ISF 
Taxpayers
Only individuals whose net worth exceeds the threshold of 800,000 euros are subject to the ISF. The Corporations never are, whether companies, associations, groups or legal persons of public law.
Individuals tax resident in France are subject to the ISF because of all their property. Those who are domiciled abroad are due to their own property in France. In addition, some international tax rules set of charges.
Married couples Married couples, whatever their matrimonial regime, are subject to joint taxation under the ISF. The result is that married couples must purchase single statement that includes all their property, rights and taxable values as well as those of their minor children when they have the legal administration of their property.
However, each spouse is subject to the ISF in two cases:
- when they are separate property and not living under the same roof;
- when divorcing or separating body, and were allowed to have separate homes.
couples cohabiting
People living in cohabitation are subject to joint taxation, unless they are also married, which If they are imposed with their legal spouse.
partners bound by a PACS
partners bound by a PACS on 1 January of the tax year are subject to joint taxation to the ISF. As a result, the partners must subscribe to a single statement that includes all their property, rights and taxable values as well as those of younger children they have, one or the other, the legal administration of the property. Each partner must sign the declaration of ISF and is integral to its payment.
Rating Heritage taxable
All property whatever nature (movable or immovable property, rights or values) that you own are within the scope of the ISF.
The consistency of heritage is assessed at the date when the matter of taxation, that is to say on January 1st of the tax year.
variations that your assets may suffer between 1 January and the date of the declaration, including through purchases or sales are not taken into account in determining the tax base, unless the event has occurred subsequent retroactive (canceled sale, shares of inheritance, for example, etc. ...).
Previously, if the furniture: taxpayers subject to the ISF must include in their tax base to such tax, the value of their household furniture. In this regard, the administration admits of simplification measures and evaluation methods, including "overall assessment" which provides that the movable property may be assessed by a single digit, without its it is necessary to indicate the value and nature of each object. Thus, application of the furniture allowance of 5% applies only when other valuation methods were not used.
Evaluation of residency Main
Notwithstanding the principle that the market value of property you use as the owner is deemed to be value free of occupation, a 30% reduction is carried out on the market value when you are in the building owned by you, on 1 January of the tax year, as your principal residence.
Evaluation of second homes and other real estate
The market value of buildings constructed must be determined by the method of assessment by comparison that is to refer to prices recorded in transactions involving similar properties.
Other methods can be used in addition. These other methods include the assessment by the income adjustment or a previous value.
financial assets
Securities listed are evaluated on the last known or as the average over the last thirty preceding 1 January of each year. For each class of securities, you can choose which of the two references that led to the more moderate estimate of your portfolio.
Remember to calculate the 2 methods to get smarter (and thus one that plays down your wealth!) Other investments
Certain investments enjoy special valuation rules, others may be partial or total exemption (such as real professionals).
is the case of stock-options: the rights resulting from stock options granted have no heritage in the light of the ISF (so long as it is options, they are not reportable ). An option to subscribe for or purchase of shares shall not entitle its recipient, until it has actually been lifted, a right in a financial benefit hypothetical law is also transferable before exercising the option.
For non residents, financial investments (life insurance, stocks, ...) are not included in the tax base of the ISF!
Thus, it is mainly real estate and holdings of investments that are reportable under the ISF (with exceptions).
Good day
Life insurance can be a great way tax optimization in succession in the case of Expatriation . 
