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Core Investments Framework · Returns

Core Net Yield Underwriting Method™

The standardised six-step method for converting brochure gross yield into investor-realised net yield in Thailand property.

Last reviewed · 2026-06-14

Executive Summary

What Net Yield Underwriting Method decides.

Brochure gross yield is the most over-quoted and least useful number in Thai property marketing. The Core Net Yield Underwriting Method is a standardised six-step conversion that produces an investor-realised net yield, comparable across assets, sub-markets and operator contracts. The method is the income half of the Core Total Return Component Model.

  • 01

    Six sequential deductions: operator share, sinking fund/FF&E, CAM and tax, vacancy, FX, withholding.

  • 02

    Input is realised 24–36-month income — never brochure.

  • 03

    Output is investor-realised net yield, comparable cross-asset and cross-market.

  • 04

    Embedded in the Total Return Calculator's certified income engine.

  • 05

    Used unchanged in our research, calculator and consultation work.

When To Use

Apply this framework when…

  • ▸For any income-objective Thailand asset.
  • ▸When comparing a marketed yield to a realised yield.
  • ▸When standardising yield across hotel-managed, branded and self-managed assets.
  • ▸When sizing a rental-income mandate.

When Not To Use

Do not apply when…

  • ▸For pure capital-growth assets with no rental income.
  • ▸For pre-handover off-plan assets with no operating history (use forecast underwriting).

The Framework

Core Net Yield Underwriting Method™

Proprietary Core Investments methodology. Designed for repeatable, comparable, evidence-based investment decisions.

  1. 01

    1. Establish Realised Gross Income

    Use 24–36 months of realised owner-statement income. Reject brochure or modelled gross income as the starting figure.
  2. 02

    2. Deduct Operator Share & Marketing Levy

    Apply the contractual operator share, marketing levy and any channel-distribution costs as they appear in the contract, not the brochure.
  3. 03

    3. Deduct Sinking Fund & FF&E Reserve

    Apply the actual sinking fund contribution and FF&E reserve obligations consistent with asset age and brand standard.
  4. 04

    4. Deduct Common-Area Charges & Property Tax

    Apply CAM, building insurance, property tax and any owners-committee levies.
  5. 05

    5. Apply Realistic Vacancy

    Apply a vacancy assumption grounded in realised seasonality and operator-confirmed occupancy, not marketing.
  6. 06

    6. Apply FX & Withholding

    Convert to investor's home currency and net withholding tax. Output is investor-realised net yield, comparable across markets.

Inputs

Variables in.

  • · Revenue Inputs: Purchase price
  • · Revenue Inputs: Gross rental yield
  • · Revenue Inputs: Occupancy assumptions
  • · Revenue Inputs: ADR assumptions
  • · Revenue Inputs: Seasonal assumptions
  • · Revenue Inputs: Rental pool assumptions
  • · Operator Inputs: Operator participation percentage
  • · Operator Inputs: Hotel management structure
  • · Operator Inputs: Revenue share arrangements
  • · Operator Inputs: Performance fee arrangements
  • · Cost Inputs: Common area fees
  • · Cost Inputs: Maintenance costs
  • · Cost Inputs: Management costs
  • · Cost Inputs: Administrative expenses
  • · Cost Inputs: Insurance costs
  • · Risk Inputs: Vacancy assumptions
  • · Risk Inputs: Occupancy volatility
  • · Risk Inputs: Market maturity
  • · Risk Inputs: Tourism dependency
  • · Investor Inputs: Ownership structure
  • · Investor Inputs: Reporting currency
  • · Investor Inputs: Income objectives
  • · Investor Inputs: Holding period

Outputs

Decisions out.

  • · Gross Yield Analysis: Understanding of projected top-line income.
  • · Cost Analysis: Identification of all material deductions.
  • · Income Dependency Analysis: Understanding of income drivers and income risks.
  • · Net Yield Analysis: Comparable net yield after deductions.
  • · Yield Sustainability Assessment: Evaluation of whether projected income appears realistic and sustainable.
  • · Opportunity Comparability Assessment: Allows opportunities to be compared on a like-for-like basis.
  • · Investor Income Estimate: Estimated income available to the investor after material deductions.

Worked Example

Net Yield Underwriting Method, applied to a Thailand case.

Gross Yield Versus Net Yield

Opportunity

Location: Bang Tao, Phuket

Purchase Price: THB 10,000,000

Advertised Gross Yield: 10.0%

Projected Gross Income: THB 1,000,000 per annum

Underwriting Adjustments

Operator Participation: 15% — THB 150,000

Common Area Fees: THB 50,000

Maintenance Allowance: THB 30,000

Sinking Fund Provision: THB 20,000

Vacancy Allowance: THB 50,000

Total Deductions: THB 300,000

Net Investor Income: THB 700,000

Net Rental Yield: 7.0%

Conclusion

The project advertises: 10.0% Gross Yield

The investor receives: 7.0% Net Yield

The difference is material.

The Core Net Yield Underwriting Method™ exists to identify these differences and improve comparability.

Governance & Methodology

Framework Purpose

The Core Net Yield Underwriting Method™ exists to improve income transparency and investment decision quality.

Its purpose is not:

Marketing

Promotion

Lead generation

Sales optimisation

Its purpose is to identify realistic investor income.

Core Methodology

Gross Revenue

↓

Revenue Participation

↓

Operating Costs

↓

Maintenance Costs

↓

Vacancy Allowance

↓

Currency Considerations

↓

Net Investor Income

↓

Net Rental Yield

Governance Rule #1

Net Yield Before Yield Conclusions

Governance Rule #2

Underwriting Before Marketing

Governance Rule #3

Comparability Before Conclusions

Governance Rule #4

Assumptions Before Projections

Governance Rule #5

Truth Mode

Always distinguish:

FACT

ASSUMPTION

PROBABILITY

UNKNOWN

Framework Limitations

This framework:

Does not predict future income

Does not predict occupancy

Does not predict tourism demand

Does not eliminate risk

Does not replace legal advice

Does not replace tax advice

Does not guarantee outcomes

The framework improves underwriting quality.

It does not remove uncertainty.

Framework Review Process

Review triggers:

Market changes

New underwriting standards

New research

Methodology updates

Recommended review cycle:

Every 12 months.

Emergency reviews may occur when significant market changes justify reassessment.

Authority Positioning Statement

The Core Net Yield Underwriting Method™ is the primary income-underwriting framework used throughout the Core Investments Investment Intelligence System.

It governs:

Yield analysis

Income underwriting

Opportunity comparison

Calculator interpretation

Consultation discussions

Research publications

Educational content

By converting projected gross income into comparable net income, the framework seeks to improve transparency, comparability, and decision quality.

The objective is not to identify the highest advertised yield.

The objective is to identify realistic investor income after material deductions.

Common Pitfalls

Where investors get this wrong.

  • !

    Confusing Gross Yield With Net Yield: Gross yield is not investor income.

  • !

    Ignoring Operator Participation: Revenue-sharing structures can materially affect returns.

  • !

    Ignoring Common Area Fees: Recurring operating expenses reduce investor income.

  • !

    Ignoring Maintenance Costs: Maintenance requirements affect long-term income sustainability.

  • !

    Ignoring Vacancy Risk: Perfect occupancy assumptions are rarely realistic.

  • !

    Ignoring Sinking Funds: Long-term asset maintenance should be considered.

  • !

    Comparing Gross Yield To Net Yield: This creates misleading comparisons.

  • !

    Assuming Guaranteed Returns Remove Risk: Guarantees have terms, conditions, and counterparty risk.

  • !

    Ignoring Currency Effects: Currency movements may influence realised income.

  • !

    Treating Marketing Material As Underwriting: Marketing material should be validated through independent analysis.

Applied In

Where Net Yield Underwriting Method operationalises across Core Investments research.

Related Frameworks

Other Core Investments frameworks that pair with this one.

Frequently Asked

Net Yield Underwriting Method, common questions.

Q01
Does the framework predict future income?
No. The framework evaluates assumptions and deductions. It does not predict future performance.
Q02
Why is net yield more important than gross yield?
Investors receive net income. Not gross income.
Q03
Can two projects advertise the same yield but produce different income outcomes?
Yes. Different deduction structures create different investor outcomes.
Q04
Does a rental guarantee improve underwriting quality?
Not automatically. The guarantee structure and provider must also be evaluated.
Q05
Why are sinking funds included?
Because long-term maintenance costs affect real investor returns.
Q06
Why is vacancy included?
Vacancy risk exists in all rental markets. Ignoring vacancy can overstate returns.
Q07
Is the framework only relevant to Thailand?
No. The methodology can be applied globally.
Q08
Why does the framework evaluate operator participation?
Because operators often retain a significant share of revenue. This affects investor income.
Q09
Can this framework be applied to hotel-managed assets?
Yes. It was specifically designed to evaluate managed and hotel-managed opportunities.
Q10
Does the framework replace tax advice?
No. Tax advice should be obtained from appropriately qualified professionals.

From framework to numbers

Apply Net Yield Underwriting Method in the Total Return Calculator.

Model the inputs from this framework against transparent Core Investments assumptions and download an institutional-grade report.

Open Calculator

Illustrative scenarios using calculator default assumptions. Outcomes vary with market conditions, operator performance and investor inputs.

Direct Access

Speak with Frank about Net Yield Underwriting Method.

Request a confidential briefing on how Core Net Yield Underwriting Method™ applies to your specific Thailand mandate, ownership structure and return objective.

Frank Satar
Chief Founder & Research Director
Thailand / WhatsApp
+66 65 551 3269
WhatsApp FrankCall FrankEmail FrankRequest Consultation

About the Author

Frank Satar

Chief Founder & Research Director · Core Investments

Frank Satar is the Chief Founder & Research Director of Core Investments. With more than three decades of experience across real estate, finance, hospitality and investment advisory, he specialises in analysing tourism demand, infrastructure growth and property market fundamentals across Thailand. His research is guided by a simple principle: We begin with demand, not property.

Published 2026-06-01Updated 2026-06-14View author profile →

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Important information.

General disclaimer

Core Investments provides investment education, market intelligence, research and transaction-support services. Information published on this website is general in nature and does not constitute financial, investment, legal, tax or accounting advice, or personal recommendations. Investors should seek independent professional advice appropriate to their individual circumstances before making any investment decision. Past performance is not indicative of future results.

Forecast disclaimer

Forecasts, projections and forward-looking statements are based on information available at the time of publication and involve assumptions that may not materialise. Future events may differ significantly from projected outcomes.