US freelancer: Solo 401(k) or SEP IRA for retirement?
For: Single US freelancer (38), renter, choosing between a Solo 401(k) and a SEP IRA
For a freelancer with uneven income, the better retirement account often depends less on headline limits and more on whether you can save steadily through the.
For: Single Austin tech worker (35), renter, laid off mid-career while pursuing FIRE
An Austin-based single tech worker compares keeping an aggressive FIRE plan, resetting the retirement age after a long job search, or rebuilding cash first.
A public-sector pension buyback can be worth doing, but only if the higher pension floor does not leave you too short of flexible cash. In this scenario, buyback-first improves the guaranteed-income side of the plan, while TFSA-first keeps more accessible money and only wins if the worker can keep saving more.
The starting point is a 42-year-old Canadian public-sector worker, either single or in a one-income household, with about C$85,000 already saved and a chance to buy back prior pensionable service. The core tension is familiar: the pension quote may look sensible on paper, but life between age 42 and 65 still includes job risk, family support, vehicles, repairs, health costs, and the need for an emergency reserve.
This page compares a C$30,000 full buyback, a C$15,000 partial buyback, and a TFSA-first path. The goal is not to replace a plan quote or tax review. It is to help a Canadian public-sector worker compare three real trade-offs: a larger pension floor, more TFSA flexibility, or a partial buyback that preserves more cash.
C$5,050-C$5,350/month from employer pension plus CPP/OAS
Retirement spending tested
C$5,800-C$7,600/month
All figures are in today's dollars. The scenario uses real return assumptions, so future amounts are shown in current purchasing power rather than inflated future prices.
At a glance, the buyback-first path buys a stronger income floor, TFSA-first buys flexibility, and the split path gives up purity for lower regret. The important catch is that TFSA-first saves about C$385/month more during working years than buyback-first, so its stronger liquid outcome is not caused by avoiding the buyback alone.
The base-case comparison is the clearest:
Path
What changes
Retirement result
Buyback first
Pays C$30,000 at age 42 and rebuilds liquidity through age 45
About C$423k at retirement and C$624k at age 90
TFSA first
Keeps cash invested and accepts a lower pension-income proxy
About C$636k at retirement and C$726k at age 90
Split
Pays C$15,000 and keeps more flexible capital than the full buyback
About C$528k at retirement and C$647k at age 90
That gap comes partly from compounding. By retirement, the base TFSA-first path has earned about C$226k of investment growth before withdrawals begin, compared with about C$140k for buyback-first and C$183k for the split path. Cumulative interest is not the same as money left over; some later growth helps pay retirement spending and care costs.
Preserves the target buffer, but early liquidity is tightest after the full buyback.
Pessimistic · Buyback
C$1,100/mo
Planned C$5,800/mo; buffer-safe C$5,898/mo
C$97k
Still positive, with little room above planned spending.
Optimistic · Buyback
C$1,100/mo
Planned C$6,800/mo; buffer-safe C$6,834/mo
C$202k
Higher spending nearly uses the extra capacity.
Base · TFSA first
C$1,485/mo
Planned C$6,300/mo; buffer-safe C$6,938/mo
C$226k
Best base-case liquid result, but it depends on a higher saving habit.
Pessimistic · TFSA
C$1,485/mo
Planned C$6,300/mo; buffer-safe C$6,342/mo
C$156k
Flexible cash helps, though the margin is narrow.
Optimistic · TFSA
C$1,485/mo
Planned C$7,600/mo; buffer-safe C$7,655/mo
C$320k
Works only because growth and saving effort are both strong.
Base · Split
C$1,285/mo
Planned C$6,100/mo; buffer-safe C$6,615/mo
C$183k
A compromise with a meaningful buffer and less early cash strain.
Pessimistic · Split
C$1,285/mo
Planned C$6,100/mo; buffer-safe C$6,113/mo
C$127k
Survives, but almost every safe dollar is already assigned.
Optimistic · Split
C$1,285/mo
Planned C$7,100/mo; buffer-safe C$7,197/mo
C$259k
Higher spending remains just inside the buffer target.
The estimated buffer-safe retirement budget is the monthly amount each path can support while preserving a five-year cushion. A stricter withdrawal-only view is lower: about C$2.0k-C$2.6k/month for buyback-first, C$2.4k-C$3.8k/month for TFSA-first, and C$2.0k-C$3.1k/month for split. That difference is why the employer pension plus CPP/OAS income floor matters so much.
The liquid capital figures are investable savings only. They do not include the actuarial value of the defined-benefit pension. To interpret safe spending and buffer logic, see Reading your results.
This comparison uses three practical decision tests rather than one universal rule:
Question
Why it matters
Does the buyback still leave a real emergency reserve?
Liquidity is hard to recover once cash has moved into pension service.
How much retirement income does the buyback actually add?
Your own plan quote controls the real answer; a generic formula cannot.
What happens if tenure changes?
A worker who leaves public employment early may value accessible TFSA assets more than a neat service calculation.
During the working years, the saving effort rises with age rather than staying flat. Buyback-first starts with the lowest liquid saving rate because cash is going into pension service and liquidity rebuilding. TFSA-first requires the highest monthly saving habit to produce its stronger flexible balance, while the split path sits between the two.
Those bands matter because the decision is not just "buy pension service or invest." The worker also has to get through ordinary midlife costs: a vehicle replacement, family support or travel, a home repair or moving reset, dental and health reserves, and later-life accessibility and care costs. Buyback-first also carries a short liquidity rebuild period, while the split path uses a smaller version of the same pressure.
The buyback-first path assumes the worker has a credible plan quote, expects to stay with the employer, and wants a higher guaranteed or formula-based retirement income floor. It spends C$30,000 at age 42, which sits inside a typical central planning range for buying back one to three years of prior service.
The trade-off is immediate: the worker has less flexible capital and needs a few years to rebuild liquidity. This can still be rational if the buyback meaningfully increases lifetime pension, survivor benefits, or unreduced-retirement eligibility. It is weaker if the worker would need to borrow, empty an emergency fund, or decide before seeing the plan administrator's quote.
The TFSA-first path keeps the same starting savings invested and avoids the up-front buyback payment. It also includes an unpaid-leave or career-flexibility cost in the late 40s, because this is the sort of event that makes accessible savings valuable.
The retirement income floor is lower in this version: the employer-pension-plus-CPP/OAS proxy is C$5,050/month, compared with C$5,350/month for buyback-first. That does not mean TFSA-first is worse; it means the value has shifted from formula-based pension income into portable, tax-free, flexible savings. This path looks better when the worker may leave the employer, relocate, support family, deal with health costs, or wait for a better quote.
The split path pays a C$15,000 partial-buyback cost and keeps more money available than the full buyback. It is not mathematically pure, but it is realistic for a worker who wants to reduce regret on both sides: do not ignore a valuable service purchase, and do not sacrifice every flexible dollar to get it.
This approach is especially useful when the plan permits installment or partial strategies, when the worker wants to maintain a three-to-six-month emergency reserve, or when partner income, housing, or health uncertainty makes a full commitment feel too tight.
In retirement, the plan is deliberately simple. It combines employer pension, CPP, and OAS into one monthly income proxy for readability, then tests spending from C$5,800/month to C$7,600/month depending on the variant. If your CPP or OAS timing differs, separate those amounts before trusting the result.
Start by replacing the modeled buyback cost with your actual quote. The range in this page is only an assumption; your cost may depend on salary history, age, service type, plan contribution rates, interest, past service pension adjustment rules, and whether payment is made by cash, RRSP transfer, installment, or a mix.
Then adjust the pension-income amount, not just the one-time cost. Ask your plan administrator for the estimated pension with and without the buyback, the impact on earliest unreduced retirement, survivor benefits, bridge benefits, indexing, and any 35-year service cap. A buyback that adds two credited years but does not change your likely retirement date may feel different from one that lets you retire earlier without a penalty.
Finally, stress-test liquidity. Keep a separate emergency reserve, model any expected home repairs, vehicle replacement, family help, or unpaid leave, and lower the return assumption if most of the TFSA will sit in cash or GICs rather than a long-term balanced portfolio.
Plan rules are not interchangeable. Federal public-service documents are used as a clear public reference point, but provincial, municipal, healthcare, education, Crown corporation, and university plans can differ materially.
A buyback can affect RRSP room. Post-1989 service buybacks may involve a past service pension adjustment, and CRA certification can matter.
TFSA withdrawals stay flexible. CRA guidance says withdrawals generally create new contribution room in the following calendar year and TFSA income or withdrawals are not included in federal income-tested benefit calculations.
CPP and OAS are separate from the employer pension. This scenario combines them into one retirement-income line for readability, but your CPP/OAS timing and amount should be modeled separately if they differ from the default.
This scenario is an educational model, not personal pension, tax, legal, or investment advice. Service buyback rules are plan-specific; verify the quote, tax treatment, PSPA impact, eligibility, and retirement-date effect with your own pension administrator and qualified adviser.