Trust vs Will: Key Differences, Real Costs, and How to Choose the Right One for Your Family

What Is a Will and What Does It Actually Do?

A will is a legal document that states how you want your assets distributed after you die. It takes effect only after death. Until then, it does nothing.

A will lets you do four important things. You can name the people or organizations who inherit your assets. You can appoint an executor, which is the person responsible for carrying out your wishes and managing your estate through the legal process. You can name a guardian for your minor children, which is one of the most important decisions any parent makes. And you can leave specific gifts to people or causes you care about.

One thing a will cannot do is bypass probate. In most cases, a will must go through a court-supervised process called probate before any assets are distributed. Probate can take months, sometimes over a year. It can cost your estate anywhere from three to seven percent of its total value in legal and court fees. In California, probate fees are set by statute. On a $1 million estate, those fees can reach $46,000 or more. In New York, probate is generally less expensive, but it is still public, time-consuming, and can be contested.

A will also becomes a public record once filed for probate. Anyone can search the court records and see what you owned and who received it.

What Is a Trust and How Is It Different?

A trust is a legal arrangement where you transfer ownership of your assets into a structure managed by a trustee. The trustee is often you, during your lifetime. Assets are held for the benefit of your chosen beneficiaries.

Unlike a will, a trust works while you are still alive. A revocable living trust, the most common type, lets you control your assets completely while you are alive and well. If you become incapacitated, your successor trustee steps in without any court involvement. When you die, assets pass directly to your beneficiaries. There is no probate, no public record, and no delays.

An irrevocable trust works differently. Once created, you generally cannot change or cancel it. This type is often used for asset protection, tax planning, or Medicaid planning. Business owners, founders with equity, and high-net-worth families in New York often use irrevocable trusts to reduce exposure to the state estate tax or protect assets from future creditors.

The critical point to understand: a trust only covers assets that have been formally transferred into it. Your home, investment accounts, and business interests must be re-titled in the trust's name. Any assets left outside the trust still pass through your will and likely through probate.

Key Differences: Trust vs Will

Here is a side-by-side comparison of how a will and a trust differ across the dimensions that matter most to married couples with families and assets:

Three Advantages of a Trust Over a Will

If you are weighing whether a trust is worth the additional upfront cost, here are the three most meaningful advantages it offers over a will alone.

1. Probate avoidance. Assets held in a revocable living trust pass directly to beneficiaries without court involvement. For a California couple with a $1.5 million home and an investment account, this alone can save $50,000 or more in probate fees. It also removes over a year of delays for their family.

2. Incapacity protection. A will does nothing if you become seriously ill or incapacitated while still alive. A trust lets your successor trustee manage your finances right away. They can pay bills, manage investments, and sell assets if needed. No court-appointed conservatorship is required, which is both expensive and emotionally difficult for families.

3. Control over distributions. With a trust, you can set conditions on when and how beneficiaries receive their inheritance. You can stagger distributions over time, hold assets for a child's education, or protect an inheritance from a beneficiary's creditors or a future divorce. A will cannot do any of this.

What Assets Cannot Be Placed in a Trust?

Not everything belongs in a trust, and some assets cannot go in one at all. Understanding these limits helps you build a complete plan rather than assuming your trust covers everything.

Assets that typically cannot or should not go into a trust include:

• IRAs, 401(k)s, and retirement accounts. Transferring these into a trust triggers immediate taxation. Instead, name your spouse or a carefully structured trust as beneficiary through the account's beneficiary designation form.
• Health Savings Accounts (HSAs). Like retirement accounts, HSAs cannot be transferred into a trust without losing their tax-advantaged status.
• Life insurance policies. The policy itself stays outside the trust. You can, however, name a trust as the beneficiary so proceeds are distributed according to your trust's terms rather than going outright to a minor.
• Vehicles (in some states). Re-titling cars into a trust can create complications with insurance and registration. Many estate planners recommend leaving vehicles to pass through a will instead.
• Certain business interests. Partnership agreements and operating agreements sometimes restrict transferring interests into a trust without consent from other partners. Review your agreements carefully before proceeding.

This is why most estate planning attorneys recommend having both a trust and a will. The will acts as a safety net. Anything not in your trust at death flows through the will into the trust, or distributes directly as you specify. It is also the only document that lets you name a guardian for your children.

When Should You Do a Trust Instead of a Will?

A trust is worth the additional setup cost in certain situations. The more of the following that apply to you, the stronger the case for a trust.

• You own real estate in California. California probate is expensive and public. A revocable living trust is one of the most effective ways for California property owners to protect their estate from unnecessary fees.
• Your combined estate is approaching or above the New York estate tax threshold. In 2026, that threshold is $7.16 million. With the NY estate tax cliff, careful trust planning makes a meaningful financial difference.
• You have minor children and significant assets. A trust lets you control when and how children receive their inheritance. This prevents a lump sum from going to an 18-year-old with no financial experience.
• You have equity compensation such as RSUs, stock options, or a stake in a startup. Transferring these assets into a trust requires planning, but it protects their value for your family and can reduce estate exposure.
• You want to avoid court involvement if you become incapacitated. Without a trust, your family may need to go to court to get legal authority to manage your finances. That process is slow and costly.
• You value privacy. If you prefer that your assets, heirs, and distribution terms remain private and not searchable in any court record, a trust is the only way to achieve that.

If none of these apply and your estate is simple, a well-drafted will may be all you need for now. Estate planning evolves as your life does.

Common Mistakes Couples Make When Choosing Between a Trust and a Will

Even couples who take the time to create estate planning documents often make avoidable mistakes. Here are the most common ones.

• Creating a trust but not funding it. A trust that holds no assets is useless. The most common mistake is setting up a revocable living trust and never transferring the home, accounts, or investments into it. At death, those assets still go through probate.
• Assuming a will avoids probate. Many people believe that having a will means their family avoids court. It does not. A will is a set of instructions for the probate court. The process is still public, slow, and costly.
• Forgetting beneficiary designations. Retirement accounts, life insurance, and certain bank accounts pass by beneficiary designation. They do not pass through your will or trust. If your beneficiary designations are outdated or missing, the wrong people may inherit regardless of what your will says.
• Treating estate planning as a one-time event. Marriage, divorce, the birth of a child, a home purchase, and a business sale all change your estate planning needs. Documents that made sense five years ago may be inadequate today.
• Not coordinating between spouses. Couples often create estate plans independently. Misaligned documents with different executors, inconsistent beneficiaries, and conflicting guardianship wishes create real problems for families and courts.

How Neptune Helps Couples Prepare for These Decisions

Neptune help couples prepare thoughtfully and completely. When they do sit down with an attorney, they are clear, aligned, and ready.

Neptune costs $5000 per couple. That fee connects you with two independent, highly qualified family law attorneys, one for each partner. This ensures that both people in the relationship have their own independent counsel. The platform guides couples through a structured preparation process that surfaces the financial, legal, and personal questions they need to address before making estate planning decisions.

For married couples navigating the trust vs will decision, that preparation matters. Understanding what you own, how it is titled, what your state requires, and what your goals are for your children and assets shapes which documents you need and how they should be structured.

The Bottom Line

A will and a trust are not competing tools. They are complementary ones. A will is the foundation and is especially critical if you have children. A trust adds a layer of protection, privacy, and efficiency that a will alone cannot provide.

For married couples in New York and California, the stakes are higher than in most states. Probate fees, community property rules, and state estate tax thresholds all affect how your estate planning documents need to be structured. Getting this right now, while your family is healthy, is one of the most responsible things you can do for the people who depend on you.

The first step is not choosing between a trust and a will. The first step is having an open conversation with your partner about what you own, what you want, and what you are protecting against.