What Is Net Operating Income (NOI) for Rental Property?

Ask most landlords in Dhaka how much their building earns and they will tell you the total rent: "twelve flats at around Tk 25,000, so about Tk 3 lakh a month." That number is useful, but it is not what the building actually earns. After the caretaker's salary, lift maintenance, common electricity, holding tax, repairs and a couple of empty months, the real figure can be a lot lower. The measure that captures this properly is Net Operating Income (NOI).

This glossary entry explains what net operating income means for rental property in Bangladesh, what goes into it and what stays out, how to calculate it step by step with a worked example, how it connects to rental yield and property value, and the mistakes owners commonly make. It is written for owners of flats, family buildings, shops and small markets, including probashi owners who manage property from abroad and want one honest number to track.

Net Operating Income: The Simple Definition

Net Operating Income (NOI) is the income a rental property produces from its operations in a period (usually a year) after deducting the costs of running it, but before loan repayments, income tax and big one-off capital spending.

NOI = Effective rental income + Other property income − Operating expenses

Think of NOI as the answer to: "If I owned this building outright with no bank loan, how much would its day-to-day operation put in my pocket each year before income tax?" Because it ignores how the property is financed, NOI lets you compare two buildings fairly — one bought with cash, one with a home loan — and track whether your own building is being run better or worse from year to year.

The Building Blocks of NOI

1. Gross potential rent

This is the rent you would collect if every flat, shop or office were let for the whole year at the current agreed rent. For example, 10 flats at Tk 20,000 each = Tk 2,00,000 a month, or Tk 24,00,000 a year.

2. Vacancy and collection loss

No building is 100% let 100% of the time. Flats stand empty between tenants, and some rent is never collected. Subtract both. If one flat was empty for three months, that is Tk 60,000 of lost rent. If a tenant left owing a month you could not recover from the deposit, that is a collection loss. Our glossary entry on vacancy rate explains how to measure the first part.

3. Other property income

Many buildings earn more than rent: parking fees, rooftop telecom tower or billboard rent, service charge surplus, laundry or storage space. Include regular, operational income here. A one-off salami (position money) on a shop lease is better tracked separately because it does not recur every year.

4. Operating expenses

These are the recurring costs of keeping the property running and lettable. In Bangladesh they typically include:

• Caretaker, guard, cleaner and liftman salaries and festival bonuses
• Common area electricity (stairs, lift, pump, security lights) and generator fuel
• Lift and generator maintenance contracts
• WASA water for common use, pump repairs, tank cleaning
• Holding tax and other municipal charges paid by the owner
• Routine repairs and maintenance: plumbing, electrical, painting of common areas
• Insurance, if you have any
• Property management fees or a manager's salary
• Rent collection costs: SMS, bank or mobile wallet charges, software subscription

Where tenants pay a service charge that covers some of these costs, you can either record the service charge as income and the costs as expenses, or net them off — just be consistent.

What Is NOT Included in NOI

This is where most confusion happens. The following are deliberately left out:

Leaving these out does not mean they are unimportant. You will still need to know your cash flow after loan payments and tax. NOI is simply the clean operating figure you start from.

How to Calculate NOI Step by Step

1. List every unit with its current monthly rent and multiply by 12 to get gross potential rent.
2. Subtract rent lost to vacancies (months empty × rent).
3. Subtract rent you could not collect (bad debts).
4. Add regular other income (parking, rooftop, service charge if recorded as income).
5. This gives effective gross income.
6. Add up all operating expenses for the same 12 months.
7. Subtract operating expenses from effective gross income. The result is NOI.

Worked Example: NOI for a Six-Storey Building

For example (illustrative): An owner in Mohammadpur has a building with 10 rented flats at Tk 22,000 per month each, plus 4 car parking spaces rented at Tk 3,000 each per month. During the year, two flats stood empty for 2 months each, and one tenant left owing Tk 22,000 that could not be recovered after the deposit adjustment.

So although the "headline" rent was Tk 26.4 lakh, the building's NOI is about Tk 19.44 lakh — roughly 74% of effective gross income. The ratio of operating expenses to effective gross income (7,30,000 ÷ 26,74,000 ≈ 27%) is called the operating expense ratio, and tracking it year to year shows whether costs are creeping up.

NOI, Rental Yield and Property Value

NOI becomes really useful when you connect it to the value of the property.

Net yield (cap rate)

Dividing NOI by the property's value (or purchase price) gives the net yield, often called the capitalisation rate or cap rate internationally:

Net yield = NOI ÷ Property value × 100

For example (illustrative): if the building above were valued at Tk 6 crore, the net yield would be 19,44,000 ÷ 6,00,00,000 × 100 ≈ 3.24%. The gross yield using headline rent would be 26,40,000 ÷ 6,00,00,000 × 100 = 4.4%. The gap between the two shows how much running costs and vacancies eat into returns.

For a fuller comparison of yield and appreciation, see rental yield vs capital gain.

Why buyers and banks care

When you sell a commercial property or seek finance against it, a serious buyer or lender will want to see a credible income and expense record. A property with steady, documented NOI is easier to value and negotiate than one where the owner can only quote gross rent from memory. This is general educational information, not investment or valuation advice — professional valuers use their own methods and local comparables.

NOI vs Cash Flow vs Profit

Note that NOI is a management and investment measure, not a tax figure. How rental income and allowable deductions are treated for income tax under the Income Tax Act, 2023 is a separate question; please confirm with a tax lawyer or the NBR rather than assuming your NOI equals your taxable income.

How to Improve Your NOI

There are only two levers: raise effective income, or reduce operating costs without harming the property.

Raise effective income

• Cut vacancy time. Start marketing a flat as soon as notice is given, not after the tenant leaves.
• Reduce collection loss. Clear due dates, reminders and a firm but polite follow-up process reduce unpaid rent.
• Review rents fairly. Rent that has not been reviewed for years may be well below market; increases should follow the agreement and the law.
• Use idle space. Parking, rooftop, storage or a small shop at ground level can add regular income.

Control operating costs

• Switch common-area lighting to LED and put stair lights on timers or motion sensors.
• Service the pump, lift and generator on schedule — breakdowns cost more than maintenance.
• Get two or three quotes for repairs above a set amount.
• Review staffing and duties rather than cutting wages; fair pay keeps good caretakers.

NOI for Different Types of Property in Bangladesh

The formula never changes, but what drives NOI is quite different depending on what you own.

Residential flats and family buildings

For a typical four- to ten-storey residential building, the biggest swing factors are vacancy between tenants and staff costs. Many family buildings have one or two floors occupied by the owner's own family; do not count those as vacant. Either leave them out of the calculation entirely or, if you want to know what the whole building could earn, show a notional rent separately so you do not mix it with real cash. Shared costs such as the caretaker's salary should then be split sensibly between the let part and the family part.

Shops and small markets

In markets and shopping arcades, service charge, common electricity, security and cleaning are larger, and rent collection is often more uneven because business income is seasonal (Eid, Puja and wedding season can matter a lot). Record service charge collected and common costs spent separately so you can see whether the service charge actually covers them. A shortfall there quietly reduces NOI every month.

Mixed-use buildings

A building with shops on the ground floor and flats above should ideally have two mini-statements: one for the commercial part and one for the residential part. That way you can see which part carries its weight. Often the shops produce a higher NOI per square foot but also carry more vacancy risk.

Probashi (non-resident) owners

If a relative or manager runs the building for you, NOI is the cleanest number to ask for each year. Ask for the rent roll, a list of rent actually received, and an expense list with receipts for larger items. Comparing NOI year to year makes it easy to spot a sudden jump in "repairs" or an unexplained fall in collected rent, without accusing anyone — you are just reading the numbers together.

A Simple Monthly NOI Tracker

You do not need to wait for year end. A one-page monthly summary with the following lines is enough:

1. Rent billed this month (all units)
2. Rent actually collected this month
3. Arrears carried forward
4. Other income (parking, rooftop, etc.)
5. Operating expenses by category (staff, utilities, repairs, taxes, other)
6. Monthly NOI = collected rent + other income − operating expenses

Add the twelve monthly figures and you have your annual NOI, with the added benefit that you can see seasonal patterns — for example, generator fuel spiking in summer load-shedding months, or arrears building up before Eid.

Common Mistakes When Calculating NOI

• Using headline rent instead of collected rent. Vacancies and unpaid rent are real; ignoring them overstates NOI.
• Subtracting loan instalments. This mixes financing with operations and makes comparisons meaningless.
• Counting security deposits as income. Deposits must be returned; they are not earnings.
• Forgetting "invisible" costs. Eid bonuses, generator diesel during load-shedding, tank cleaning and small repairs add up.
• Treating a new lift as an operating expense. A major replacement is capital spending. Keep it separate, or one bad year will distort your trend.
• No records. Without an income and expense ledger, NOI is a guess.

Keeping the Records You Need

To calculate NOI with confidence you need three simple records: a rent roll showing each unit's rent and occupancy, a monthly record of rent actually collected, and a categorised expense record. Many owners start with a notebook or Excel; that works if it is kept up to date every month. Our guide to rental property accounting basics shows how to set up categories that make NOI easy to pull out at year end.

Final Thoughts

Net operating income is the most honest single number for a rental property: what the building earns from operations after running costs, before loans and tax. Calculate it once a year, compare it with the year before and with the property's value, and you will quickly see whether rising rents are being swallowed by rising costs or long vacancies.

If you would rather not rebuild the numbers every year, Bariwala ERP (বাড়িওয়ালা ERP) records rent collected per unit, tracks dues and vacant units, and keeps an income and expense account with reports — the raw material for NOI is then available whenever you need it.