A subscription line of credit is a revolving credit facility that a fund establishes with a bank, secured by the unfunded capital commitments of its LPs. It allows the GP to fund investments, pay expenses, or bridge timing gaps without issuing a capital call for every transaction.
The mechanics are simple. A bank evaluates the LP base, assigns borrowing capacity based on the creditworthiness of the committed investors, and extends a line that the GP can draw on as needed. When the GP finds a deal and needs to wire funds, they draw on the subscription line instead of sending a capital call notice with a ten-day funding window. The GP later issues a capital call to repay the line, usually within 90 to 180 days.
Subscription lines have become nearly universal. According to a Fund Finance Association survey, over 90% of private equity funds use some form of subscription facility. The primary operational benefit is speed. Deals close on their own timelines, and waiting ten to fifteen business days for LP capital call proceeds can mean losing a competitive process. A subscription line lets the GP wire funds in days, not weeks.
The more contentious benefit is the impact on performance metrics. Because subscription lines delay when LP capital is actually called, they shorten the measured time that capital is at work. This mechanically boosts IRR without changing the total dollars returned. A fund that would show a 15% net IRR with day-one capital calls might show an 18% net IRR when the first twelve months of deals are funded through the line. The MOIC and TVPI remain virtually identical because total cash flows do not change, only their timing.
This IRR inflation has drawn scrutiny. The Institutional Limited Partners Association (ILPA) published guidelines in 2017 recommending that GPs report returns both with and without the impact of subscription facilities. Many institutional LPs now require this dual reporting as a condition of their subscription agreement.
Sizing matters. Most facilities range from 15% to 30% of total commitments. Going higher increases the IRR distortion and raises leverage concerns. The facility is collateralized by LP commitments, not fund assets, so the risk to LPs is that a wave of defaults among other investors could force accelerated capital calls to repay the lender. Banks mitigate this by underwriting the LP base carefully, which is why funds with blue-chip institutional investors receive better pricing and higher borrowing limits.
Frequently Asked Questions
How do subscription lines affect fund IRR?
Subscription lines delay when LP capital is called, which shortens the measured holding period for investments and mechanically boosts IRR. The Institutional Limited Partners Association (ILPA) has published guidelines asking GPs to report IRR both with and without the impact of subscription lines so LPs can evaluate true investment performance. The effect on absolute returns (MOIC/TVPI) is negligible since total cash flows remain the same.
What happens if an LP defaults on a capital call backing a subscription line?
The lender has recourse to the other LPs' unfunded commitments. Banks underwrite subscription lines based on the creditworthiness of the LP base, so funds with institutional-quality LPs get better terms. If enough LPs default to threaten the facility, the lender can demand repayment from the fund, creating a serious liquidity problem for the GP.
How large is a typical subscription line relative to fund size?
Most subscription lines range from 15% to 30% of total fund commitments. Some funds have pushed higher, but LP pushback and ILPA guidance have encouraged moderation. The facility is meant to bridge short-term timing gaps, not serve as permanent leverage. Lenders typically require drawdowns to be repaid within 90 to 180 days through actual capital calls.
