How to compare TFSA vs RA for your next contribution

The problem

Forum threads and provider blogs often collapse the decision to “max TFSA first” or “RA for the tax break.” Those shortcuts ignore your remaining TFSA room, how much retirement contribution headroom you still have this year, whether employer contributions already used some of that headroom, and whether you need the money to stay accessible.

Spreadsheets help until tax-year limits change, carry-forward is unknown, or you forget a second TFSA at another provider. A comparison only works if it uses the same contribution amount and the same tax-year rules for both paths.

What to compare (same rand, both paths)

Planning estimates only, not SARS-verified. Refresh after each National Budget. Do not treat this table as a recommendation to choose either wrapper.

Inputs you need before the numbers mean anything

• Proposed contribution — the same amount you will compare on both paths (lump sum or monthly)
• TFSA room — current-year and lifetime contributions across every TFSA (not one provider’s “room left”)
• Remuneration / taxable income context — needed for Section 11F and a current-year tax estimate
• Personal and employer retirement contributions year-to-date — both use Section 11F headroom
• Date of birth — used for rebate-aware tax estimates where the calculator requires it
• Prior disallowed / carry-forward amounts — if unknown, deductible headroom and tax-effect outputs should stay incomplete

For current TFSA caps, see TFSA contribution limits for 2026/27 and tracking room across providers .

2026/27 reference figures

Confirm against current SARS material after Budget. The deductible amount is the least of the applicable statutory tests, after subtracting known claimable contributions — not “27.5% of salary” in isolation.

Worked example (illustrative only)

Suppose you want to place R20,000 before tax-year end. Remuneration is about R650,000. You have already contributed R30,000 to TFSAs this year (lifetime well under R500,000). Personal plus employer retirement contributions year-to-date are R80,000, and you have no known prior disallowed carry-forward.

• All to TFSA: R20,000 uses annual room (R46,000 − R30,000 = R16,000 left before this deposit — so R4,000 would sit outside usable room and may attract excess-contribution consequences). No income-tax deduction for the contribution itself. Funds stay in the more accessible wrapper.
• All to RA: The amount that still fits inside Section 11F headroom may produce an estimated current-year tax saving; any amount above remaining headroom is non-deductible for this comparison. Access is typically restricted. Retirement withdrawal tax is not reduced to one forecast number here.
• Split: Some investors use remaining TFSA room first, then direct the balance to RA (or the reverse) once they see both constraints — still a trade-off between access and current-year tax effect, not a ranked “best” answer.

Your real binding limiter may be TFSA annual room, TFSA lifetime room, the Section 11F percentage test, the R430,000 cap, or taxable-income ceiling. Run the same inputs through a calculator instead of copying this example.

Common mistakes

• Treating each TFSA provider’s “room left” as your SARS limit
• Ignoring employer retirement contributions when estimating Section 11F headroom
• Assuming a marginal tax rate alone equals a full current-year tax effect
• Comparing long-term projected balances without stating that fees, returns, and retirement withdrawal tax are incomplete
• Asking a tool which wrapper is “best” instead of which constraints bind for this contribution

Calculator vs saving the comparison in Libevyn

The free TFSA vs RA calculator gives one comparison from numbers you enter, before registration. Libevyn’s Scenarios flow uses the same kind of comparison with your maintained TFSA and retirement contribution totals so you can reopen and recalculate when salary, room, or the tax year changes.

Neither surface recommends a provider or allocation. Both are planning estimates — not SARS-verified assessments or financial advice.

Frequently asked questions

Should I always max my TFSA before contributing to an RA?

Not automatically. A TFSA offers tax-free growth and generally easier access, but an RA contribution may reduce current-year tax through Section 11F when you still have deduction headroom. Compare room, estimated tax effect, and access for your own numbers — there is no single ranking that fits everyone.

What is Section 11F headroom?

Section 11F limits how much you can deduct for qualifying retirement-fund contributions in a tax year. The deductible amount is the least of several statutory tests (including a percentage test and an annual rand cap). Employer and personal contributions both use that headroom. If you do not know prior carry-forward amounts, treat deductible estimates as incomplete until you confirm the figures.

Does contributing to an RA lock my money away forever?

Retirement contributions are typically far less accessible than TFSA savings under current rules. Access depends on fund type, age, and two-pot / preservation rules. A contribution comparison can flag access category differences; it should not claim exact retirement withdrawal tax or a single “locked until” date for every fund.

Do TFSA withdrawals restore contribution room?

No. Withdrawals do not restore lifetime TFSA contribution room. Annual and lifetime limits still apply across every TFSA you hold. See the TFSA limits guide for the current tax-year figures.

Can a calculator tell me the best split?

No. A useful comparison shows consequences and trade-offs for the same proposed amount under current rules — TFSA room used, estimated RA deduction and tax effect, and access differences. It should not recommend a provider, fund, or exact allocation.

Related

• Free TFSA vs RA calculator
• TFSA contribution limits for 2026/27
• How to track TFSA room across multiple providers
• How to track net worth across EE, RA, TFSA and property
• Libevyn pricing and features
• All guides