The federal government almost doubled the amount that Canadians can contribute to tax-free savings accounts Tuesday, a widely hinted bit of populism that was at once less than expected but also the main vote-grabbing goodie on offer for Canadians soon to head to the polls.

Tuesday's federal budget raises the amount Canadians can contribute to tax-free savings accounts﻿ each year to $10,000 effective immediately. That's up from the most recent limit of $5,500 but less than the $11,000 doubling that had been floated in recent months.

Unlike other savings vehicles such as RRSPs, contributions to the accounts are after-tax funds, but can grow — tax free — indefinitely. Nearly doubling the limit is great news for savers and investors, but it also represents foregone future tax revenue for governments.

A lot, in fact.

By the government's own estimates, the extra room in the accounts will cost government coffers $85 million in the current fiscal year, jumping to $360 million annually by 2019. Five years on, that's $1.1 billion in foregone revenue.

RRIF changes

The government also tinkered with the amount that seniors are obliged to withdraw from their retirement funds. By age 71, seniors must convert any RRSPs into a registered retirement income fund, or RRIF, which draws out money each year — money that must be taxed. Seniors groups such as CARP had lobbied the government to scrap the minimum withdrawals entirely, because people are living longer and sometimes running out of savings.

The government stopped short of that, but did lower the minimum annual requirements. Under the old rules, a 71-year-old would have to withdraw 7.38 per cent of his or her RRIF in the first year, escalating all the way to 20 per cent by age 94. Under the new rules outlined in the budget, those limits have been reduced to 5.28 per cent to start, and lowered to 18.79 per cent by age 94.

The government says the new rules will allow seniors to preserve 50 per cent more capital over the life of their RRIF, at a cost of $670 million in foregone tax revenue over the next five years.

There were a few other tax-cuts introduced: