What is the IADL used for?

The IADL Scale measures how independently an older adult performs complex everyday tasks such as cooking, shopping, managing money, and taking medications. Clinicians use it to judge whether a patient can live safely on their own, to detect early functional decline, and to guide decisions about support or further assessment.

How many items are on the IADL and how is it scored?

The scale covers eight domains: telephone use, shopping, food preparation, housekeeping, laundry, transportation, medication management, and finances. Each domain is scored 0 for dependent or 1 for independent, based on the patient's highest current function. Totals range from 0 to 8, where higher scores reflect greater independence.

Is there a cutoff score for the IADL?

No, the IADL Scale has no validated cutoff or severity bands. A score of 8 reflects full independence and 0 reflects complete dependence, but intermediate totals are not officially labeled. The most useful comparison is against the patient's own baseline, since a drop from prior function signals meaningful change.

Who should complete the IADL?

The IADL can be completed by the patient, but responses are best confirmed with a caregiver or family member when memory or insight is limited. Clinicians rate what the patient actually does now, not what they could do, so a knowledgeable informant improves accuracy for people with cognitive impairment.

How often should the IADL be repeated?

There is no fixed schedule, but the IADL is designed to track change over time. Many practices re-administer it at routine follow-up visits or after a hospitalization, illness, or change in health status. Comparing new scores to an earlier baseline shows whether function is stable, improving, or declining.

Is the IADL the same as the ADL scale?

No. Basic ADL scales measure fundamental self-care such as bathing, dressing, and eating. The IADL measures more complex tasks needed to live independently in the community, like managing medications and finances. Because instrumental tasks are more demanding, IADL decline often appears earlier than loss of basic self-care.

Instrumental Activities of Daily Living | Template & auto-scoring

The Lawton Instrumental Activities of Daily Living (IADL) Scale is a brief functional assessment that rates how independently an older adult performs eight everyday tasks, such as using the telephone, shopping, and managing medications. Clinicians use it to gauge a patient's capacity to live independently and to detect early functional decline over time.

Why healthcare providers use the IADL

Predicts independence. IADL performance signals whether a patient can safely manage life at home without daily assistance.
Detects early decline. Changes in instrumental tasks often appear before basic self-care is affected, giving an early signal of cognitive or physical change.
Guides care planning. Scores help teams decide where support, supervision, or further assessment may be needed.
Tracks change over time. Repeat administration shows whether function is stable, improving, or deteriorating.

Which settings use the IADL?

Primary care. Providers screen older adults during wellness visits to flag functional concerns.
Geriatric clinics. Specialists use it as part of a comprehensive geriatric assessment.
Home health. Visiting clinicians assess how well patients manage tasks in their own environment.
Rehabilitation. Teams measure functional recovery after illness, injury, or hospitalization.

What does the IADL measure?

The IADL focuses on the more complex activities needed to live independently, beyond basic self-care such as bathing or dressing. It assesses eight domains, each reflecting a task that requires planning, memory, and physical ability.

Communication and errands. Using the telephone, shopping, and arranging transportation.
Home management. Preparing meals, housekeeping, and doing laundry.
Health and finances. Managing medications and handling money.

Scoring the IADL

Number of items. Eight domains, with one score per domain.
Per-item scale. Each domain is rated 0 (dependent) or 1 (independent) based on the patient's highest level of function.
Total score range. 0 to 8. The original scale scored men on five items, but current practice is to assess all eight domains for everyone.
Score direction. Higher scores indicate greater independence, and lower scores indicate more dependence.

The IADL has no universally validated cutoff that defines impairment. Scores are most useful when compared against a patient's own baseline rather than a fixed threshold, since prior function, culture, and living situation shape what independence looks like. A decline from a previous score, or new dependence in a domain the patient once managed, is generally more meaningful than any single total. Use results to guide clinical decision-making, not as a standalone diagnosis.

The only widely recognized reference points are the scale's endpoints: a score of 8 reflects full independence across all assessed tasks, while 0 reflects complete dependence. There are no validated intermediate severity bands, so avoid labeling mid-range totals as mild or moderate impairment.

Best practices for administration

Assess current function. Ask about what the patient actually does now, not what they could do or once did.
Use a reliable informant. When cognition or insight is limited, confirm answers with a caregiver or family member.
Score all eight domains. Rate every task for all patients regardless of gender, following current recommendations.
Set a baseline. Record an initial score so later administrations can reveal change.
Repeat at intervals. Re-administer during follow-up visits or after a change in health status to monitor trends.
Note the context. Document living situation and available support, which affect how scores should be interpreted.

How Zentake helps with the IADL

Automatic scoring. Zentake totals every domain on submit, so there is no hand-tallying.
Longitudinal tracking. Re-send the IADL on a schedule and view change over time.
Before the visit. Patients complete it from home on any device, so Geriatrics practices start the appointment already informed.
HIPAA compliant. Data is encrypted, with a signed BAA on every plan.

References

The IADL Scale was developed by Lawton and Brody (1969), in Assessment of Older People: Self-Maintaining and Instrumental Activities of Daily Living, published in The Gerontologist, which remains the primary validation source for the instrument.

For current scoring and administration guidance, see the Hartford Institute for Geriatric Nursing Try This series and the Merck Manual professional edition. Both describe the 0 to 8 scoring and note that the scale has no validated severity cutoffs.

Last updated: August 2026

Instrumental Activities of Daily Living