For US commercial tenants and franchisees · Runs in your browser · Your lease is never uploaded · No account, no charge给美国商业租户与加盟商 · 全部在浏览器内运行 · 租约绝不上传 · 无需注册、不收费

Your lease already says what you owe. Redo the arithmetic.该付多少，你的租约早就写好了。把这笔账重算一遍。

Both documents are in your drawer. Nobody has ever made them argue with each other. Type what each one says into the same row and the difference computes itself.两份文件都在你抽屉里，只是从来没让它们对质过。把两边各自的说法填进同一行，差额自己就出来了。

$8,566

The gap in a worked example — what this tenant was billed, against what their own pro-rata share of the same expense pool comes to.一个算例中的差额——房东实际向该租户收的钱，与按同一笔费用池算出的他自己那份之间的差。

Premises
承租面积: 3,200 sf
Building
整栋面积: 84,000 sf
Expense pool
费用池: $612,000
Billed to them
向他收取: $31,880

A gap is not proof of an overcharge. It means one of the two documents is not saying what the other says, and your lease decides which. This page never claims to know your lease — you type what it says.有差额不等于被多收了。它只说明两份文件对不上，而以哪一份为准由你的租约决定。本页从不假装知道你的租约写了什么——那是由你填进来的。

The recheck复算

Left column comes off your lease. Middle column comes off the statement and your own payment records. The right column is arithmetic — it recomputes as you type, and it shows nothing at all until it has the numbers it needs.左栏抄自你的租约，中栏抄自对账单和你自己的付款记录，右栏是算出来的——边填边算，缺数字时它什么都不显示。

Free · nothing is uploaded · no account required免费 · 不上传任何内容 · 无需注册

Enter figures only. Do not paste your lease, the landlord's letter, or anything with names or account numbers in it — this tool does not need them and does not want them.只填数字。不要把租约、房东来信，或任何含姓名、账号的内容贴进来——本工具不需要，也不想要。

The check

检查项

From your lease

抄自租约

From the statement

抄自对账单

The gap

差额

Pro-rata share按面积分摊比例 Your rentable SF over the building's, applied to the pool. Check your clause for the denominator — retail leases often exclude anchor GLA from it.你的可出租面积占整栋的比例，乘以费用池。分母以你的条款为准——零售租约常把主力店面积排除在外。

Premises rentable sf承租可出租面积

Building sf整栋面积

Total pool $费用池 $

Billed to you $向你收取 $

Needs all four四个都要填

Cap on increases涨幅封顶 Computed three ways, because a 5% cap means three different ceilings.按三种口径各算一遍——同样写 5%，封顶线可以差出三个数。

Cap %封顶百分比

Base-year $基准年金额 $

Years since base距基准年年数

Last year actual $去年实际 $

This year capped items $今年受限项合计 $

Needs the cap and this year's figure要有封顶比例和今年的数

Were your estimates credited?你已付的预估款抵了吗？ You paid monthly all year. The balance should be your share minus that.你按月付了一整年，余额应当是「你的份额减掉已付」。

Monthly estimate $每月预估 $

Months paid已付月数

Balance the statement says you owe $对账单说你还欠 $

Needs the estimate and the balance要有预估款和余额

Time left to object还能提出异议的时间 Your own audit-rights clause sets this. We only subtract dates.时限由你租约里的审计权条款决定，我们只做日期相减。

Notice window (days)异议期（天）

Date you received it收到对账单的日期

Needs the window and the date要有异议期和日期

The line items逐条费用

Paste the whole expense column if you like — a forty-line statement is normal and all of it is read. One name per line. Each is matched against the categories commercial leases most often exclude from a pass-through. A match is not a verdict — it tells you which clause to go and read.整列费用直接贴进来就行——一张四十行的对账单很正常，全部都会读。一行一个名称。每一条会去比对「商业租约最常排除在可分摊费用之外」的类别。命中不是结论，它只告诉你该去翻哪一条条款。

What decides each answer每个答案由什么决定

Why the cap is computed three ways封顶为什么要算三遍

A 5% cap where year two only used 3% lets a cumulative landlord charge 7% in year three; a non-cumulative cap holds at 5%. Compounded is higher again. Most tenants do not know which one they signed, so all three are shown and none is picked for you.同样是 5% 封顶：若第二年只涨了 3%，累计口径下房东第三年可以收 7%，非累计口径只能收 5%，复利口径还要更高。多数租户并不知道自己签的是哪一种，所以三个都摆出来，不替你选。

Lowndes, CAM Expenses: Cumulative versus Non-Cumulative (2022) · checked 2026-08-19

Why the clock matters为什么时限要紧

Audit-rights clauses commonly read: if the tenant fails to dispute within the window, the results are deemed accurate and the right to dispute is waived. Sixty days is common enough to be the sample redline in a law firm's own guidance.审计权条款常见写法是：租户若未在期限内提出异议，对账结果即视为准确，异议权作废。60 天常见到足以成为律所自己范本里的示例条款。

Law Offices of Matthew Johnston, Commercial Leases Examined — Audit Rights · checked 2026-08-19

What the alternative costs另一条路要花多少

A lease-audit firm will do this properly and charge for it: one publishes $250 for the initial review of operating expenses plus a 33% contingency fee on what it recovers. This page is not that service and does not replace it — it tells you whether it is worth calling one.专业租约审计公司会把这件事做扎实，也会收费：某家公开标价「初次运营费用复核 $250，外加追回金额的 33% 分成」。本页不是那种服务，也不替代它——它只帮你判断值不值得打那个电话。

National Lease Advisors, Lease Audit Services · checked 2026-08-19

The one we deliberately do not compute我们故意不算的那一项

Gross-up. If occupancy was low, a landlord may restate variable expenses as if the building were 95–100% full — legitimately, if your lease allows it, and only for variable costs. We cannot see which of your line items are variable, so we flag that a gross-up appears and stop. Guessing here would be inventing your lease.Gross-up（补足计算）。空置率高时，房东可以把可变费用按 95%–100% 满租重述——只要租约允许，而且只能用于可变费用，这本身是正当的。我们看不出你哪些条目是可变的，所以只提示「出现了 gross-up」就停手。在这里猜，等于替你编造租约。

Lowndes, Grossing-Up Operating Expenses in Commercial Leases · checked 2026-08-19

There is nothing to buy here这里没有要卖的东西

This page was built with a $29 saved record on it. The first commercial tenant we put it in front of priced that at nothing, and gave the reason we could not argue with: the arithmetic is already on the screen to copy, and a hash from a website is not an exhibit anybody's managing agent will care about. So it is gone. The record still downloads — it is just free, like the rest of the page.这一页原本挂着一份 $29 的存档。第一个真实商业租户看完给它的定价是零，理由我们没法反驳：算式本来就摆在屏幕上可以照抄，而一个网站给的哈希值，对方的物业代理不会当回事。所以撤掉了。存档照样能下载——只是免费，和这一页其余部分一样。

Free免费

No account, no trial timer, no email wall.不需要账户、没有试用倒计时、不拦邮箱。

Downloads the figures above with today's date and a SHA-256 over them. Fill the recheck in first or the file will be empty.把上面的数字连同今天的日期和一段 SHA-256 一起下载。先把复算填了，否则文件是空的。

What this does not do这一页不做什么

It never reads your lease. Every clause value on this page was typed by you, and if you type it wrong the answer is wrong.它从不读你的租约。页面上每一个条款数值都是你自己填的；填错了，算出来就是错的。
It does not say any charge is an overcharge. It says which clause decides, and hands you the arithmetic to ask with.它不会说哪一笔是多收的。它只指出由哪条条款决定，并把算式交给你去问。
It does not estimate what you would recover, or how likely you are to recover it. Nobody can, and a number here would only be there to make you feel like buying.它不预测你能追回多少、有多大把握追回。没人能算，而在这里放一个数字，唯一的用处就是催你下单。
It does not contact your landlord, file anything, or represent you.它不联系房东、不代你提交任何东西、不代表你。
It is not legal advice, not an accounting opinion, and not a lease audit.它不是法律意见，不是会计意见，也不是租约审计。
A line item it does not recognise is reported as not recognised. It is never quietly dropped and never guessed at.认不出的费用条目会明确标成「未收录」。绝不悄悄丢掉，也绝不猜。

Questions people actually ask真实会被问到的问题

Does my lease or my statement leave the browser?我的租约或对账单会离开浏览器吗？

No. The recheck runs on your device and asks only for figures — never a document, a name or an account number.不会。复算在你的设备上运行，而且只要数字——从不要文件、姓名或账号。

A gap showed up. Does that mean I was overcharged?算出差额了，是不是就等于被多收了？

No. It means the statement and the figures you took from your lease do not agree. Which one governs is a question about your lease, and that is the point at which you read the clause or call someone who reads them for a living.不是。它只说明对账单和你从租约里抄来的数字对不上。以哪一份为准，是你租约的问题——到这一步，你该去翻那条条款，或者找靠这个吃饭的人。

Which cap ceiling is the right one for me?三个封顶线，哪个才是我的？

Whichever your lease says. We cannot tell from the outside, so we compute all three and label them; picking one for you would be guessing at a contract we have never seen.你租约写哪个就是哪个。我们从外面看不出来，所以三个都算、都标注清楚；替你挑一个，等于对一份没见过的合同下判断。

Who runs this?这是谁在运营？

TJ NOVA LTD, registered in England and Wales, company number 17308318.TJ NOVA LTD，于英格兰及威尔士注册，公司编号 17308318。