How to calculate office yield: formulas, payback and actual cash flow

Calculating an office return requires more than dividing annual rent by the purchase price. Include vacancy, rent-free periods, owner expenses, taxes, insurance, management, repairs, fit-out and other initial investment.

For an initial estimate, use:

Net yield = annual cash flow after expenses ÷ total investment × 100%.

A listing may advertise an attractive yield by dividing contractual rent by the office price. After fit-out, vacancy and owner expenses, the actual return may be materially lower.

An investor therefore needs several measures, not one figure:

• gross yield;
• net operating income;
• capitalisation rate;
• return on invested capital;
• payback period;
• cash flow after debt service.

Below we explain each measure, work through an illustrative model and show how to compare offices consistently.

All examples are illustrative and explain methodology only. This is not personalised investment advice. Taxes and transaction structure depend on the owner and require separate calculation.

In brief: how to calculate an office return

A first estimate can be made in four steps:

1. Add the purchase price and all initial investment.
2. Estimate potential annual income.
3. Deduct vacancy and owner expenses.
4. Divide the resulting cash flow by total investment.

Simplified formula:

Yield = (rental income − vacancy − owner expenses) ÷ total investment × 100%.

For a proper comparison, separate the calculation into several measures.

Metric	What it shows
Gross yield	Contractual rent relative to purchase price before expenses
Effective income	Income after vacancy and tenant concessions
NOI	Property income after recurring operating expenses
Cap rate	NOI relative to the property's price or market value
Net yield	Income after additional reserves relative to total investment
Payback period	The modelled period for cash flow to recover the investment
Cash-on-cash	Return on equity when debt is used

The key rule is: compare offices using the same methodology. Do not compare one property's gross yield with another's net yield.

How yield differs from profit

Profit is an amount of money.

For example, an office may produce a given amount of annual net cash flow.

Yield relates that result to invested capital.

The same cash flow produces different returns when the amount invested differs.

A high absolute profit does not necessarily mean an efficient investment.

An investor needs to know:

• how much cash the property generates;
• what proportion of invested capital that represents.

Gross office yield

Gross yield is the simplest measure.

Formula:

Gross yield = annual rent ÷ purchase price × 100%.

Assume:

• a hypothetical purchase price;
• a hypothetical contractual monthly rent;
• the resulting annual rent.

This gives:

annual rent ÷ purchase price × 100% = illustrative gross yield.

The result may look attractive but does not yet include:

• fit-out and furniture;
• tenant-search time;
• the rent-free period;
• owner’s expenses;
• insurance cover;
• taxes;
• management;
• fees;
• potential work after a tenant leaves.

Gross yield is useful for initial screening but is not enough for a purchase decision.

How much has actually been invested?

A common mistake is using only the sale price in the denominator.

Actual investment may include:

• the property price;
• legal support;
• technical due diligence;
• valuation;
• registration;
• brokerage fees;
• interest and financing fees;
• design;
• fit-out;
• engineering provision;
• furniture;
• multimedia systems;
• initial working-capital reserve;
• the period before rent starts.

The full formula is:

Total investment = purchase price + transaction costs + office preparation + equipment + other initial costs.

If additional capital is required after purchase, total investment is the purchase price plus that capital, not the purchase price alone.

Comprehensive preparation can represent a material part of the budget. The work is explained in our article on office fit-out.

Which income should be included?

The calculation may include more than base rent.

Potential property income may comprise:

• rent for the premises;
• parking income;
• rent from storage or technical rooms;
• reimbursements for certain services;
• indexation;
• other contractual receipts.

Use realistic income, not the theoretical maximum.

A contractual rate does not guarantee a full year of identical payments.

Income may be reduced by:

• vacancy before occupation;
• the rent-free period;
• introductory concessions;
• late payments;
• early tenant departure;
• partial vacancy;
• new-tenant acquisition costs.

The model should therefore calculate potential and effective income separately.

Potential gross income

Income at full occupancy with no concessions.

Effective gross income

Potential income less vacancy, concessions and payment losses, plus other receipts.

Formula:

Effective income = potential rent + other income − vacancy − concessions − uncollected amounts.

Effective income is the better basis for further calculation.

How to account for office vacancy

Even a good office may remain vacant for a period.

Use a supportable vacancy allowance rather than assuming permanent full occupancy.

Two methods are:

A percentage of annual income

Apply a vacancy allowance supported by market evidence:

annual potential income × vacancy allowance = vacancy deduction.

A period without a tenant

If a vacancy period is assumed:

monthly rent × assumed vacancy period = vacancy deduction.

A large or unusual property may take longer to let. Estimate this from comparable evidence, not the seller's assurance.

Also allow for work between tenants. Even if a new tenant is found immediately, the property may generate no rent during adaptation.

Which expenses are deducted from income?

Include only expenses actually borne by the owner.

Their composition depends on the lease.

Operating charges

The tenant may reimburse part of OPEX while part remains with the owner.

Check the following:

• maintenance of common areas;
• building management;
• security;
• lifts;
• engineering systems;
• cleaning;
• utilities;
• additional services.

Do not automatically treat all operating charges as an owner expense or pass them entirely to the tenant without contractual support.

The detailed cost structure appears in our article on office operating costs.

Routine repairs and maintenance

Even a new office incurs recurring costs:

• fault resolution;
• replacement of worn equipment;
• local repairs;
• engineering maintenance;
• restoration of finishes.

Property management

If the owner does not manage the office directly, costs may include:

• a property manager;
• accounting support;
• tenant management;
• payment monitoring;
• organising repairs.

Insurance

Insurance scope and cost depend on the property, owner and lender requirements.

Taxes

Tax exposure depends on:

• who owns the premises;
• the tax regime;
• the cadastral or other applicable base;
• contract structure;
• VAT treatment;
• other transaction circumstances.

Do not copy tax assumptions from another example. Calculate them for the specific owner.

Tenant-finding fee

This expense is not annual, but may be spread over the expected lease term or recognised when a tenant is replaced.

Reserve for future capital works

Climate-equipment replacement or a major interior refresh is not a normal monthly expense but should not be ignored.

An internal financial model may include an annual reserve.

What is NOI?

NOI is the property's net operating income.

Simplified formula:

NOI = effective gross income − owner operating expenses.

NOI generally includes property income and recurring operating expenses.

The following are generally considered separately:

• debt payments;
• depreciation;
• the owner's profit tax;
• major capital expenditure;
• future sale price.

This matters because NOI measures the property independently of whether it was purchased with equity or debt.

Assume the model includes:

• effective income — use the modelled amount;
• recurring owner expenses — use the modelled amount.

Then:

NOI = effective income − recurring owner expenses.

What is a capitalisation rate?

The capitalisation rate shows NOI as a proportion of property value.

Formula:

Capitalisation rate = NOI ÷ office value × 100%.

Apply the formula using the property's supportable NOI and value.

29 ÷ 300 × 100% = 9,67%.

The capitalisation rate helps compare income properties independently of individual debt structure.

It should be used carefully.

It does not directly show:

• office appreciation;
• future sale price;
• major capital expenditure;
• return on equity with debt;
• future rent changes;
• the timing of each cash flow.

A capitalisation rate alone is insufficient for a complex investment.

Net return on total investment

For a practical assessment, relate NOI and cash flow to the capital actually invested.

Assume the model includes:

• purchase price — use the transaction amount;
• transaction costs — use the actual budget;
• fit-out, furniture and equipment — use the actual budget;
• total initial investment — sum all initial costs;
• NOI — use the modelled result;
• future capital-works reserve — use a supportable allowance.

Cash flow after the reserve:

NOI − capital reserve = cash flow before financing.

Return on total investment:

cash flow after reserves ÷ total investment × 100%.

Compare the measures:

Metric	Result
Gross yield on purchase price	12%
Capitalisation rate on purchase price	9,67%
Return on total investment after reserves	7,64%

One property can produce three different figures, each answering a different question.

A stated office yield without the formula and assumptions tells an investor very little.

Office payback period

Simple payback is calculated as:

Payback period = total investment ÷ annual cash flow.

In the illustration:

total investment ÷ annual cash flow = simple payback period.

This is a convenient but crude measure.

It does not account for:

• the time value of money;
• inflation;
• rent growth;
• changing expenses;
• future sale price;
• the difference between cash flow today and in the future.

Simple payback is useful for initial comparison but does not replace a long-term financial model.

Complete illustrative office-return model

Consider a hypothetical property.

Initial investment

Item	Amount
Buying an office	Use the purchase price
Legal, technical and registration costs	Use the actual budget
Fit-out, furniture and equipment	Use the actual budget
Total investment	Sum all initial investment

Potential return

Item	Annual amount
Base rent	Use the modelled annual rent
Additional income	Use supportable additional income
Potential return	Potential gross income

Income adjustment

Item	Amount
Allowance for vacancy, rent-free periods and uncollected amounts	Deduct the supportable allowance
Effective income	Effective gross income

Recurring owner expenses

Item	Amount
Operation and maintenance	Use the actual operating budget
Management, insurance and routine repairs	Use the actual operating budget
Total operating expenses	Sum recurring owner expenses

Result

NOI = effective gross income − owner operating expenses.

Future capital-works reserve:

use a supportable annual allowance.

Cash flow before financing:

NOI − capital reserve = cash flow before financing.

Net yield:

cash flow after reserves ÷ total investment × 100%.

Simple payback period:

total investment ÷ annual cash flow.

The example shows why the actual result may differ materially from a yield calculated from a listing.

How debt affects returns

Debt does not change the office's operating performance but does change the return on equity.

Use the cash-on-cash measure:

Cash-on-cash = cash flow after debt payments ÷ equity invested × 100%.

Continue the hypothetical example:

• total investment — use the complete investment amount;
• debt — use the actual financing amount;
• equity — use the actual equity contribution;
• cash flow before debt — use the modelled amount;
• annual debt payments — use the financing schedule.

Owner cash flow:

cash flow before debt − debt payments = owner cash flow.

Return on equity:

9,5 ÷ 180 × 100% = 5,28%.

In this scenario, debt reduced the owner's current return on equity.

Under other conditions, leverage may increase it. The result depends on borrowing cost and property performance.

The key rule is:

If financing costs exceed the property's operating return, debt may weaken cash flow.

How to account for rent indexation

Indexation can increase future contractual income but should not be treated as guaranteed profit without reviewing the lease.

Check:

• the indexation formula;
• the first increase date;
• whether it applies to the whole rent;
• whether there is a cap;
• whether the tenant can reopen terms;
• whether future rent remains consistent with the market.

Prepare three scenarios:

Conservative

Lower indexation, longer vacancy and a cautious sale price.

Base

The most likely lease terms and expenses.

Optimistic

Stronger indexation, limited vacancy and value growth.

A purchase decision should not rely only on the optimistic scenario.

How rent-free periods affect returns

A rent-free period is a time when the tenant pays no rent or reduced rent.

For example:

• contractual rent — use the agreed monthly amount;
• rent-free period — use the agreed duration.

In the first year, actual base rent will be reduced by the rent-free period.

A marketing presentation may use a full annual rent even though first-year cash flow is lower.

Rent-free periods can be treated in two ways:

• recognise them fully in the first year;
• spread their economic effect across the lease term.

The first method is more relevant to near-term owner liquidity; the second may help compare longer leases.

Why tenant quality affects the calculation

Two offices with the same rent may carry different risk.

Assess:

• the tenant's financial standing;
• the company's operating history;
• industry;
• lease term;
• security deposit;
• early-termination rights;
• payment history;
• the tenant's investment in the premises.

A longer lease with a financially transparent company may make cash flow more predictable.

A well-known tenant name does not remove the need to review the terms.

For example, the lease may allow early exit without material compensation.

Return on a vacant office

For a vacant property, the calculation is based on a forecast rather than existing cash flow.

Check the following:

• market rent for comparable offices;
• a supportable letting period;
• likely rent-free period;
• adaptation cost;
• broker's fee;
• expenses during vacancy;
• competing offers.

Returns on vacant premises are more sensitive to assumptions.

A change in forecast rent may materially alter the result.

It is useful to model several cases:

• rent below expectations;
• base-case rent;
• rent above expectations.

Return on a property with a sitting tenant

A property with a sitting tenant may seem easier to assess because the lease is signed and payments are known.

Review more than the rent amount.

Establish:

• whether rent is at market level;
• the remaining lease term;
• whether indexation applies;
• who pays OPEX;
• whether early termination is possible;
• whether any amounts are outstanding;
• the deposit held;
• who pays for reinstatement.

If current rent is materially above market, income may fall after the tenant leaves.

If it is below market, there may be upside, but increases are constrained by the lease.

Return and liquidity are not the same

A high-return property is not always easy to sell.

A higher return may compensate for:

• a weaker location;
• a short lease;
• a difficult tenant;
• a specialised layout;
• high expenses;
• legal or technical risk.

Investors should separately assess office liquidity — how easily it can be sold or leased to another occupier.

A sound decision combines:

• return;
• cash-flow reliability;
• liquidity;
• property quality;
• risk.

How to run scenario analysis

A single financial model creates false precision.

Vary key inputs and observe how the return changes.

For the hypothetical office:

Scenario	Indicative Return
Base case	7,64%
Lower rental income	recalculate the resulting return
Higher vacancy allowance	recalculate the resulting return
Higher initial fit-out cost	recalculate the resulting return
Higher recurring expenses	recalculate the resulting return

Exact results depend on the model. The purpose is to identify the assumptions with the greatest impact.

The main risk may be vacancy for one office, fit-out for another and financing cost for a third.

How to compare several offices

Use one table and consistent assumptions.

Metric	Office 1	Office 2	Office 3
Purchase price
Transaction costs
Fit-out and furniture
Total investment
Potential rent
Vacancy allowance
Effective income
Owner expenses
NOI
Cap rate
Net yield
Payback period
Potential sale discount

Do not change methodology part-way through the comparison.

If one property includes fit-out, do not compare it with another modelled only as an unfinished shell.

How to assess an office for owner occupation

A corporate office is not always bought for rental income.

Where the company occupies it, there is no direct rental income.

Compare two scenarios instead.

Lease

• annual rent;
• indexation;
• OPEX;
• fit-out;
• potential relocation;
• no capital tied up in property.

Ownership

• purchase price;
• financing cost;
• fit-out;
• operation;
• taxes;
• residual property value;
• the option to sell or lease the property later.

The economic effect of ownership is not “rent paid to yourself”, but a combination of:

• no external rent;
• control over the premises;
• asset value;
• future exit value.

The two scenarios are compared in “Buying or Renting an Office in Moscow City”.

How to Evaluate F-375

The F-375 office penthouse belongs to a rare corporate-property format.

The property spans three levels on the upper part of Federation Tower East. Any parking included in an offer should be confirmed in the current transaction documents.

For a property like this, separate two possible scenarios.

Owner-occupied headquarters

The model assesses:

• the cost of leasing comparable space instead;
• ownership expenses;
• occupation period;
• fit-out;
• the strategic value of a unified headquarters;
• residual asset value.

Investment purchase

The model also requires:

• realistic market rent;
• a supportable tenant-search period;
• lease terms;
• owner’s expenses;
• a capitalisation rate for the comparable segment;
• future exit value.

Do not mechanically apply the return of a standard office unit to a unique property.

A small standard office and a multi-level trophy property have different audiences, uses and value structures.

F-375 should therefore be assessed both as a property asset and as an owner-occupied client-facing headquarters.

What to check before financial modelling

A good spreadsheet cannot solve problems with the property itself.

Before a final decision, review:

• title of ownership;
• encumbrances;
• agreements;
• any unauthorized layout changes;
• technical specifications;
• engineering capacity;
• the management company;
• documented parking rights.

The full process appears in commercial real estate pre-purchase due diligence checklist.

If the source information is wrong, even a perfectly calculated return is useless.

Common mistakes when calculating returns

Dividing rent only by purchase price

This ignores fit-out, transaction costs and equipment.

Ignoring vacancy

The model assumes permanent full occupancy.

Using a rate from a listing

An asking price may differ from the transaction price.

Forgetting rent-free periods

They can have a particularly strong effect on first-year cash flow.

Treating all OPEX as an owner expense

The tenant may reimburse part of the charges.

Excluding OPEX entirely

Some expenses may remain with the owner.

Failing to create a repairs reserve

Interiors and equipment do not last indefinitely.

Confusing NOI with cash flow after debt

NOI describes the property, not the financing structure.

Comparing gross and net yield

These figures are not directly comparable.

Assuming guaranteed price growth

Future property value is unknown.

Using only one scenario

An optimistic model does not demonstrate resilience.

How to calculate an office return: step by step

Step 1. Determine total investment

Add the purchase price, transaction costs, fit-out, furniture and equipment.

Step 2. Calculate potential income

Include rent from the premises, parking and other contractual receipts.

Step 3. Allow for vacancy

Deduct vacant periods, rent-free periods, concessions and potential non-payment.

Step 4. Determine owner expenses

Include operation, management, insurance, routine repairs and other recurring costs.

Step 5. Calculate NOI

Deduct operating expenses from effective gross income.

Step 6. Calculate several measures

Calculate gross yield, capitalisation rate, net yield and simple payback.

Step 7. Create several scenarios

Prepare conservative, base and optimistic cases.

Step 8. Review the property and lease

Verify rent, expense allocation, premises condition and legal characteristics.

In brief: how to calculate office returns properly

Office returns cannot be assessed with one formula from a listing.

A complete calculation should:

• identify all initial investment;
• forecast realistic rather than maximum income;
• allow for vacancy;
• separate owner and tenant expenses;
• calculate NOI;
• determine the capitalisation rate;
• calculate net cash flow;
• assess payback;
• test several scenarios.

Gross yield is useful for screening. A purchase decision requires net cash flow, risk and total entry cost.

For a unique owner-occupied headquarters rather than a standard rental unit, also consider alternative rent, long-term asset value and liquidity.

An example of such a space appears on the main office in Federation Tower.

Frequently Asked Questions

How do you calculate an office return?

Deduct vacancy and owner expenses from annual income, divide the resulting cash flow by total investment and multiply by 100%.

What is gross office yield?

It is annual contractual rent relative to purchase price before vacancy, fit-out, taxes and other expenses.

What is NOI?

NOI is property net operating income: effective income less recurring owner operating expenses.

What is a capitalisation rate?

It is annual NOI relative to purchase price or current market value.

How do you calculate an office payback period?

Divide total investment by annual cash flow. This gives simple payback without accounting for the time value of money or future sale price.

Should fit-out be included in return calculations?

Yes. If the property cannot be leased or used without work, fit-out, furniture and equipment should form part of total investment.

How should vacancy be accounted for?

Use a percentage of potential rent or a modelled vacancy period supported by evidence. Apply a consistent approach when comparing properties.

How does return differ from liquidity?

Return measures the financial result of ownership; liquidity measures how easily the office can be sold or leased without a material discount.