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A prenuptial agreement asset calculator helps couples inventory and categorize their pre-marriage assets, debts, and expected inheritances to inform a fair prenuptial agreement. It distinguishes between separate property and what might become marital property.

Formula

Net Separate Property = Total Pre-Marriage Assets – Pre-Marriage Debts
A_s
Separate Assets ($) — Total value of pre-marriage assets
D_s
Separate Debts ($) — Total pre-marriage debts
NSP
Net Separate Property ($) — Assets minus debts brought into the marriage

Guida passo passo

  1. 1List each partner’s pre-marriage assets: real estate, investments, retirement, business interests
  2. 2List each partner’s pre-marriage debts: student loans, credit cards, mortgages
  3. 3Calculate net separate property for each partner
  4. 4Identify assets likely to appreciate during marriage and decide how growth is treated

Esempi risolti

Ingresso
Partner A: $300,000 home, $50,000 investments, $80,000 student loans
Risultato
Net separate property: $270,000
Ingresso
Partner B: $20,000 savings, $500,000 expected inheritance, $30,000 car loan
Risultato
Net separate property: $490,000 (including future inheritance protection)

Errori comuni da evitare

  • Not disclosing all assets — this can invalidate the entire prenup
  • Failing to account for appreciation of separate property during marriage
  • Not updating the prenup as circumstances change (postnuptial amendment)

Domande frequenti

Are prenups enforceable?

Yes, in all 50 states, provided both parties made full financial disclosure, had independent legal counsel (or waived it), and signed voluntarily without duress.

How much does a prenup cost?

Typically $2,500–$10,000 total for both attorneys, depending on complexity. Each party should have their own attorney for enforceability.

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