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Good guy guarantee in NYC commercial leases

Most small and mid-sized companies in New York City lease space through an LLC or a corporation with few assets of its own. Landlords know that, so before they sign they usually ask a person to stand behind the lease: the owner, a principal or a parent company. In New York that personal backing very often takes the form of a good guy guarantee (also spelled guaranty, and sometimes called a good guy clause).

A good guy guarantee is a limited personal guaranty. The guarantor covers the tenant's rent and other charges while the tenant is in the space, and stops being liable for future rent once the tenant gives proper notice, pays what it owes through the day it leaves, and hands back the space empty with the keys. This guide explains how that exit works, what to negotiate as a tenant, guarantor or landlord, and what changed in 2025. It is general information, not legal advice: have a New York real estate attorney read any guaranty before you sign it.

Why landlords ask for one

Three facts about New York commercial leasing make the good guy guarantee useful to both sides.

  • The tenant entity may have nothing to collect from. If an LLC with no assets stops paying, a judgment against it is worth little. A guaranty gives the landlord a person to pursue.
  • A commercial landlord in New York generally has no duty to mitigate. Under Holy Properties v. Kenneth Cole Productions (Court of Appeals, 1995), a landlord whose commercial tenant walks out early does not have to relet the space to reduce what the tenant owes, unless the lease says otherwise. The 2019 rent laws added a duty to mitigate for residential leases only. So a full guarantor of a commercial lease can owe rent for the whole remaining term.
  • Getting a space back takes time. A tenant that stops paying but stays put can occupy the space for months while the landlord goes to court, and the landlord cannot show it to anyone else in the meantime.

The good guy guarantee trades the first two risks against the third. The landlord gives up its claim against the guarantor for rent after the tenant leaves. In return it gets an incentive for a struggling tenant to leave quickly, on notice and in clean condition, instead of fighting an eviction.

Full guaranty or good guy guarantee?

Full guaranty Good guy guarantee
What it covers Every obligation under the lease Rent and charges while the tenant is in the space
When it ends When the lease ends, unless it burns off earlier Once the tenant gives notice, pays up and hands back the space
Guarantor's exposure if the business fails in year 4 of 10 Up to six years of rent, plus escalations and legal fees The rent through the surrender date, plus any arrears
Who still owes the rest of the lease The tenant and the guarantor The tenant entity alone

That last row matters. A good guy guarantee releases the guarantor, not the tenant. The landlord can still sue the tenant company for the rest of the term, which is one reason landlords accept the arrangement for tenants with modest balance sheets.

How the exit works

The exact conditions are in the guaranty, and they differ from deal to deal. A typical good guy release requires the tenant to:

  1. Give written notice of the date it will leave, a set number of days in advance and in the form the lease's notice clause requires. Anything from 30 days to six months turns up in practice.
  2. Pay rent and additional rent through the surrender date. Additional rent usually means your share of operating expense and real estate tax increases, electricity and other charges billed under the lease.
  3. Vacate completely, leaving the space broom clean and free of the tenant's property, and free of any subtenants or other occupants.
  4. Deliver the keys and any access cards to the landlord.

Once all of that is done, the guarantor is no longer liable for rent that comes due later. Miss one step, such as sending notice to the wrong address or leaving equipment behind, and the release may never take effect, leaving the guarantor liable as if it were a full guaranty.

A worked example

Round numbers, for illustration:

  • A company leases 2,500 SF at $72 per SF, which is $180,000 a year or $15,000 a month, on a ten-year lease.
  • Four years in, the business slows down. Six years remain: 72 months of rent, or $1,080,000 before any escalations.
  • With a full guaranty, the guarantor can be pursued for that remaining rent, plus legal fees, less only what the landlord actually collects from a new tenant. The landlord does not have to look for one.
  • With a good guy guarantee and 90 days' notice, the guarantor's exposure is the rent through the surrender date: three months, or $45,000, if the rent is current. If the tenant was already two months behind when it gave notice, add $30,000 of arrears, for $75,000.

The commercial rent calculator converts a quoted rent per square foot into monthly and yearly figures, so you can work out your own exposure.

The 2025 Court of Appeals ruling on surrender

One question kept coming up: does the guarantor's liability end when the tenant leaves and hands back the keys, or only when the landlord accepts the surrender? Some landlords simply refused to accept and argued that the guarantor stayed liable, and some courts agreed with them, including both lower courts in the case below.

On October 21, 2025, in 1995 CAM LLC v. West Side Advisors, LLC, the Court of Appeals, New York's highest court, answered it. The guaranty in that case limited the guarantor's liability to the date the tenant had completely vacated and surrendered the premises, with 30 days' notice. The tenant gave notice, moved out and returned the keys; the landlord would not accept the surrender and sued the guarantor for the rent that followed. The court held that the guarantor's liability ended when the tenant vacated and surrendered. Landlord acceptance was not a condition, because the guaranty did not make it one.

Two practical lessons:

  • The guaranty's own words decide. If a guaranty does require the landlord's written acceptance, that condition applies. Guarantors should look for it and push back on it. Landlords who want it now know they have to say so in the guaranty itself.
  • Document the surrender anyway. Keep the notice and its proof of delivery, photographs of the empty space and a written receipt for the keys. Ask the landlord to sign a surrender agreement if it will.

What to negotiate as the tenant or guarantor

  • The notice period. Shorter is cheaper for the guarantor, because the rent keeps running during it.
  • What "current" means. Limit the condition to rent billed through the surrender date. Year-end escalation statements often arrive months later, so agree whether the guarantor owes them and for which period.
  • Free rent clawback. Leases often take back free rent or other concessions if the tenant defaults. Make sure leaving under the good guy terms does not trigger that clawback against the guarantor.
  • Objective conditions. Broom clean, keys delivered and no occupants are things you can prove. "To the landlord's satisfaction" and "accepted by the landlord" are not.
  • The guaranty controls. Ask for a clause saying the guaranty's terms win if the lease conflicts with them, and keep the release conditions inside the guaranty.
  • A cap or a burn-off. Some guaranties stop growing after a set number of months' rent, or expire entirely after a few years of on-time payment.
  • Release on assignment or sale. If the business is sold or the lease is assigned and the new tenant provides its own guaranty, the original guarantor should be released.
  • More than one guarantor. Co-guarantors are usually liable jointly and severally, meaning the landlord can collect the whole amount from any one of them.

What landlords look for

Landlords negotiate the same document from the other side:

  • Enough notice to remarket the space, often paired with a security deposit or letter of credit that the landlord keeps if the tenant leaves early.
  • No release while a default continues. The guarantor is released only if everything owed through the surrender date is paid.
  • Clear condition standards for the space at surrender.
  • Acceptance language, now that the Court of Appeals has said it must appear in the guaranty to count.
  • Reinstatement. If a payment the tenant made is later clawed back in its bankruptcy, the guaranty revives for that amount. A tenant's bankruptcy filing generally does not protect its guarantor.

Common traps

  • Notice sent the wrong way. The lease's notice clause usually names addresses, methods such as certified mail or overnight courier, and people who must get copies. Follow it to the letter.
  • A subtenant still in the space. The space is not vacant while a subtenant occupies it, so a sublease can block the guarantor's release. Read the guide to subleasing office space before you sublet.
  • Staying a few extra days. Holding over past the surrender date can carry steep holdover rent, and the guarantor may owe it.
  • Leaving furniture, cabling or fixtures when the lease requires their removal, so the space is not surrendered in the required condition.
  • Assuming the company is free too. The tenant entity still owes the rest of the lease.

Next steps

Where to look

The 6 neighborhoods Leasemark covers with the most office floor area, per NYC PLUTO tax lot data (26v2).

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