Goldman Sachs economists see the tax bill adding 0.3 percentage points to GDP growth in 2018 and 2019 while JP Morgan forecasts a similar gain of 0.3 percentage points next year and 0.2 percentage points the year after.

Goldman’s analysts add that federal spending, which is likely to grow more quickly next year than it has recently, will bring the total fiscal boost to around 0.6 percentage points for 2018 and 0.4 percentage points in 2019.

Both banks see deficits likely rising above $1 trillion, or about 5 percent of GDP, in 2019.