Fund Finance: Subscription Lines and NAV Loans for VC Funds

Most conversations about leverage in venture concern portfolio companies — venture debt, revenue lines, bridge notes. But funds themselves borrow, above the LP equity layer, and as venture institutionalizes, fund-level finance has moved from a large-buyout curiosity to something even a $50M seed fund gets pitched. The two dominant instruments are subscription lines and NAV loans. They look superficially similar — both are fund-level facilities — but they are secured by entirely different things, used at opposite ends of a fund's life, and carry very different controversy loads.

Subscription lines (capital call facilities)

A subscription line — "sub line" or capital call facility — is a revolving credit facility secured not by the portfolio but by the fund's right to call undrawn capital from its LPs. The collateral is the LPs' unfunded commitments and the GP's contractual power to draw them.

How it works

• The lender sizes a borrowing base against the undrawn commitments of the fund's LP pool, weighting institutional LPs more heavily than individuals.
• The fund draws the line to make investments and pay expenses before calling capital from LPs.
• Periodically — quarterly, or on a fixed cadence — the GP calls capital and repays the line. Facilities typically require each borrowing to be cleaned down within a defined window.

Why VC funds use them

• Operational sanity. Instead of a capital call for every check — untenable for a seed fund making thirty investments a year — the fund batches calls into two to four per year. LPs' treasury teams strongly prefer this.
• Speed and certainty. The fund can wire a closing this week and true up with LPs next quarter. In competitive rounds, that matters.
• Cleaner LP mechanics. Fewer calls means fewer late or defaulted calls to chase, which matters more as venture LP bases fill with individuals and smaller family offices whose responsiveness varies.

Who provides them

The venture-focused banking ecosystem: Silicon Valley Bank (now part of First Citizens) built the category and remains a major provider; HSBC Innovation Banking, Citizens Private Bank, Bridge Bank, Comerica, Customers Bank, and J.P. Morgan's innovation economy practice all bank funds and offer capital call facilities. For small funds, the practical constraints are the LP base (a fund of mostly individuals supports a smaller borrowing base than one anchored by institutions) and minimum facility economics — below a certain fund size the line may not be worth the documentation.

Pricing is a modest spread over a benchmark rate plus unused fees — cheap, because the collateral is diversified, contractual, and high-quality.

The IRR effect — and the honest way to handle it

The controversy around sub lines is not credit risk; it is reporting. IRR is a time-weighted metric that starts the clock when LP cash is actually drawn. A fund that finances investments on the line for months before calling capital compresses the measured holding period of LP cash — and mechanically raises reported IRR without changing a single investment outcome. Held long enough, a sub line can add real, visible IRR to a track record.

In venture this is less distorting than in buyouts — early-stage returns are so multiple-driven that TVPI and DPI dominate the conversation — but it is not zero, especially for funds marketing an early IRR on Fund I while raising Fund II. The discipline, pushed by ILPA guidance and increasingly demanded by LPs:

• Report returns both with and without the facility's effect. Sophisticated LPs will compute it anyway; volunteering it builds trust.
• Keep clean-down periods honest. A line used for 30–90 day bridging is operational convenience; one that stays drawn for a year is return engineering.
• Disclose the facility's size, tenor, and use in the LPA and quarterly reporting. Surprises here are expensive.

NAV loans

A NAV loan is secured by the net asset value of the fund's existing portfolio — the equity stakes the fund already owns. It appears later in a fund's life, once capital is deployed and there is a portfolio to lend against. In venture, dedicated NAV lenders such as 17Capital and Hark Capital built the category, and several banks now participate at the larger end.

Why a venture GP might use one

• Funding follow-ons after the fund is fully invested. The classic venture case: the fund is out of reserves, a winner is raising an up round, and pro rata is valuable. A NAV facility can fund the follow-on without a new vehicle or an emergency LP process.
• Bridging to known liquidity. An exit has signed but not closed; the facility advances against it rather than forcing a fire-sale secondary.
• Generating DPI without selling. The most contested use: borrowing against the portfolio to distribute cash to LPs while continuing to hold the assets.

Why venture NAV lending is harder than buyout NAV lending

Venture portfolios make awkward collateral. Positions are minority stakes with no control over exit timing; valuations rest on the last round's price, which may be stale; and outcomes are power-law distributed, so a portfolio's value may concentrate in two names. Lenders respond with conservative loan-to-value ratios and eligibility criteria favoring diversified, later-stage, marked-up portfolios. A concentrated seed portfolio is usually not financeable this way — often to its GP's benefit.

The risks, plainly

• Cross-collateralization. The facility is secured by the whole portfolio: a loan taken to support one company puts the value of the others behind it.
• Leverage on leverage. Portfolio companies may carry venture debt; a NAV loan stacks a second borrowing on the same underlying assets.
• Valuation dependence. The borrowing base rests on marks the GP itself sets. A markdown cycle can trigger repricing or repayment exactly when liquidity is scarcest.
• Debt-funded distributions. DPI manufactured with borrowed money is not realized return — it is an advance against future exits, with interest, and LPs increasingly ask which kind of DPI they are looking at.

Adjacent instruments worth knowing

Two more pieces of the fund finance landscape reach GPs directly:

• GP commit financing. Emerging managers often cannot fund a 1–2% GP commitment from savings. Lenders (including the NAV specialists above) and some anchor LPs finance GP commits — useful, but disclose it; LPs read a borrowed commit differently than an earned one.
• Management company facilities. Working-capital lines to the management company itself, secured by fee streams, smooth the gap between fund closes. Routine and uncontroversial, but keep management company debt strictly separate from fund obligations.

The bottom line

Subscription lines are mature, cheap, and — used with short clean-downs and honest reporting — pure operational convenience. NAV loans are more powerful and more contested: legitimate for funding pro rata in winners or bridging signed exits, corrosive when used to manufacture distributions a portfolio has not earned. The questions that separate good practice from bad are the same ones LPs will ask you: What is the collateral? What are the proceeds for? And does your reported return say what the financing did? GPs who answer those before being asked tend to be the ones whose next fund closes.