What Is a Side Letter in a Real Estate Fund LPA and When Do Institutional LPs Require One?

What is a side letter in a real estate fund LPA? A side letter is a bilateral agreement between a fund's general partner and a single limited partner that supplements the main limited partnership agreement for that investor only. It grants that LP specific rights, accommodations, or economic terms that differ from the fund's standard terms, without changing the LPA for every other investor. Side letters are standard practice in institutional private funds, including real estate, and most institutional LPs will request one before committing capital.

The real issue for sponsors is not whether side letters exist. They will. The issue is whether you can contain the downstream impact of each concession you agree to.

Three things every first-time sponsor should know before the first institutional LP conversation:

• A side letter sits on top of the LPA. It must be consistent with the LPA, not contradict it. The private placement memorandum for a real estate closed-end fund should already disclose that side letters may be used and that the fund permits them.
• Every provision you grant to one LP is a potential obligation to every other LP who holds a most-favored-nation clause.
• Unmanaged side letters do not just create administrative work. They can distort fund economics, create governance conflicts, and slow down the path to first close.

When Institutional LPs Require a Side Letter

Not every LP will ask for a side letter. Smaller check writers and high-net-worth individuals often sign the standard subscription package and move on. Institutional LPs are different. According to a 2025 ILPA member survey, 69% of large LPs reported having more negotiating power than in prior fundraising cycles, and they are using it. Institutional LPs require customization because their regulatory constraints and internal governance mandates cannot always be resolved through the standard subscription agreement alone.

Two broad categories of requests drive most side letter negotiations:

Compliance-driven requests are largely non-negotiable. A public pension fund genuinely cannot invest without FOIA protections. An ERISA plan genuinely cannot participate in certain assets without operating company representations. These are legal requirements, not leverage tactics. Commercial requests are negotiable, but they carry downstream risk that sponsors often underestimate before modeling the full LP base.

What Provisions Show Up Most Often, and Which Are Standard vs Aggressive

The IQ-EQ and Kirkland & Ellis 2026 guide to side letters identifies the most common provisions across institutional private funds and notes that side letters are increasingly routine, especially for larger commitments and first-close investors. For real estate sponsors, the practical question is not just what LPs ask for, but how much flexibility each provision actually costs the fund.

‍Standard vs Aggressive: Where the Line Is

Provisions tied to a specific investor's regulatory status or operational structure are standard asks. ERISA language, FOIA carve-outs, tax timing accommodations, and affiliate transfer rights fall here. Granting them does not typically harm other LPs or alter fund economics.

Provisions become aggressive when they reduce GP economics without a corresponding commitment threshold, create open-ended reporting obligations the team cannot administer consistently, or give one LP veto-adjacent rights over fund decisions. A co-investment right with no carry and no fee at an uncapped allocation level is not a standard ask. A management fee discount with no minimum commitment floor is not a standard ask.

The key test: would granting this provision, at the scale of your full LP base, still leave the fund economically viable and operationally manageable? If the answer is no, the provision needs to be scoped, tiered, or declined.

Why MFN Clauses Are the Real Pressure Point

Most first-time sponsors focus on the individual provision being negotiated. The MFN clause is what makes every individual concession a fund-wide decision.

What MFN means in practice: A most-favored-nation clause gives one LP the right to elect any more favorable terms that the GP grants to any other LP. Grant a fee discount to LP A. If LP B holds an MFN right, LP B can elect the same discount. Grant co-investment rights with no carry to LP C. LP B can elect those too. The bilateral agreement you thought you were making with one investor has just become a multi-investor obligation.

According to Morgan Lewis's fund formation deskbook on side letters and MFN, the MFN election process can snowball after each closing if GPs do not design a single, structured distribution cycle. IQ-EQ and Kirkland & Ellis describe MFN provisions as creating "second-order effects that must be understood from the outset."

How the MFN Cascade Works

1. LP A commits $20M at first close and negotiates a 25 bps management fee discount and an MFN clause with no tier floor.
2. LP B commits $15M at second close and also holds an MFN right. LP B reviews LP A's side letter and elects the same 25 bps discount.
3. LP C commits $10M at final close with MFN rights. LP C elects the fee discount and also elects LP B's enhanced quarterly reporting package.

What started as a single concession to one anchor investor has now reduced management fee revenue across three LPs and added a bespoke reporting obligation the fund did not budget for.

How to Contain It

• Tier MFN by commitment size. An LP committing $5M should not be able to elect terms granted to a $30M anchor.
• Carve out regulatory provisions. ERISA language, FOIA carve-outs, and tax accommodations are not commercial terms and should be explicitly excluded from MFN eligibility.
• Standardize clause language. The more consistent your side letter provisions across investors, the fewer unique terms exist for MFN election.
• Run one election cycle after final close rather than distributing side letters after each closing and triggering repeated rounds of elections.

How to Manage Side Letters Without Derailing the Raise

Side letter management is a process, not a negotiation. Sponsors who treat it as a negotiation — responding to each LP request as it arrives — end up with inconsistent terms, untracked MFN exposure, and legal costs that compress the timeline to first close. The process has to be designed before the first LP conversation starts.

1. Lock your baseline economics in the terms sheet first. Before any LP sees a side letter request, your management fee, carried interest structure, and waterfall should be set in a fund terms sheet. Every side letter request is then measured against that baseline. Sponsors who skip this step negotiate from a blank page and give away economics they did not model.
2. Use the PPM to define the boundaries. The private placement memorandum should disclose that side letters may be used and describe the general categories of accommodations the GP is willing to make. This is not a legal formality. It is the document that governs what can and cannot be modified for individual investors, and it protects the GP if a dispute arises.
3. Build a side letter decision matrix with counsel before outreach. Map out which provisions you will grant, which you will scope or tier, and which are off the table. Assign one person internally to own MFN tracking and compliance from day one.
4. Standardize your language. Bespoke clause language in every side letter multiplies the number of provisions available for MFN election and makes compliance harder to track. Use standardized templates reviewed by fund counsel for recurring requests like reporting, ERISA accommodations, and affiliate transfers.
5. Set a deadline for side letter finalization before first close. Negotiations that drag past the first close deadline create momentum problems and can signal to other LPs that the raise is stalling. The management fee and carried interest structure you established in the terms sheet should not still be in play at closing.

Common Mistakes First-Time Sponsors Make

Most side letter problems are not caused by bad faith. They come from sponsors who said yes without modeling what yes actually meant across the full LP base.

• Agreeing to MFN rights without a tier floor. If any LP can elect any term granted to any other LP, a concession made to your largest investor becomes a concession made to everyone. Always tie MFN eligibility to a minimum commitment threshold.
• Granting fee discounts before modeling the downside. A 25 bps discount on a $100M fund costs $250,000 per year in management fees. If three LPs elect the same discount via MFN, that is $750,000 annually. Model it at target fund size and at 60% of target before agreeing.
• Accepting bespoke reporting obligations without checking capacity. Enhanced quarterly reporting, DEI metrics, and custom ESG disclosures require parallel data workflows. Agreeing to them without understanding the operational cost creates a compliance liability that grows with every close.
• Letting side letter negotiations run past the first close window. Every week of unresolved negotiation is a week of momentum lost. Institutional LPs expect a clear process. Sponsors who cannot close side letters efficiently signal that the fund's governance is not ready for institutional capital.
• Not disclosing side letter use in the PPM. Failure to disclose that side letters exist, or that some LPs received preferential terms, creates legal exposure and LP trust issues later in the fund's life.

Treat Side Letters as a Fund Design Issue, Not a Cleanup Task

Side letters are not exceptions to the fund. They are part of the fund's governance architecture, and they need to be planned before the first LP conversation, not resolved after the first LP objection.

The sponsors who handle side letter negotiations well share one thing in common. They arrived at the table with a clear framework: which accommodations they would grant, which they would scope, and which were off the table. That framework came from their terms sheet, their PPM, and their counsel's review of MFN exposure across the expected LP mix. It did not come from reacting to each request as it arrived.

The core principles:

• Side letters are normal and expected in institutional real estate fundraising. Treating them as a problem signals inexperience.
• Every commercial concession needs to be modeled at fund scale before it is granted, not after.
• MFN rights, fee discounts, and bespoke reporting obligations can cascade. Scope them early or pay for them later.
• The full fund document stack, from the terms sheet to the PPM to the LPA, should be designed with side letter boundaries already built in.

IRC Partners works with real estate sponsors before the first institutional LP conversation to structure fund documents, model economics, and define side letter boundaries that hold up under institutional scrutiny. If you are preparing a $10M or larger raise and want to enter LP negotiations from a position of structural strength, reach out to IRC Partners to discuss how to build the framework before the requests start arriving.

Frequently Asked Questions

Can a side letter override the main LPA in a real estate fund?

A side letter can supplement or modify the LPA for a specific investor, but it cannot contradict the LPA's core terms or grant rights that the LPA explicitly prohibits. Before any side letter is executed, fund counsel should confirm that the proposed terms are consistent with the LPA and that the GP has authority to grant them. Provisions that conflict with the governing fund documents are generally unenforceable.

Do all institutional LPs request side letters, or only the largest ones?

Most institutional LPs will request at least some form of side letter, even if the requests are limited to regulatory accommodations like ERISA representations or FOIA carve-outs. The scope of commercial requests tends to scale with commitment size. A $5M LP may ask for enhanced reporting. A $25M anchor LP may negotiate fee discounts, co-investment rights, MFN protection, and governance visibility. First-time sponsors should plan for side letter requests from every institutional investor, not just the largest ones.

How long does side letter negotiation typically take before first close?

Side letter negotiations for institutional LPs commonly run four to eight weeks from initial draft to execution, depending on the complexity of the provisions and the LP's internal approval process. Public pension funds and sovereign wealth entities often have longer internal review cycles. Sponsors who do not start the process early enough can find side letter negotiations compressing first-close timing or forcing extensions that signal weakness to the broader LP group.

What is the difference between an excuse right and a withdrawal right in a side letter?

An excuse right allows an LP to opt out of a specific investment without withdrawing from the fund entirely. It is common for ERISA-sensitive investors or LPs with ESG exclusion mandates. A withdrawal right allows an LP to exit the fund altogether under defined conditions. Withdrawal rights are more aggressive and less common because they can disrupt fund liquidity, reduce committed capital, and trigger LP advisory committee review. Excuse rights are generally acceptable; withdrawal rights require careful scoping and are rarely granted without significant commitment size or regulatory justification.

Should the existence of side letters be disclosed to all LPs in the fund?

Yes. The PPM should disclose that side letters may be executed and that some LPs may receive preferential terms. The SEC's 2023 Private Fund Adviser Rules increased transparency requirements for registered advisers, requiring disclosure of preferential treatment granted to specific investors. Even for funds below the registration threshold, disclosure in the PPM and LPA is standard practice and protects the GP from breach of fiduciary duty claims by LPs who were not aware that other investors received better terms.

Can a GP refuse to grant a side letter to an institutional LP?

A GP can decline to grant a side letter or specific provisions within one, but doing so carries commercial risk if the LP is a large or strategic investor. Compliance-driven requests, such as ERISA representations or FOIA carve-outs, are rarely refused because they do not cost the GP anything economically. Commercial requests, such as fee discounts or co-investment rights without carry, are more frequently negotiated down or tied to commitment size thresholds. The key is having a clear framework before the conversation starts so the GP is negotiating from a position rather than reacting to pressure.

What happens if two side letters contain conflicting provisions for the same LP right?

Conflicting provisions across side letters create compliance exposure and potential breach of fiduciary duty claims. If LP A's side letter gives the GP discretion over co-investment allocation and LP B's side letter grants LP B a pro-rata right to every co-investment, those two provisions may conflict when a deal arises. This is one of the primary reasons fund counsel recommends standardized side letter language and a provision tracking matrix from the outset of fundraising. Conflicts discovered after execution are expensive and time-consuming to resolve.

Continue reading this series:

• What Fund Documents Do You Need to Raise $100M From Institutional Investors in Real Estate?
• What Is a Fund Terms Sheet? The First Institutional Document in Your Real Estate Capital Raise
• How to Present Management Fees and Carried Interest in a Real Estate Fund Terms Sheet‍