Your 401(k), IRA and Social Security, in one Canadian retirement plan.

Yes. Optiml has a place for a Traditional IRA, Traditional 401(k), Roth IRA and Roth 401(k) for each spouse, plus US Social Security. Enter your balances in Canadian dollars and Optiml plans them alongside your RRSP, TFSA, pensions, CPP and OAS, then works out which account to draw from each year.

A withdrawal from a Traditional 401(k) or IRA is fully taxable in Canada. The US also keeps 15% at source, the treaty rate for a Canadian resident, and Canada gives you a foreign tax credit for it, so the same dollar is not taxed twice. Optiml shows the US tax on its own line and applies the credit for you. A withdrawal before 59½ also carries a 10% US penalty, so when Optiml chooses your withdrawals it waits until you are 60.

In Optiml's optimized strategies, taxable withdrawals come from your RRSP or RRIF first, then your Traditional 401(k), then your Traditional IRA, because the 15% US tax is only fully recovered when your Canadian tax on that money is at least 15%. On the tax-free side, Roth accounts are spent before your TFSA. Required minimum distributions are always taken, and in a Traditional plan you can set your own order.

Under the Canada-US tax treaty, Roth IRA and Roth 401(k) withdrawals are tax-free for a Canadian resident, as long as the account keeps its treaty protection. A contribution to a Roth IRA made after you moved to Canada breaks that protection. Optiml asks about it, and if it applies, your plan taxes the Roth's growth each year the way CRA does.

US Social Security paid to a Canadian resident is taxed only in Canada. 15% of the benefit is exempt and the other 85% is taxed as income, with no US tax withheld. The taxable part can be split with your spouse from age 65, and the full benefit counts toward the OAS clawback. Optiml applies all of it in your plan.

Required minimum distributions on a Traditional IRA or 401(k) start at age 73, or 75 if you were born in 1960 or later. Optiml takes them automatically from your date of birth, counts them as taxable income and shows each year's amount on its own row. Roth accounts have no required minimum distributions for the original owner.

Under the Canada-US tax treaty, regular pension payments from a Traditional IRA or 401(k) to a Canadian resident carry a 15% US withholding tax, and that is the final US tax on them. Optiml applies it to each withdrawal, shows it on its own US Taxes line, and credits it against your Canadian tax through the foreign tax credit, first federal and then provincial.

A Traditional IRA or 401(k) withdrawal before age 59½ carries an extra 10% US penalty, and unlike the 15% withholding, Canada gives no credit for it. When Optiml chooses your withdrawals, it never draws from a US account before age 60, so optimized plans stay clear of the penalty.

Yes. The OAS clawback and the GIS are measured on net income before the treaty deduction, so your full US Social Security benefit counts, including the exempt 15%. Optiml measures it the same way, and its strategies, including the OAS Clawback Reducer, plan your withdrawals with it in view.

Yes. Under CRA's rules, the taxable 85% of US Social Security is foreign pension income: it counts toward the pension income amount at any age and can be split with your spouse from age 65. The exempt 15% never qualifies. Optiml applies pension splitting for you.

US accounts roll over to the surviving spouse with no tax on the transfer, the same way an RRSP does in Canada. Optiml combines both Traditional accounts into the survivor's Traditional IRA and both Roth accounts into the survivor's Roth IRA, and from then on the survivor's age sets the required minimum distributions.

A Roth 401(k) is part of an employer 401(k) plan, which CRA treats as an employee benefit plan whose growth is not taxed in Canada year by year. Optiml treats it as protected: it grows tax-free and withdrawals are tax-free in Canada, with no US tax withheld and no required minimum distributions for the original owner.