Washington Security Deposit Deduction Calculator

Estimate an itemized deduction worksheet while keeping Washington's deposit return deadline, itemization requirement, cleaning notes, and interest notes visible beside the math.

Primary source

RCW 59.18.280

Security deposit deduction worksheet

Worksheet preset: Washington security deposit rules

State rule reference

30 days after termination and vacation, or after learning of abandonment

Full and specific statement plus required documentation for retained amounts.

Line 1

ItemReplacement or repair costItem age at move-out (years)Wear allowanceDocumented damage share (%)Internal note (optional)

Remaining life

2.0 years

Value before wear

$720

Chargeable line

$720

Source: HUD Appendix 5D sample life expectancy chart. HUD examples list family-unit plush carpeting at five years; elderly-unit examples list seven years.

Estimated chargeable total

$720

Formula: chargeable = max(0, replacement_cost x remaining_life / useful_life) - wear_allowance, then multiplied by documented damage share.

Washington rule snapshot

Return deadline	30 days after termination and vacation, or after learning of abandonment
Itemization requirement	Full and specific statement plus required documentation for retained amounts.
Cleaning fee note	Charges require documentation and must be distinguished from wear resulting from ordinary use.
Interest note	Statewide interest is not the default for all residential deposits; local or lease terms may matter.
Normal wear note	Washington expressly requires a specific basis and documentation for retention.