What Is a Security Deposit Alternative (SDA), and Is It Better Than a Cash Deposit?

Security deposit alternatives (commonly abbreviated SDAs) have been one of the fastest-growing product categories in multifamily real estate over the last decade. They promise benefits on both sides of the lease: residents avoid tying up cash at move-in, operators maintain financial protection against damage and unpaid rent.

What most operators do not know is that SDAs also generate significant insurance and bond premium volume. And like every insurance product, that premium volume creates an underwriting profit that goes somewhere. In the traditional model, it goes to the SDA provider or the insurance/bond company. In a captive structure, it comes back to the operator.

The basics: how traditional security deposits work

In the traditional model, a resident pays a security deposit, typically equal to one to two months' rent, at move-in. The operator holds that cash in a designated account, often subject to state-specific requirements around commingling, interest accrual, and return timelines. At move-out, the operator documents any damages, deducts costs from the deposit, and returns the remainder to the resident within a state-mandated timeframe (typically 14–30 days).

The problems with this model are well-documented on both sides. Residents face a significant cash barrier at move-in, often $1,500–$3,000 due at signing in addition to first month's rent. Operators face administrative complexity, state compliance requirements, and the reality that cash deposits frequently do not cover actual damages, particularly for longer-tenancy residents who may have caused wear-and-tear damage that accumulates beyond the deposit amount.

How security deposit alternatives work

An SDA replaces the cash deposit with a small monthly fee (typically $25–$30 per month) that gives the operator similar or better financial protection against damages and unpaid rent. The resident does not pay a lump sum at move-in. Instead, they pay a manageable monthly fee that is charged through the lease ledger, similar to how resident liability coverage is charged.

The coverage provided to the operator typically includes protection against physical damage beyond normal wear and tear up to a defined limit, and in some programs, unpaid rent protection as well.

Who actually provides the coverage, and why that matters

This is where the economics diverge significantly, and where most operators are leaving money on the table.

In the most common SDA programs on the market (companies like Jetty, Rhino, and similar providers) a third-party insurer or bond company underwrites the coverage and collects the premiums. The SDA company earns a broker fee or revenue share. And the operator earns a small an administrative fee in some programs. Then insurer or bond company captures any underwriting profit.

The loss ratios on SDA programs are favorable, damage claims beyond the deposit amount are relatively uncommon in professionally managed portfolios. This means the underwriting profit on SDA premiums is significant, and in the traditional model, operators do not see any of it.

The captive SDA model

In a captive structure, the SDA product operates within an operator-owned insurance cell. Residents pay the same monthly fee. Coverage is identical. But the premium flows into a structure the operator co-owns, and the underwriting profit distributes back to the ownership group at year end instead of a third-party insurer/bond company.

The practical difference: on a 300-unit property at 85% occupancy with SDAs charging $25 per month per resident: 255 residents × $25 × 12 = $76,500 in annual SDA premium. At a 20% loss ratio (accounting for occasional damage claims), approximately $61,200 is available as underwriting profit. Under a traditional SDA product, the SDA company and their insurance carrier capture that amount. Under a captive structure, the owner or operator would keep it.

Is an SDA better than a cash deposit for operators?

The honest answer is: it depends on how the SDA is structured, and what happens to the underwriting profit.

A traditional SDA from a third-party provider offers operational benefits: no deposit holding requirements, better resident experience at move-in, potentially better coverage than a capped cash deposit, etc. But it transfers the underwriting economics to an outside party. The operator is essentially providing their resident base as the distribution channel for someone else's product (and profit).

A captive SDA program offers all the same operational benefits, plus the back-end underwriting economics. The resident experience is identical. The operator experience is better because the premium volume generates profit returns rather than profits just flowing out.

Resident experience and adoption

The resident value proposition of SDAs is strong. Eliminating a $1,500–$3,000 cash barrier at move-in meaningfully reduces friction in the leasing process and expands the effective applicant pool — particularly for younger renters and those in high-cost markets where move-in costs represent a significant financial strain.

Adoption rates in properties that offer SDAs as the default option with a clear opt-out path are typically 75–90%. Residents who prefer to pay a traditional cash deposit can still do so, but the SDA becomes the preferred option via the path of least resistance and convenience.