post is part of our guide to real estate syndication. It covers partnering, not the full first-deal plan, which is in first-time sponsors with no track record. Rules are as of October 2026.
What does a co-sponsor bring?
Usually one or more of these:
- Track record. Past deals you can describe honestly to investors and lenders.
- Balance sheet. Net worth and liquidity that the lender wants to see behind the loan.
- Loan guarantee. Willingness to sign a guarantee. See loan guarantors.
- Deal flow. Access to deals, broker relationships and market knowledge.
- Operating experience. Someone who has run a building and can oversee a property manager.
Sort your own gaps first. A partner who adds experience you lack is worth more than one who duplicates what you have.
What do lenders expect from a key principal?
It depends on the lender and loan program. Lenders commonly look at the experience of the people behind the borrower, their financial strength and sometimes their credit history, and they may require one or more of them to sign guarantees. Programs differ on how much they require and what they count, so ask your loan broker or lender for the written requirements. Do not assume that being the person who raises the equity makes you the key principal. The lender decides who qualifies.
How can you partner?
| Structure | How it works | Points to think about |
|---|---|---|
| Joint venture | Two sponsors share one deal under an agreement | Both are real sponsors; see JV vs. syndication |
| Junior partner | An experienced sponsor leads, and you take a smaller role and share | Your role and share should reflect your real work |
| Mentor arrangement | A seasoned sponsor guides you and may guarantee the loan for a share | Define how long it lasts and what happens on the next deal |
| Team | A few people with different skills (operations, finance, raising) form the sponsor group | Write each person's duties down |
Describe what each person will do after closing, not just who finds the investors.
How do you split sponsor economics?
The sponsor group's pay generally comes from fees and from the promote, which is a share of profits above the investors' preferred return (see the waterfall and promote and how sponsors get paid). Between partners, you can split these by agreement: who gets which fee, how the promote is divided and what happens if someone leaves. We do not give typical percentages, because they vary by deal and role and we do not have a source for a figure we could stand behind.
Questions to settle in writing:
- Which fees does each partner receive, and for what work?
- How is the promote divided, and does a share vest over time?
- Who contributes how much cash, and on what terms?
- Who decides what, and what needs both signatures?
- What happens if one partner is removed, dies or stops working?
Be careful about paying someone to bring investors
If a partner's main job is to find investors and they are paid based on the money they raise, that can raise broker-dealer registration questions. A partner who is a real sponsor has duties after closing, capital in the deal and pay through the fees and promote, not per dollar raised. Read paying capital raisers before you offer anyone a share for introducing investors, and talk to a securities attorney.
How do you check a prospective partner?
Investors will check you, so check your partner first:
- Past deals. Ask for a list, the property addresses and the outcomes, including deals that did not go well. Verify what you can in county records.
- References. Speak to past investors, lenders and property managers.
- Public records. Search court records, liens and the state business registry.
- The bad-actor rule. Rule 506(d) disqualifies an offering if a covered person has certain court orders, regulatory actions or convictions. Covered persons include the issuer, its directors and officers, its general partners and managing members, 20% beneficial owners, promoters and anyone paid to solicit investors. A co-sponsor is almost always covered. See the bad actor rule. On DoorRaise, everyone with a role answers a questionnaire; see ID and background checks.
- Money and character. Ask directly about lawsuits, bankruptcies and disputes with investors.
A clean search does not prove someone is a good partner, but a problem you find now is far cheaper than a problem you find after closing.
What might a lender ask you to show?
Requirements differ by lender and program, so ask for them in writing. Commonly, lenders want some mix of the following from each key principal or guarantor:
- A personal financial statement showing assets and debts
- A schedule of real estate owned, with the properties, loans and outcomes
- A statement of contingent liabilities, such as other guarantees
- Bank or brokerage statements showing liquid assets
- Background and credit checks, and answers to questions about past lawsuits or defaults
If you are the junior partner, you will probably be asked for some of this too, and you should expect your partner to ask for yours. It is a normal part of vetting each other, not an insult.
Put it in writing, and disclose it
Sign a written agreement before you go under contract. It should name the roles, the economics, the contributions, the decisions each partner controls, what happens on exit or disagreement, and how you will handle a capital call. Have your own attorney read it.
Then disclose it to investors. Their documents should say who the sponsors are, what each one does, how each is paid and what each is investing. A partner who is not mentioned, or pay that investors cannot see, is the kind of omission that creates legal risk (see Rule 10b-5).
Common mistakes
- Giving a title and a share to a friend who has no role after closing
- Leaving the deal terms between partners on a handshake
- Skipping the bad-actor check for the partner because "everyone knows them"
- Picking a partner by their followers instead of their experience
- Promising a lender a guarantee a partner has not agreed to sign
How DoorRaise fits in
On DoorRaise, you list the people in the deal and their roles, and each person with a role answers a short questionnaire so the checks are on record. A promoter who joins another sponsor's deal does so as a co-sponsor with a duty that continues after closing, and a fixed share of the sponsors' pay that does not depend on how many investors they bring. DoorRaise does not match you with partners, does not negotiate between them and is not a law firm, broker-dealer, investment adviser or funding portal.
The fees are $500 to set up (due when you submit the deal, non-refundable), $5,000 at closing (only if the deal closes, including state filing fees) and $3,500 a year.
Raise your apartment deal from the people who already follow you.
DoorRaise is built for apartment buildings with 5 or more units: one link for the deal, escrow until closing and a standard fee card.
When you have your team, create your sponsor page.
FAQ
Do I need a co-sponsor for my first syndication?
Not always, but a lender may require an experienced key principal or guarantor. Ask for the lender's written requirements early.
What is the difference between a key principal and a guarantor?
A key principal is the person the lender relies on for experience and strength. A guarantor signs a promise to pay certain obligations if the borrower does not. One person can be both, depending on the loan.
Can I pay someone a percentage of what they raise?
That can raise broker-dealer registration questions. See our post on paying capital raisers, and talk to a securities attorney before you agree to any such pay.
Do co-sponsors have to pass the bad-actor check?
In general, yes. Rule 506(d) covers the issuer, its managing members and officers, 20% owners and others, so a co-sponsor will usually be covered.
What should I tell investors about my partner?
Who they are, what they will do, how they are paid and what they are investing. Your offering documents should say it plainly.
Sources
- 17 CFR 230.506: Exemption for limited offers and sales without regard to dollar amount of offering
- SEC: Guide to broker-dealer registration
- 17 CFR 240.10b-5: Employment of manipulative and deceptive devices
This article is general information, not legal advice. Talk to a securities attorney about your deal. DoorRaise is not a law firm, broker-dealer, investment adviser or funding portal.