Concept Architecture
Concept
Theoretically, Impoverishing Health Expenditure (IHE) is a measure of financial hardship that quantifies the extent to which out-of-pocket healthcare payments push households below a defined poverty line or further deepen existing poverty. It is a core indicator of financial protection under Universal Health Coverage and is founded on welfare economics, poverty measurement and household consumption theory. Unlike catastrophic health expenditure, which measures excessive spending relative to household resources, impoverishing health expenditure evaluates the impact of healthcare payments on poverty status.
Mathematically, impoverishing health expenditure is assessed by comparing household consumption or income before and after deducting out-of-pocket healthcare payments. A household is considered impoverished if post-payment resources fall below a specified poverty threshold. The methodology also supports estimation of poverty headcount, poverty gap and normalised poverty gap before and after healthcare payments, thereby quantifying the poverty impact attributable to healthcare expenditure.
In practice, household survey data are used to estimate total household consumption or income, out-of-pocket healthcare expenditure and an appropriate poverty line, such as the international poverty line or a nationally defined threshold. In health economics, impoverishing health expenditure is widely used to evaluate financial protection, compare health systems and monitor progress towards Universal Health Coverage.
Purpose
Used to quantify the extent to which out-of-pocket healthcare payments increase poverty, supporting evaluation of financial protection, health financing policy and progress towards Universal Health Coverage.
Mathematical Formulae
Primary Formula
Post-payment expenditure = X? ? OOP?
Household i is impoverished if:
X? ? OOP? < z
where:
- X? = household consumption or income
- OOP? = out-of-pocket health expenditure
- z = poverty line
Supporting Formulae
Poverty headcount:
H = (1 / n) ? ?I(X? ? OOP? < z)
Poverty gap:
PG = (1 / n) ? ?max(0, z ? (X? ? OOP?))
Normalised poverty gap:
NPG = PG / z
Related Mathematical Methods
- Poverty Headcount Ratio
- Poverty Gap
- Normalised Poverty Gap
- Catastrophic Health Expenditure
- Financial Risk Protection
- Household Consumption Analysis
- Universal Health Coverage Monitoring
Example
A household has annual consumption expenditure of �5,800 and incurs �900 in out-of-pocket healthcare payments. The poverty line is �5,200.
Post-payment expenditure:
�5,800 ? �900 = �4,900
Because:
�4,900 < �5,200
the household is classified as experiencing impoverishing health expenditure. The associated poverty gap is:
�5,200 ? �4,900 = �300
Excel Implementation
| Function | Example Formula | Health Economics Application |
|---|---|---|
| IF | =IF((B2-C2)<$F$1,1,0) | Identify households pushed below the poverty line after healthcare payments. |
| MAX | =MAX(0,$F$1-(B2-C2)) | Calculate the poverty gap attributable to healthcare payments. |
| COUNTIF | =COUNTIF(D2:D1001,1)/COUNT(D2:D1001) | Estimate the post-payment poverty headcount. |
| AVERAGE | =AVERAGE(E2:E1001) | Calculate the average poverty gap across households. |
VBA (Optional)
Automate estimation of impoverishment incidence, poverty gaps and financial protection indicators using household expenditure survey data and alternative poverty thresholds.
Sources
- World Health Organization. Tracking Universal Health Coverage: Global Monitoring Report.
- Xu K. Distribution of Health Payments and Catastrophic Expenditures Methodology. World Health Organization.
- O'Donnell O, van Doorslaer E, Wagstaff A, Lindelow M. Analyzing Health Equity Using Household Survey Data.
- Wagstaff A, Flores G, Hsu J, et al. Progress on catastrophic health spending in 133 countries. The Lancet Global Health.
- World Bank. Monitoring Progress towards Universal Health Coverage.
Related Concepts (2)
Frequently Asked Questions (6)
What is impoverishing health expenditure?
Out-of-pocket healthcare spending that pushes household income or consumption below an established poverty line, or further below it.
Source: Xu et al. 2003
What does impoverishing health expenditure push a household below?
Impoverishing health expenditure is out-of-pocket spending on care that pushes a household's income or consumption below an established poverty line, or further below it if the household was already poor. What marks it out is this crossing into poverty: care is paid for, but at the price of the family's basic economic security. It is a grave concern because it can trap households in lasting hardship, and it overlaps with catastrophic health expenditure, which measures large spending relative to means rather than the fall into poverty. Medical costs that drive a family into poverty is what it names. Xu and colleagues (2003) define it.
Source: Xu et al. 2003
What makes health expenditure impoverishing?
Health expenditure is impoverishing when out-of-pocket spending pushes a household's income or consumption below a poverty line, or further below it, so the spending impoverishes the household. So health expenditure is impoverishing when it pushes households below a poverty line, which is why the poverty line defines it, since spending that drops the household below or deeper below it impoverishes, and out-of-pocket healthcare spending that pushes income or consumption below the poverty line is impoverishing because it forces the household into or deeper into poverty.
Source: Xu et al. 2003
Why is impoverishing health expenditure a concern?
Impoverishing health expenditure is a concern because it pushes households into or deeper into poverty through the cost of care, causing hardship and reflecting inadequate protection against out-of-pocket costs. So impoverishing health expenditure is a concern for household welfare, which is why it is a focus, since spending that impoverishes causes serious hardship, and impoverishing health expenditure is a concern because it indicates healthcare costs driving households into poverty, reflecting a lack of financial protection against out-of-pocket spending.
Source: Xu et al. 2003
How does impoverishing health expenditure affect households?
Impoverishing health expenditure affects households by pushing their income or consumption below a poverty line, or further below, through healthcare costs, so they are impoverished or driven deeper into poverty. So impoverishing health expenditure affects households by impoverishing them, which is why it is severe, since the spending drops them below the poverty line, and impoverishing health expenditure affects households by forcing them into or deeper into poverty through the cost of care, causing serious financial hardship.
Source: Xu et al. 2003
How does impoverishing health expenditure relate to catastrophic health expenditure?
Impoverishing health expenditure relates to catastrophic health expenditure in that both are measures of financial hardship from out-of-pocket healthcare costs, with impoverishing expenditure defined by pushing households below a poverty line and catastrophic by exceeding a threshold share of income. So impoverishing and catastrophic health expenditure are related hardship measures, which is why they are compared, since both capture severe financial impact of healthcare costs but in different ways, and impoverishing health expenditure focuses on poverty while catastrophic on the share of income, together indicating the financial hardship healthcare costs can cause.
Source: Xu et al. 2003
Trust Record
Verified by Dr Darrin Baines
British health economist
Professional identity: darrinbaines.org
Verification date: 6 Jan 2026
Content version: 1.0.0
Canonical Identity
- Term code
- HS-HP-HF-041
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