The Sole Prop 3 Understanding Financial Planning – The Advantages of a Retirement Annuity (RA) vs Not Having an RA

When you’re a sole proprietor, every rand you earn forms part of your taxable income. Unlike a registered company (Pty Ltd), you don’t pay yourself a salary—you are the business.

This makes retirement planning and tax planning deeply interconnected.

One of the most powerful tools available to natural persons (individuals) is a Retirement Annuity (RA). Not only does an RA help build long-term wealth, but it also reduces your current tax burden—often dramatically.

In this article, we:

✅ Compare the financial impact of having an RA versus not having an RA✅ Analyse the future value and present value of RA contributions✅ Include a tax comparison if you forfeit the RA✅ Calculate how much tax you effectively “lose” when you don’t contribute✅ Provide a rate of return comparison between keeping vs forfeiting the RA

1. Scenario Assumptions

To deliver clear, practical numbers, we use the following assumptions:

Variable	Value
Initial RA Contribution	R7,500 per year
Yearly Escalation	10% per year
Investment Term	20 years
Expected RA Growth Rate	8% per year
Marginal Tax Rate	36% (typical middle/upper-middle SA bracket)
RA Tax Deductibility	100% deductible

2. RA Contribution Projection (20 Years)

Each year, the contribution increases by 10%.

Year-by-Year Contributions

Year	Contribution (R)
1	7,500
2	8,250
3	9,075
4	9,982
5	10,981
10	19,396
15	31,207
20	50,151

Total nominal contributions over 20 years:

Total Contributions = R288,923

3. Future Value (FV) of the RA After 20 Years

We apply 8% annual investment growth plus the 10% escalating contributions.

Using future value of a growing annuity:

FV=C×(1+r)n−(1+g)nr−gFV = C \times \frac{(1 + r)^n - (1 + g)^n}{r - g}FV=C×r−g(1+r)n−(1+g)n​

Where:C = first payment (7,500)r = growth rate (8% = 0.08)g = escalation rate (10% = 0.10)n = 20 years

Because g > r, we must invert the formula:

FV=C×(1+g)n−(1+r)ng−rFV = C \times \frac{(1+g)^n - (1+r)^n}{g - r}FV=C×g−r(1+g)n−(1+r)n​

Compute:

(1+g)^20 = 1.10^20 ≈ 6.727(1+r)^20 = 1.08^20 ≈ 4.661

FV=7,500×6.727−4.6610.10−0.08FV = 7,500 \times \frac{6.727 - 4.661}{0.10 - 0.08}FV=7,500×0.10−0.086.727−4.661​FV=7,500×2.0660.02FV = 7,500 \times \frac{2.066}{0.02}FV=7,500×0.022.066​FV≈7,500×103.3=R774,750FV \approx 7,500 \times 103.3 = R774,750FV≈7,500×103.3=R774,750

**✔ FINAL RA FUTURE VALUE: R 774,750

4. Present Value (PV) of Contributions

Discounting at the investment return rate (8%):

PV=7,500×1−(1+g1+r)nr−gPV = 7,500 \times \frac{1 - \left(\frac{1+g}{1+r}\right)^n}{r - g}PV=7,500×r−g1−(1+r1+g​)n​PV=7,500×1−(1.10/1.08)200.08−0.10PV = 7,500 \times \frac{1 - (1.10/1.08)^{20}}{0.08 - 0.10}PV=7,500×0.08−0.101−(1.10/1.08)20​

Compute ratio:

1.10/1.08 = 1.0185181.018518^20 ≈ 1.438

PV=7,500×1−1.438−0.02PV = 7,500 \times \frac{1 - 1.438}{ -0.02}PV=7,500×−0.021−1.438​PV=7,500×−0.438−0.02PV = 7,500 \times \frac{-0.438}{ -0.02}PV=7,500×−0.02−0.438​PV=7,500×21.9=R164,250PV = 7,500 \times 21.9 = R164,250PV=7,500×21.9=R164,250

✔ PRESENT VALUE OF ALL CONTRIBUTIONS: R164,250

5. Tax Savings From Having the RA

RA contributions are fully tax-deductible, meaning they reduce taxable income.

Tax Saving Per Year (Example)

Year 1 RA = R7,500Tax rate = 36%

Tax Saving=7,500×0.36=R2,700Tax\ Saving = 7,500 \times 0.36 = R2,700Tax Saving=7,500×0.36=R2,700

Repeat this for 20 years with escalating contributions.

Total Tax Avoided Over 20 Years

Total contributions = R288,923

Total Tax Saved=288,923×36%=R104,012Total\ Tax\ Saved = 288,923 \times 36\% = R104,012Total Tax Saved=288,923×36%=R104,012

✔ TOTAL TAX SAVED BY HAVING AN RA: R104,012

6. Scenario Comparison

Scenario A: You Keep the RA

• Total contributions: R288,923

• Future value: R774,750

• Tax saved: R104,012

Net effective cost of the RA:

Net Cost=Total Contributions−Tax SavedNet\ Cost = Total\ Contributions - Tax\ SavedNet Cost=Total Contributions−Tax SavedNet Cost=288,923−104,012=184,911Net\ Cost = 288,923 - 104,012 = 184,911Net Cost=288,923−104,012=184,911

For R184,911 of real out-of-pocket cost, you end up with R774,750.

Scenario B: You Forfeit the RA

If you do not invest in the RA:

• You pay R104,012 extra in tax over 20 years

• You invest nothing

• You earn nothing

• You retire with R0 from this stream

Even if you tried to invest the after-tax portion instead, you'd only have:

Investment =Contribution after 36%taxInvestment\ = Contribution\ after\ 36\% taxInvestment =Contribution after 36%tax

Year 1 example:

7,500×(1−0.36)=4,8007,500 \times (1 - 0.36) = 4,8007,500×(1−0.36)=4,800

Future value of this "after-tax" investing:

FV=4,800×(1.10)20−(1.08)200.10−0.08FV = 4,800 \times \frac{(1.10)^20 - (1.08)^20}{0.10 - 0.08}FV=4,800×0.10−0.08(1.10)20−(1.08)20​FV=4,800×2.0660.02=4,800×103.3=R495,840FV = 4,800 \times \frac{2.066}{0.02} = 4,800 \times 103.3 = R495,840FV=4,800×0.022.066​=4,800×103.3=R495,840

✔ FUTURE VALUE IF YOU FORFEIT RA: R495,840

vs

✔ FUTURE VALUE WITH RA: R774,750

7. Rate of Return Comparison

We compare effective yield after tax.

Scenario A: Return on Keeping RA

Return=FV−Net CostNet CostReturn = \frac{FV - Net\ Cost}{Net\ Cost}Return=Net CostFV−Net Cost​Return=774,750−184,911184,911=3.19Return = \frac{774,750 - 184,911}{184,911} = 3.19Return=184,911774,750−184,911​=3.19

Rate of return = 319% over 20 yrs = 7.4% real annual return (after tax benefits)

Scenario B: Return on Forfeiting RA

Return=495,840−288,923288,923Return = \frac{495,840 - 288,923}{288,923}Return=288,923495,840−288,923​Return=0.715Return = 0.715Return=0.715

Rate of return = 71% total = 2.7% real annual return

8. Final Comparison Table

Metric	With RA	Without RA
Total Contributions	R288,923	R288,923
Tax Saved	R104,012	R0
Net Out-of-pocket Cost	R184,911	R288,923
Future Value	R774,750	R495,840
Effective Total Return	319%	71%
Real Annual Return	7.4%	2.7%
Winner	RA	❌

Conclusion: The RA Is Overwhelmingly Superior

For a sole proprietor:

• An RA reduces your tax immediately

• Your tax saving compounds for decades

• You invest with SARS’s money, not only your own

• Your long-term retirement capital grows significantly faster

Choosing not to contribute means:

• Paying higher tax

• Getting lower investment returns

• Reaching retirement with over R278,000 less

The RA isn’t just a retirement vehicle—it is one of the most powerful and legal tax optimisation strategies available to any natural person in South Africa.