Gross rent multiplier calculator
Price divided by annual gross rent, solved in any direction. Then the part most GRM pages leave out: the same multiplier translated into the going-in cap rate it implies, at expense loads you can move, so you can see the three points of yield a multiplier is not looking at.
The same multiplier, different buildings
Every row below is the same price and the same gross rent. Only the share of that rent which survives vacancy and expenses changes, and the going-in yield moves three full points across the range. That is the whole case against pricing anything on a multiplier: it cannot see the column that decides the answer.
| Share lost to vacancy and expenses | NOI | Going-in cap rate |
|---|---|---|
| 25% | $750,000 | 7.50% |
| 30% | $700,000 | 7.00% |
| 35% | $650,000 | 6.50% |
| 40%This scenario | $600,000 | 6.00% |
| 45% | $550,000 | 5.50% |
| 50% | $500,000 | 5.00% |
| 55% | $450,000 | 4.50% |
A gross rent multiplier ignores expenses, vacancy, capital structure, lease terms and capital needs completely. Two buildings can trade at the same multiplier and produce completely different net operating income, which is what the table above shows in dollars. Use it to sort a list quickly and to notice an outlier; do not use it to price a building, and never compare one across property types or lease structures.
A multiplier is for sorting a list of listings on a Tuesday morning. The moment one of them is worth an offer, the question becomes what the rent actually nets after vacancy, taxes, insurance, management and reserves, and what debt that income can carry. Altyst reads the offering memorandum, the rent roll and the T-12 and builds that.
One division, read as years
The gross rent multiplier is the purchase price divided by annual gross rent. It is one of the few metrics in real estate whose reading is literal: a multiplier of 10 means the price is ten years of gross rent. Because it is a single identity, knowing any two of price, rent and multiplier gives the third, which is why this page solves in all three directions. What makes it the fastest screen in the business is not the arithmetic, it is the inputs: both numbers are on the first page of any listing, and neither one requires trusting a seller's expense statement.
One thing to settle before quoting one. Commercial listings almost always mean annual rent, so multipliers land in the single digits or low teens. Residential and small multifamily listings often mean monthly rent, so the same building reads twelve times higher, commonly somewhere between 80 and 160. They are the same measure in different units, and the calculator reports both so a number lifted off a listing sheet is never compared against the wrong scale.
A worked example, and the reason to distrust it
Take the figures the calculator loads with: $10,000,000 against $1,000,000 of annual gross rent, a multiplier of exactly 10, which is ten years of gross rent or $10.00 of price for every dollar of it. Now supply the thing the multiplier cannot see. If 40% of that rent disappears into vacancy and operating expenses, net operating income is $600,000 and the going-in cap rate is 6.0%, which is the same property the cap rate calculator and the NOI calculator open on.
- The same 10 multiplier at a 25% load is a 7.5% cap rate. Same price, same rent, $750,000 of NOI instead of $600,000. That is a net-leased building where the tenant pays the recoverable expenses directly.
- The same 10 multiplier at a 55% load is a 4.5% cap rate. Same price, same rent, $450,000 of NOI. That is an older gross-leased property carrying its own utilities, a heavy repair budget and real vacancy.
- Three full points of going-in yield, and the multiplier never moved. A buyer who screened on the multiplier alone would rank those two identically. This is not a subtlety about GRM; it is the whole of what GRM is.
The conversion is exact rather than approximate, which is worth stating because it is usually presented as a rule of thumb. The going-in cap rate is one minus the share of gross rent lost to vacancy and expenses, divided by the multiplier. Both sides divide by the same gross rent, so nothing is lost in the translation.
What a multiplier ignores, in order of how much it costs
Operating expenses first, because they are the largest and the most variable: taxes that reassess on sale, insurance that has repriced hard in coastal and wildfire markets, and utilities that depend entirely on who is billed. Vacancy and credit loss second, because a fully leased building and one at 88% occupancy show identical gross potential rent. Lease structure third, and it can dominate everything else: a triple-net tenant paying taxes, insurance and maintenance directly leaves far more of the gross reaching the owner than a gross lease does, which is why comparing a multiplier across lease types is meaningless rather than merely rough.
Then the things no income metric sees. Capital needs, because a roof at the end of its life and a new one produce the same rent. Lease rollover, because a building with every lease expiring in eighteen months and one with ten years of weighted average term look the same on this page. And capital structure, which a multiplier ignores for the same good reason a cap rate does: it is a property measure, and how it is financed is the buyer's question, answered by the DSCR and cash-on-cash tools.
When to use it anyway
The glossary entry works the same point through two properties at an identical 10.0 multiplier whose cap rates land 124 basis points apart, which prices the second one $2.0 million below the first. It earns its place in exactly three situations. Sorting a long list of listings quickly, when the alternative is reading twenty expense statements to eliminate eighteen deals. Comparing near-identical buildings in one submarket with the same lease structure and roughly the same age, where the things the multiplier ignores are genuinely similar across the set. And spotting an outlier: a multiplier well off its neighbors is a question worth asking, and the answer is occasionally an opportunity and usually a problem the seller already knows about. In all three the multiplier is doing triage, not valuation, and that is the honest job description.
What this page does not do
It does not tell you what multiplier your market pays, because that moves by submarket, asset class and quarter, and a static page asserting one would be stale the week it shipped. It does not know whether the gross rent you typed includes other income, which is why it asks you to say so. And it is not advice: it is arithmetic on the figures you typed, stated with the conventions it uses, and nothing more. The moment a screen turns into an offer, the work is the expense stack, and that is the NOI calculator and, past it, a real model.
Questions
What is the gross rent multiplier?
The purchase price divided by annual gross rent. It reads literally as years: a multiplier of 10 means the price is ten years of gross rent, before a single dollar of vacancy, expense or debt is considered. It is the fastest screen in real estate because it needs only two numbers, both of which are on the first page of any listing.
How do you calculate GRM?
Divide the price by the annual gross rent. A $10,000,000 property with $1,000,000 of scheduled annual rent has a GRM of 10. The same identity rearranges two other ways: the price a multiplier implies is the multiplier times the rent, and the rent a price implies is the price divided by the multiplier. This calculator solves whichever of the three you leave blank.
Is GRM monthly or annual?
Both are used, which is exactly the problem. Commercial listings usually mean annual gross rent, so the multiplier lands somewhere in the single digits or low teens. Residential and small multifamily listings often mean monthly rent, so the same building shows a multiplier twelve times larger, commonly between 80 and 160. The two are the same measure in different units, and this calculator reports both so a number copied off a listing sheet cannot be compared to the wrong one.
What is a good gross rent multiplier?
There is no answer that survives the next question, which is what the expenses are. A multiplier is a price per dollar of gross rent, and gross rent is not income. Two buildings at the same multiplier can differ by three full points of going-in yield depending on whether the tenant or the landlord pays the expenses, which is what the table on this page shows in dollars. A low multiplier is a reason to look, not a reason to buy.
What is the difference between GRM and cap rate?
The denominator. A cap rate divides net operating income by price; a multiplier divides price by gross rent. The cap rate has already answered the expense question and the vacancy question, and the multiplier has not asked either. That makes the multiplier faster and the cap rate meaningful. The two are related exactly: the going-in cap rate equals one minus the share of gross rent lost to vacancy and expenses, divided by the multiplier.
Can you convert GRM to a cap rate?
Only if you supply the piece the multiplier is missing. Given the share of gross rent that does not reach net operating income, the conversion is exact: cap rate equals one minus that share divided by the multiplier. A 10 multiplier at a 40% load is a 6.0% cap rate; the same 10 multiplier at a 25% load is 7.5%. The conversion is arithmetic, but the input it needs is the entire thing a multiplier was avoiding.
Does gross rent include other income?
Sometimes, and the market does not agree, which is a real hazard rather than a quibble. Some quotes use scheduled rent alone, some use rent plus parking, storage and fees, and a few use effective gross income after vacancy, which is a different measure again. On a property where other income is ten percent of revenue, the choice moves the multiplier by roughly a point. State which gross you used, and never compare a multiplier to one whose basis you do not know.
When is a GRM actually useful?
When you are sorting a list, when you are comparing near-identical buildings in one submarket with the same lease structure, and when you want to notice an outlier worth investigating. It is genuinely good at all three. It is not useful across property types, across lease structures, across markets with different tax regimes, or on any building whose expenses are unusual, which describes most of the ones worth buying.
Can I put this calculator on my own website?
Yes, and it takes one line of HTML. There is no account and no key to request, so nothing can expire and break your page a year from now. The framed version loads no advertising script, ours or anyone else's, and sets no cookie on your readers. Keep the credit line under it and it is yours to use, including on a commercial site. The code is on the embed page.
Do you store what I type?
Not the figures. The math runs in your browser, nothing you type is sent to us, and there is no account or email field. Your scenario is written into the page address so you can bookmark it or send it to a partner, which does mean a link you share carries your figures with it. The page does carry the site's normal cookies, which the cookie notice lists; the embeddable version carries none.
A screen is not an underwriting
When a listing survives the multiplier, the next question is what the rent nets after vacancy, taxes, insurance, management and reserves, and what debt that income carries. Altyst reads the offering memorandum, the rent roll and the T-12 and answers it.