Quick answer: “Cosigners” and “guarantors” are mostly interchangeable terms that refer to any party — either an individual for free or an insurance company for hire — who agrees to legally back a renter’s lease. These can work well to protect your bottom line, but collection is often difficult in practice, and companies are incentivized to limit payouts.
OneApp is different. As a partner in your portfolio, we’re incentivized to help you avoid defaults and help renters succeed with end-to-end support. In the rare event a default occurs, we pay our promise in full, on time, every time.
When Applicants Narrowly Miss Your Criteria: Understanding Your Options
Every month, properties deny applicants who could very likely succeed, simply because they fall short on credit, income, or rental history.
There’s a growing category of lease guarantor and cosigner companies that position themselves as the solution to this problem for property managers and landlords.
To help you navigate these choices, we’ve put together a quick and candid guide of the various solutions available to you, the pros and cons of each, and how they compare in practice.
Option 1: Personal cosigners or guarantors
Option 2: Lease guarantor / cosigner insurance companies
Option 3: Lease support through OneApp Partnership
Whether you manage a large portfolio or self-manage as an individual landlord, this guide is for you.
🏢 Renting an apartment instead of managing one? Here’s the renter’s guide to comparing these options instead.
Key Takeaways
- Properties can approve more borderline applicants without changing screening criteria in a few different ways.
- A cosigner or guarantor role can be played by an individual or an insurance company who agrees to legally back a renter’s lease.
- Collection from individuals after a default often requires legal effort with no guarantee of success
- Similarly, insurance-backed cosigner or guarantor companies typically profit by limiting payouts, so coverage is often capped to missed rent unless the applicant pays for additional protection.
- OneApp Partnership is incentivized differently. It’s free to the property, provides active support throughout the lease term, and reimburses consistently up to 3x base rent for rent, damages, and legal fees within 10 business days.
What Narrow-Miss Denials Actually Cost You
Before comparing tools, it helps to see the real cost of doing nothing.
Denials cost you more than an awkward email. They also cost you real time and revenue every day a unit sits empty. Most properties land somewhere between $1000 – $1,500 per denial. If traditional screening denies even just a handful of applicants a month, this could easily hit $80K a year or more.
Here’s a simple framework to calculate your own portfolio’s true denial cost:
Lost Rent + Acquisition Spend = Cost of Denial
Multiply that by the annual number of denials, and you’ll get a clearer picture of what this is costing your property each year.
The upside is real too. Integral Property Management generated $250,000 in revenue within six months of adopting OneApp Approval Assist, proof that approval optimization, not blanket approval, is where the real financial opportunity lives.
Option 1 | Requiring a Personal Cosigner or Guarantor
Some properties only require applicants who don’t meet standard criteria to bring a personal cosigner or guarantor. This is usually a parent, family member, or close friend who agrees to take on responsibility for the lease if the applicant can’t pay.
These terms are largely interchangeable, with one key difference: a cosigner actually signs the lease and has access to the property. A guarantor doesn’t.
- How it works: The applicant finds someone to cosign, that person is screened alongside the applicant, and both are held responsible for the lease if approved
- Cost to the property: None directly
- Coverage: Full lease responsibility, but only if the property successfully pursues the cosigner after a default
- Approval speed: Depends entirely on the cosigner’s own paperwork and screening
- Ongoing support: None; this is a one-time screening decision, not an ongoing service
| Pros of Requiring a Personal Cosigner or Guarantor: | Cons of Requiring a Personal Cosigner or Guarantor: |
|---|---|
| ✅ No direct cost or new vendor relationship | ❌ Slows down leasing, since the applicant needs time to find and submit a qualified cosigner |
| ✅ Keeps the process fully in-house | ❌ Shrinks your approvable pool, since not every applicant has someone available who qualifies |
| ❌ No reimbursement mechanism; if the cosigner doesn’t pay, your team has to pursue them directly | |
| ❌ Doesn’t scale consistently across a portfolio, since each case is handled manually |
Option 2 | Lease Guarantor / Cosigner Insurance Companies
Instead of relying on a personal connection, an applicant can pay an insurance-backed company to act as their cosigner or guarantor.
These companies serve both landlords and property managers, and may call themselves a guarantor service or a cosigning service. But most work the same way: they review the applicant’s credit, income, and rental history, then back the lease with your property for a fee, typically paid by the applicant based on their risk profile.
- How it works: The company underwrites the applicant, and issues a guarantee to your property
- Cost to the property: Usually free
- Cost to the applicant: Typically based on their credit and income profile, commonly cited in the range of 4% to 10% of annual rent
- Coverage: Often limited to missed rent by default, though some tiers go up higher for an added fee; protection for damages or legal fees is frequently a separate, additional purchase
- Reimbursement speed: Heavily depends on documentation and often requires a lengthy back-and-forth between properties and insurers
- Approval speed: Often same-day
| Pros of a Paid Cosigner or Guarantor Company: | Cons of a Paid Cosigner or Guarantor Company: |
|---|---|
| ✅ Often free to adopt for the property | ❌ Coverage may be capped to rent only unless the applicant purchases additional protection, potentially leaving damages or legal fees unprotected |
| ✅ Can convert more denied applicants without changing your criteria | ❌ Claims processes can involve manual documentation, and some applicants and properties report friction over itemized claim disputes |
| ✅ Fast approval decisions in most cases | ❌ Applicant-side pricing varies case by case, which can slow down or stall conversion at the moment of approval |
| ❌ Support is typically limited to the claims process; there’s little to no active involvement in helping the applicant succeed through the lease |
Option 3 | OneApp Partnership
OneApp Partnership works differently.
Applicants who don’t meet your standard criteria can be referred to OneApp Approval Assist. If eligible, they move forward with OneApp’s lease support behind them, and your criteria never has to change.
- How it works: OneApp reviews the applicant, then backs the lease if eligible. If a default happens, OneApp reimburses the property directly
- Cost to the property: Free, no setup fees, no minimum usage requirements
- Cost to the applicant: A flat fee equal to one month’s rent*, regardless of their credit profile, with payment plans available at most properties.
- Coverage: Rent, damages, and legal fees together, up to 3x base rent across the board, with no separate tiers to purchase
- Reimbursement speed: Within 10 business days of receiving documentation, no lengthy back-and-forth required
- Approval speed: Instant
- Ongoing support: Active renter support and portfolio stabilization consulting throughout the lease, aimed at preventing defaults rather than only paying out after they happen
*For leases longer than 13 months, the fee will be prorated to account for the longer term of coverage.
💡 Curious how OneApp Partnership could stabilize your portfolio and improve your occupancy? Schedule a demo today.
| Pros of OneApp Partnership: | Cons of OneApp Partnership: |
|---|---|
| ✅ No cost to the property | ❌ Some alternatives promise higher payouts, but that comes bundled with steeper applicant fees or added underwriting. With OneApp Partnership, reimbursement holds at 3x base rent, applied consistently across every lease. |
| ✅ Reimbursement covers rent, damages, and legal fees together, with no upsell tiers | |
| ✅ Consistent flat fee for applicants, which can reduce hesitation at the point of approval | |
| ✅ Active support during the lease term, not just a claims process after the fact | |
| ✅ No long-term contract or minimum usage requirements |
Compare Your Options
Here’s how all three stack up side by side on the details that typically matter most to a property.
| Personal Cosigner or Guarantor | Paid Cosigner or Guarantor Company | OneApp Partnership | |
|---|---|---|---|
| Cost to the property | Free | Free | Free |
| Cost to the applicant | None directly | Often based on credit and income | Flat: one month’s rent |
| What’s covered | Full lease responsibility, if pursued successfully | Often rent only by default; some additional coverage for an added fee | Rent, damages, and legal fees together, up to 3x base rent across the board |
| Reimbursement speed | N/A, requires pursuing that person directly | Heavily depends on documentation and often requires a lengthy workflow | Within 10 business days or less |
| Approval speed | Depends on their paperwork | Often same-day | Instant |
| Ongoing support during the lease | None | Typically none after approval | Active default-avoidance support |
| Contract or minimum commitment | N/A | Varies by provider | None |
| Optimized for: | Zero-cost approvals when a backer is available | Properties with capacity to manage the extra paperwork and pricing variability, who prioritize high-tier coverage | Properties that want maximum predictability and ease, with a flat fee, fast reimbursement, and ongoing support built in |
Cosigners, Guarantors, or OneApp Partnership: What Actually Protects Your Bottom Line
Requiring a personal cosigner or guarantor keeps things simple and free to everyone, but it can slow down leasing and doesn’t scale well across a portfolio.
A paid cosigner or guarantor company converts more applicants without a direct cost to the property, though coverage is often conditional and highly variable, and applicant-side pricing can be inconsistent enough to stall conversion.
OneApp Partnership removes both constraints: no cost to the property, consistent reimbursement that covers rent, damages, and legal fees together, fixed low renter fee that streamlines conversion, and active support built to help prevent defaults rather than only pay out after they happen.
Frequently Asked Questions
Nothing. There are no setup fees, no minimum referral quotas, and no per-unit charges. Applicants pay the service fee, not the property.
Within 10 business days of receiving documentation for a qualifying loss.
No. Your existing criteria stays exactly as is. OneApp works alongside your standards, not around them.
No. It’s a lease support service, not an insurance product, which is why there’s no tiered claims process or separate coverage add-ons.
Often the same day. Once your team signs the participation agreement and completes a short onboarding call, you can begin referring applicants right away.