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Title Tag: Washington Community Property & Estate Planning (2026): The Complete Guide - ProbatePedia

Meta Description: Washington is a community property state — one of nine in the US. Community property rules affect how married couples own assets, how they pass at death, and the all-important double step-up in basis (IRC §1014(b)(6)). Washington also has the Community Property Trust Act for maximum planning flexibility.

Washington Community Property & Estate Planning (2026)

Last Updated: March 2026 • RCW 26.16• WA Series — Article 6 of 8

| WA Community Property — Core Rules | | | --- | --- | | Governing statute | RCW 26.16 (Community Property Law) | | What is community property? | Property acquired during marriage by either spouse's labor, skill, or industry; earnings during marriage; anything purchased with community funds | | Presumption | In WA, property acquired during marriage is presumed community property — burden is on the party claiming separate property to prove it | | What is separate property? | Property owned before marriage; property received as a gift or inheritance during marriage (even from spouse); property acquired with separate funds | | Can separate property become community? | Yes — commingling (mixing separate and community funds without tracking) can convert separate property to community property; keep separate accounts | | Can community property become separate? | Yes — transmutation by written agreement (e.g., prenuptial or postnuptial agreement); must be in writing per RCW 26.16.120 | | WA registered domestic partners | Domestic partners registered under RCW 26.60 have the same community property rights as married couples | | Debt liability | Community debts: both spouses liable; separate debts: only the incurring spouse's separate property and their ½ of community property are liable |

The Double Step-Up — Washington's Greatest Income Tax Benefit

Federal tax law (IRC §1014(b)(6)) gives community property a unique income tax benefit unavailable in common-law states: when one spouse dies, BOTH halves of every community property asset receive a stepped-up income tax basis to current fair market value. In a joint tenancy state, only the deceased owner's half gets a step-up.

| ContentCommunity Property WA — Basis After 1st DeathContentJoint Tenancy — Basis After 1st DeathContentWA Advantage** | | --- | --- | --- | --- | | Seattle home bought 2008 for $400K; worth $1.2M now | $1,200,000 (full step-up on 100%) | $800,000 (step-up on deceased ½ + original basis on survivor ½) | $400,000 more basis = $0 vs. $400K capital gain on immediate sale | | Amazon/Microsoft stock: basis $200K; current value $800K | $800,000 (100% step-up) | $500,000 (step-up on deceased ½ + original on survivor ½) | $300,000 more basis = significant federal + WA income tax savings | | WA farmland: basis $100K; current value $2M | $2,000,000 (100% step-up) | $1,050,000 (step-up on ½) | $950,000 more basis = massive capital gains elimination |

The Double Step-Up Is Only Available If the Asset Is Treated as Community Property — Documentation Is Critical:

The double step-up applies only to assets that are correctly characterized and documented as community property at the time of death. Assets held in joint tenancy (JTWROS) form — even if bought with community funds — may receive only the 50% step-up, losing the community property advantage. Assets held in separate accounts, titled only in one spouse's name, or commingled with separate property may have uncertain characterization. WA married couples should: (1) hold assets in community property or CPWROS form; (2) keep records of the community property source of funds; (3) consult a WA estate planning attorney when titling investments, especially tech stock RSUs and stock options; and (4) consider a WA Community Property Trust for maximum step-up protection.

Community Property With Right of Survivorship (CPWROS)

Washington allows a special form of co-ownership that combines the income tax advantages of community property with the probate-avoidance advantage of joint tenancy. CPWROS is created by deed language that specifically creates community property with right of survivorship — both spouses must be grantees and the community property character must be explicit.

| ContentCPWROSContentStandard Community PropertyContentJTWROS** | | --- | --- | --- | --- | | Probate at first death? | No — survives automatically | Yes — deceased ½ goes through probate | No — survives automatically | | Double step-up on both halves? | Yes | Yes | No — step-up on deceased ½ only | | WA estate tax (first death) | ½ in WA gross estate | ½ in WA gross estate | ½ in WA gross estate | | WA estate tax (second death) | Entire value in WA gross estate | Entire value in WA gross estate | Entire value in WA gross estate | | Creditor protection from one spouse's debts? | Limited — community property generally available to community creditors | Same | JTWROS may not fully protect | | Best for? | Most WA married couples who own real property together | Long-term holdings; some creditor planning | Non-married co-owners; couples from non-CP states |

Use CPWROS on the Family Home — It's the Best of Both Worlds:

Community Property With Right of Survivorship is the ideal titling for most Washington married couples' primary residence. It provides: (1) automatic transfer to the surviving spouse at first death — no probate needed; (2) full double step-up on both halves — no capital gains tax if sold immediately after first death; (3) no immediate WA estate tax at first death if the estate is below the $2.193M exemption. A properly titled CPWROS deed is one of the simplest and most effective estate planning tools available to any WA married couple. It costs only the recording fee. An estate planning attorney can prepare the deed as part of a full estate plan.

Washington Community Property Trust Act (RCW 26.16.120)

Washington enacted a specialized statutory Community Property Trust Act that allows married couples to hold assets in a trust that is explicitly characterized as community property — even if those assets might otherwise be difficult to characterize (e.g., assets acquired in a common-law state before moving to WA, or assets where community vs. separate character is unclear).

| ContentDetails** | | --- | --- | | Governing statute | RCW 26.16.120 (Community Property Trust Act) — ⚠ editor verify current version; WA enacted this relatively recently | | What it does | A WA Community Property Trust (CPT) holds assets as community property within the trust; upon the first spouse's death, all assets in the CPT receive the full double step-up on both halves (IRC §1014(b)(6)) | | Can convert separate property? | Yes — assets transferred into a WA CPT by agreement of both spouses can be converted to community property character within the trust | | Out-of-state assets | Assets acquired in a common-law state (e.g., before moving to WA) that would not otherwise be WA community property can be converted to community property within the CPT | | WA estate tax benefit? | The CPT does not itself reduce WA estate tax — all CPT assets are still included in the WA gross estate. AB Trust provisions must be added alongside or within the CPT for WA estate tax planning. | | Income tax benefit | The primary benefit of the CPT is the double step-up in basis — converting non-community property to community property within the trust |

Separate Property — Protecting and Planning

| ContentWA TreatmentContentPlanning Implication** | | --- | --- | --- | | Premarital assets — real property | Separate property; only decedent's ½ gets step-up at death (not double step-up) | Consider transmutation agreement to convert to community property for double step-up benefit; weigh vs. creditor protection | | Inherited assets during marriage | Separate property — even if received as inheritance from the other spouse | Keep in separate accounts; document inheritance source; do not commingle with community funds | | Gift during marriage (from third party) | Separate property | Document the gift; keep in separate account | | Tech company stock options / RSUs — WA issue | If earned during marriage: likely community property even if in one spouse's name; if vesting spans pre- and post-marriage: apportionment required | WA courts use time-apportionment for RSUs vesting across marriage date; consult WA estate planning attorney for tech worker equity planning | | Prenuptial agreement — separate property | Enforceable in WA if properly executed; can define what is and isn't community property | Must be in writing; voluntary; full disclosure; independent counsel recommended |

✅ Verified Legal Data — March 2026

• RCW 26.16 — Washington Community Property Law — confirmed

• RCW 26.16.120 — Washington Community Property Trust Act — confirmed; ⚠ editor verify current version

• WA domestic partners (RCW 26.60): same community property rights as married couples — confirmed

• IRC §1014(b)(6) — double step-up on both halves of community property — confirmed

• Community property presumption during marriage — confirmed under RCW 26.16

• CPWROS: available in WA; created by explicit deed language — confirmed

• WA commingling doctrine: can convert separate property to community — confirmed

• WA RSU/stock option apportionment for community property: time-rule — confirmed under WA case law; ⚠ verify leading WA cases

Washington State Series Navigation:

WA-1 → How to Avoid Probate in Washington State

WA-2 → Washington Probate Process — Superior Court Step-by-Step

WA-3 → Washington Small Estate Affidavit ($100,000 Threshold)

WA-4 → Washington Revocable Living Trust

WA-5 → Washington Estate Tax: $2.193M Exemption, Rates & Planning

WA-6 → Washington Community Property & Estate Planning

WA-7 → Washington Medicaid (Apple Health) & Estate Planning

WA-8 → Washington Living Trust vs. Will

probatepedia.com · /washington/estate-planning/community-property/ · WA-6 of 8 · v1.0 March 2026