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Updated May 14, 2026 · Planning · Educational use only ·

Will vs Intestacy Calculator

Expected saving from having a will versus dying intestate

Compare will vs intestacy costs with this calculator. Estimate net savings from creating a will based on estate value and intestacy loss rate.

What this tool does

This calculator models the financial difference between establishing a will and dying without one. It estimates intestacy losses—assets lost to inefficient distribution or legal complications—plus costs from delayed probate processing, then subtracts the cost of creating a will to show the net outcome. The result represents a financial comparison for educational purposes, not a prediction. Estate value and the intestacy loss percentage are the primary drivers of the outcome. For example, a larger estate with higher assumed intestacy losses produces a larger estimated saving. The calculation does not account for tax implications, ongoing estate management costs, family circumstances, or variations in local legal processes. Results are estimates and serve to illustrate how will creation and intestacy costs compare.


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Formula Used
Estate value
Loss percent
Probate delay
Will cost

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Disclaimer

Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.

The Cost of Dying Without a Will

Intestacy — dying without a valid will — triggers statutory distribution rules that may not match wishes, delays estate settlement by months or years, produces legal fees for court-appointed administrators, and often results in asset loss through suboptimal distribution. Research suggests typical intestacy produces 3-8% asset loss compared to well-structured will plus probate delay costs of 1,000-5,000. Will setup costs typically 100-500 — massively positive expected value for anyone with meaningful estate.

Sources of Intestacy Loss

Statutory distribution may bypass unmarried partners entirely (common intestacy issue). Assets may transfer to unintended heirs (distant relatives over preferred beneficiaries). Property may be sold suboptimally to split between heirs. Court-appointed administrator fees 2-5% of estate. Probate delays 6-24 months during which assets may depreciate. Litigation between potential heirs in 10-15% of intestate estates. Specific tax consequences may be worse without planning. Combined impact typically 5-10% of estate value plus delay costs.

Worked Example for Moderate Estate

Will cost 250. Estate value 500,000. Intestacy loss 5%. Probate delay 2,000. Intestacy asset loss 25,000. Total intestacy cost 27,000. Will net saving 26,750. The 250 will investment produces over 100x return in expected value. Larger estates see proportionally larger intestacy losses. Smaller estates still benefit as probate delay cost is fixed and will avoids it regardless of asset size. Positive expected value for virtually any adult with assets.

What the Calculator Does Not Model

Specific jurisdictional differences in intestacy rules (huge variation). Complex family situations affecting intestacy outcomes significantly. Specific asset types with different intestacy treatment (retirement accounts often bypass probate regardless). Cost of will updates as life circumstances change. Legal complexity for business owners or international assets requiring more expensive wills. The calculator shows general framework; specific jurisdictional legal advice necessary for real planning.

Will Creation Options

Online will services (Trust and Will, LegalZoom): 100-200 for simple wills. Solicitor/attorney drafted: 200-800 for standard, 1,500-5,000 for complex estates. Joint wills (couples): 300-600 combined. Estate planning packages (will plus trust plus power of attorney): 800-3,000. Free options often available for specific situations (military, basic wills in some jurisdictions). Pick approach matching estate complexity — simple situations work with DIY/online; complex situations warrant attorney.

Example Scenario

Will at $250 on $500,000 estate saves 26,750.00 versus intestacy.

Inputs

Will Cost:$250
Estate Value:$500,000
Intestacy Loss:5%
Probate Delay Cost:$2,000
Expected Result26,750.00

This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.

Sources & Methodology

Methodology

The calculator computes the financial advantage of executing a will by modelling the costs associated with dying intestate against the upfront cost of will preparation. It multiplies your estate value by the intestacy loss percentage to estimate assets consumed through legal complexity, administrative inefficiency, or contested distribution. This loss figure is then added to any probate delay costs—expenses incurred while your estate remains unsettled. The calculator then subtracts your will cost from this total intestacy expense to arrive at the net saving. The model assumes a constant intestacy loss rate across all estate sizes and treats probate delay costs as fixed amounts. It does not account for variations in outcome based on family circumstances, jurisdiction-specific inheritance rules, investment returns during delays, or tax implications. Results represent a simplified comparison and should be reviewed alongside professional legal advice.

Frequently Asked Questions

Does intestacy really cost 5%?
Research varies — 3-10% typical range for estates going through intestacy. Specific circumstances drive actual loss: unmarried partners excluded entirely (potentially 100% loss of intended distribution), property sale for asset division (often 5-10% below market value), administrator fees (2-5%), tax inefficiencies. Use conservative 5% estimate; actual loss often higher.
When should I get a will?
Any adult with assets, dependents, or specific wishes about distribution. Particularly important for unmarried couples, blended families, business owners, anyone with specific beneficiary intentions differing from statutory default. Age threshold effectively 18+ with any assets. Wills should be reviewed and updated after major life events (marriage, divorce, children, inheritance).
Are online wills valid?
Yes in most jurisdictions if properly executed (witnesses, signatures according to local law). Online will services provide valid documents for simple situations. Complex estates (business ownership, international assets, blended families, trusts) warrant attorney-drafted wills ensuring all complexities addressed properly.
What about joint wills?
Couples often draft reciprocal wills leaving assets to spouse first then children. Can be joint document or separate wills with matching provisions. Typical cost 300-600 for couple versus 250 for single. Both options valid; attorney-drafted preferable for blended families or significant assets.

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