Why can two tax authorities disagree about whether you made money?
Because each one measures your trade in its own currency, at both ends. Israel converts what you paid at the rate on the purchase day and what you received at the rate on the sale day4. Your home country does the same in its currency1.
As an oleh you sit across both rulers, and they can disagree about whether there was a gain at all. A lifelong Israeli almost never meets this. One currency in, one currency out, one authority. You arrived with a brokerage account, a home-country filing history and a head that still prices things in dollars, pounds or rand, and now a second authority computes the same sale on a different ruler and taxes its own answer. Nobody reconciles the two for you.
General information, not advice
How does the Israeli side measure the trade?
In shekels, at both ends, and then it taxes only the real part. Your cost is fixed in shekels at the exchange rate on the purchase day, your proceeds are fixed in shekels at the rate on the sale day, and the difference is the nominal shekel result. Israel then strips out the inflationary component and applies מס הכנסה (mas hachnasa) at 25% for an individual to what is left4.
The detail that decides your case is which index does the stripping. For an ordinary shekel-denominated asset it is the מדד (madad), the Consumer Price Index. For an asset denominated in or linked to מטבע חוץ (matbea chutz), the change in the exchange rate takes that role instead4. The consequence is not intuitive and is worth reading twice: when the shekel weakens over your holding period, the currency part of the move is removed from the taxable gain rather than added to it.
That relief has a floor. The inflationary component does not run negative, so when the shekel strengthens there is nothing to strip out and Israel simply taxes the shekel-measured result, whatever your foreign-currency statement says4. The rate you use for each leg is the representative rate the Bank of Israel publishes on every foreign-currency business day, the שער יציג (sha'ar yatzig), which the Bank itself describes as an indicator with no obligatory status under law3.
How does the home-country side measure the same trade?
On exactly the same principle, in its own currency, with no reference to Israel. For a US person the dollar is the functional currency and each item is translated at the rate prevailing when it is received, paid or accrued1, using the spot rate for a specific transaction2. HMRC states the rule even more bluntly: each amount of foreign currency is converted to sterling when incurred or received, and you may not compute the gain in the foreign currency and convert the answer at the end11.
So both sides do the honest thing, and that is precisely why they diverge. Two correct computations of one sale, on two rulers, produce two different numbers, and in the sharp cases they produce two different signs.
What does the treaty do about the gap?
Less than olim expect. The US-Israel income tax convention allocates taxing rights and relieves double taxation through credit mechanisms9; it does not tell either country which currency to measure in, and it does not convert one country's answer into the other's. Relief on the US side runs through the foreign tax credit, which you can claim where you paid foreign tax and are subject to US tax on the same income7.
Read that condition carefully, because it is where the currency problem bites. If Israel taxes a shekel gain on a trade your US return shows as a loss, there is no US tax on that income for the credit to sit against. The credit does not vanish, but it cannot help you on that trade, and the limitation rules decide whether it helps you anywhere7.
Which of the four asset shapes are you holding?
The answer changes completely by shape, and most olim hold three of the four at once without noticing that they behave differently.
| Shape | What Israel measures | Where the inversion shows up |
|---|---|---|
| Listed foreign security, priced in foreign currency | Shekel cost and shekel proceeds, with the exchange-rate change acting as the index4 | Shekel strengthens: a real gain on your statement can be a shekel-measured loss here |
| Foreign-currency bank deposit | The ריבית (ribit) is income; the currency movement on the principal is not computed like a security sale | The shape most worth confirming for your own account before you move a large balance |
| Cash you simply converted | Nothing was sold in the securities sense, but the conversion fixes a shekel value | UK olim especially: currency itself is a chargeable asset in the UK system10 |
| Shekel-denominated asset, held by someone who thinks in dollars | A clean shekel gain, indexed to the madad, taxable from your first month here4 | The headline case: your home-country statement shows a loss and Israel still taxes a gain |
One more shape question decides your timing rather than your arithmetic. A new resident is exempt from Israeli tax on foreign-source income and on assets held abroad for ten years from the aliyah date, and from 1 January 2026 that income is still exempt for the affected years but has to be reported5. So for foreign assets the shekel computation mostly switches on in year eleven. For an Israeli, shekel-denominated asset there is no window at all: it is Israeli-source from month one.
What does one position look like across three exchange-rate paths?
Take a US-citizen oleh past the ten-year window who buys a shekel-denominated Israeli holding for ₪100,000 when the representative rate is ₪3.60 to the dollar, a dollar cost of $27,778. Years later it is sold for ₪115,000, and the madad rose 3% over the holding period, so the inflationary component is ₪3,000, the real gain is ₪12,000 and the Israeli tax at 25% is ₪3,0004. Now change nothing except the exchange rate on the sale day.
| Rate on sale day | Home-currency (USD) result | Shekel-measured result | Israeli tax due | Home-country credit against it? |
|---|---|---|---|---|
| ₪4.30 (shekel weakened) | $26,744 out against $27,778 in: a loss of $1,034 | Nominal ₪15,000, real ₪12,000 | ₪3,000, about $698 at that rate | Not on this trade: no US tax arises on a loss for the credit to offset7 |
| ₪3.60 (unchanged) | $31,944 out against $27,778 in: a gain of $4,167 | Nominal ₪15,000, real ₪12,000 | ₪3,000, about $833 at that rate | Possible, subject to the sourcing and limitation rules7 |
| ₪3.20 (shekel strengthened) | $35,938 out against $27,778 in: a gain of $8,160 | Nominal ₪15,000, real ₪12,000 | ₪3,000, about $938 at that rate | More room for it, because there is more US tax on the same trade7 |
Illustrative figures, chosen for clean arithmetic rather than as any forecast of the rate. The point survives any numbers you put in: the Israeli bill is identical in all three rows, because Israel never looked at the dollar. Your home-country result swings from a $1,034 loss to an $8,160 gain, and only the currency moved.
Now run it the other way, on a dollar-denominated holding. You bought 100 shares at $200, so $20,000, when the rate was ₪3.90, a shekel cost of ₪78,000. You sell at $215, so $21,500, when the rate has fallen to ₪3.30, shekel proceeds of ₪70,950. Your broker reports a $1,500 gain. The Israeli computation reports a capital loss of ₪7,050, because the shekel strengthened and there is no negative inflationary component to change that4. Same trade, opposite signs, both correct.
What happens to loss harvesting?
It stops being reliable, which is a problem if you learned the habit at home. Selling a losing position to offset a gain assumes both sides of the pair are losses and gains in the same measure. Across two currencies they may not be. A dollar loss can be a shekel gain, and a shekel loss can be invisible on your US or UK return, so the offset you planned may not exist in the system where you needed it41.
There is a quieter version of the same problem that costs olim real money. If you sell at a loss in Israeli terms while your home country sees a gain, you pay home-country tax with no Israeli tax to credit and no Israeli offset to use. Harvesting is not useless here, it is simply a two-ledger exercise, and it has to be planned in the currency where the offset is actually needed rather than the one your statement happens to display.
US persons: does the fund layer come before the currency layer?
Yes, and this is the ordering that catches people. If the position is a pooled non-US fund, an Israeli קרן נאמנות (keren ne'emanut) or a non-US exchange-traded fund, then for a US citizen or green-card holder it is a Passive Foreign Investment Company, and a US shareholder of a PFIC files Form 86216. The default PFIC regime is deliberately unfavourable, spreading the gain across your holding period and adding an interest charge, and it applies regardless of which currency made the gain look good.
So the sequence is: is it pooled and non-US, then how is it measured. A shekel-versus-dollar argument about a holding that should not be in a US person's taxable account at all is an argument about the second problem. UK, Canadian, South African, French and Australian olim do not carry the PFIC rule and can go straight to the currency question. Meidahon covers the PFIC mechanics in a dedicated article.
What newcomers get wrong
- Converting the answer instead of the legs. Computing the gain in dollars and multiplying by today's rate is the one method both authorities reject11. Each leg converts on its own date.
- Assuming the broker statement is the tax answer. A foreign brokerage reports in its own currency and withholds nothing for Israel. The statement is an input, not a computation.
- Treating the ten-year exemption as covering everything. It covers foreign-source income and assets held abroad, not an Israeli shekel-denominated holding, and since 1 January 2026 the exempt years still carry a reporting duty5.
- Not recording the rate on the purchase day. Reconstructing it years later is possible from the Bank of Israel series3, but it is far more work than writing two numbers down at the time.
- Expecting the credit to be automatic. The foreign tax credit needs US tax on the same income to offset7, which the currency mismatch can quietly remove.
So how do you decide when to sell?
Price the position in both currencies at both dates before the order goes in, not after. This is a four-number exercise and it takes minutes.
- Pull the purchase-day rate from the Bank of Israel representative-rate series and write down the shekel cost alongside the foreign-currency cost3.
- Price today's exit in both currencies using today's representative rate, so you have a shekel result and a home-currency result side by side.
- Ask which authority is live for this asset. Israeli-source assets are taxable from month one; foreign assets sit under the new-resident exemption until year eleven, with reporting from 1 January 20265.
- For US persons, check the fund layer before the currency layer by asking whether the holding is pooled and non-US6.
- Check whether the sides disagree in sign. If one shows a gain and the other a loss, that is the trade to take to a cross-border adviser, before you sell rather than at filing time when the date is fixed and nothing can be changed.
Knowledge Check
You are a US-citizen oleh past the ten-year window. You bought a shekel-denominated Israeli holding for ₪100,000 when the rate was ₪3.60, and you sell it for ₪115,000 when the rate is ₪4.30. What is the position?
Israel computes a capital gain in shekels, converting the purchase at the exchange rate on the purchase day and the sale at the rate on the sale day, then taxes the real gain after the inflationary component at 25% for an individual. Your home country runs the same exercise in its own currency and neither imports the other's answer, so the same trade can be a gain in one system and a loss in the other. For an asset denominated in foreign currency, Israel treats the change in the exchange rate as the index, so a weakening shekel is stripped out of the taxable gain, but that relief never runs negative. A shekel-denominated holding produces the opposite case: a taxable Israeli gain while your dollar statement shows a loss, and then there is no home-country tax on that trade for a foreign tax credit to offset. New residents are exempt from Israeli tax on foreign-source income and assets abroad for ten years from aliyah, with a reporting duty from 1 January 2026, so for foreign holdings the shekel computation usually starts in year eleven.
Yes, most clearly on a shekel-denominated Israeli holding when the shekel has weakened against your home currency. Israel measures the shekel cost against the shekel proceeds and taxes the real gain that remains after the inflationary component. Your foreign-currency statement can show a loss on the identical sale, because it converts both legs into a currency Israel never looked at. Both computations are correct on their own ruler.
For a security denominated in or linked to foreign currency, the change in the exchange rate takes the place of the Consumer Price Index as the inflationary index, so the currency part of the move is stripped out of the taxable real gain rather than taxed. The relief has a floor: the inflationary component does not run negative. When the shekel strengthens instead, Israel simply taxes the shekel-measured result of the trade.
The Israeli computation runs on the representative rate the Bank of Israel publishes on each foreign-currency business day, taken on the purchase date and again on the sale date. The Bank describes the representative rate as an indicator of the exchange rate in use with no obligatory status under law, so keep your own record of the rate you applied. On the US side, translate each item at the rate prevailing when you receive, pay or accrue it.
For foreign assets, largely yes: a new resident is exempt from Israeli tax on foreign-source income and on assets held abroad for ten years from the aliyah date, so the shekel computation usually becomes live in year eleven. Two caveats matter. From 1 January 2026 the exempt income still has to be reported for the affected years. And an Israeli, shekel-denominated asset is Israeli-source, so it is taxable from your first month here with no window at all.
Not reliably, and this is where an imported habit costs money. A loss on your foreign-currency broker statement may not be a loss in the Israeli computation, so it can offset nothing here, and a shekel loss may not appear on your home-country return at all. Plan the harvest in the system where you actually need the offset, and check the sign of the result on both rulers before you place the order.
Before. If the holding is a pooled non-US fund, an Israeli keren neemanut or a non-US exchange-traded fund, it is a Passive Foreign Investment Company for a US citizen or green-card holder, and a US shareholder of a PFIC files Form 8621. The default regime spreads the gain over the holding period and adds an interest charge regardless of which currency made the result look attractive. Settle the fund question first, then argue about measurement.
No. The convention allocates taxing rights and relieves double taxation through credit mechanisms, but it does not tell either country which currency to measure in and it does not convert one answer into the other. Relief on the US side runs through the foreign tax credit, which requires US tax on the same income to offset. When the currency mismatch turns your US result into a loss, there is no US tax on that trade for the credit to reduce.
Once you are non-resident under the UK rules you do not pay UK tax on foreign income, so for most UK olim the double measurement ends rather than continues. Two habits are still worth keeping. HMRC converts each leg into sterling on its own date and rejects computing the gain in foreign currency and converting the result, which is the same discipline Israel applies in shekels. And in the UK system currency other than sterling is itself a chargeable asset, so check your position for the year you left before assuming a clean break.