Tax cuts create simultaneously a lack of tax receipts and more savings ready to be changed into public bonds and compensate this shortage of tax revenue. A part of tax resources is replaced by borrowing and those who are enjoying tax cuts are also receiving interest from government. The consumption gain that can be obtained is small compared with the loss of tax receipts. Tax cuts have played an important role in the rise in public debt for twenty years. The first section analyses the link between tax cuts and public debt in France through national accounts and the second section presents a stock-flow consistent (SFC) model to examine this relation.