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GrowThenDraw Updated for 2026-27
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SIP → SWP Calculator — Australia

One timeline for the whole plan: build a portfolio with regular investing, then turn it into monthly income — with the CGT discount and marginal rates done properly.

Published by GrowThenDraw Editorial Team · Editorial policy · Methodology & sources

Your plan

Phase 1 — invest

Phase 2 — withdraw

Tip: set this to your inflation assumption (~2.5%) to keep your income's buying power constant.

Assumptions

9% — ASX 200 long-run average, used for both phases

The discounted gain (50% discount for assets held over 12 months) stacks on top of this at marginal rates plus the 2% Medicare levy.

Net monthly income, first withdrawal year (after tax)
$2,237
Lasts all 30 withdrawal years with money left over
Portfolio at the switch
$336,448
Total invested
$120,000
Total tax (withdrawals)
$126,136

The most that portfolio can sustain for the full 30 withdrawal years: $2,686/month before tax.

$172.4K$344.9KYear 1 (grow): $6,301Year 2 (grow): $13,192Year 3 (grow): $20,731Year 4 (grow): $28,976Year 5 (grow): $37,995Year 6 (grow): $47,860Year 7 (grow): $58,650Year 8 (grow): $70,453Year 9 (grow): $83,362Year 10 (grow): $97,483Year 11 (grow): $112,928Year 12 (grow): $129,822Year 13 (grow): $148,301Year 14 (grow): $168,513Year 15 (grow): $190,622Year 16 (grow): $214,804Year 17 (grow): $241,255Year 18 (grow): $270,187Year 19 (grow): $301,833Year 20 (grow): $336,448Year 21 (draw): $336,506Year 22 (draw): $336,569Year 23 (draw): $336,638Year 24 (draw): $336,713Year 25 (draw): $336,796Year 26 (draw): $336,886Year 27 (draw): $336,985Year 28 (draw): $337,093Year 29 (draw): $337,211Year 30 (draw): $337,340Year 31 (draw): $337,481Year 32 (draw): $337,636Year 33 (draw): $337,805Year 34 (draw): $337,990Year 35 (draw): $338,192Year 36 (draw): $338,414Year 37 (draw): $338,656Year 38 (draw): $338,921Year 39 (draw): $339,210Year 40 (draw): $339,527Year 41 (draw): $339,874Year 42 (draw): $340,253Year 43 (draw): $340,667Year 44 (draw): $341,121Year 45 (draw): $341,616Year 46 (draw): $342,159Year 47 (draw): $342,752Year 48 (draw): $343,401Year 49 (draw): $344,111Year 50 (draw): $344,888Y1Y10Y19Y28Y37Y46Y50
Grow phaseDraw phase
Received (net): $773,864Tax: $126,136Still invested: $344,888
Received (net)TaxStill invested
YearPhaseCash flowTaxEnd balance
1Invest$6,000$0$6,301
2Invest$6,000$0$13,192
3Invest$6,000$0$20,731
4Invest$6,000$0$28,976
5Invest$6,000$0$37,995
6Invest$6,000$0$47,860
7Invest$6,000$0$58,650
8Invest$6,000$0$70,453
9Invest$6,000$0$83,362
10Invest$6,000$0$97,483
11Invest$6,000$0$112,928
12Invest$6,000$0$129,822
13Invest$6,000$0$148,301
14Invest$6,000$0$168,513
15Invest$6,000$0$190,622
16Invest$6,000$0$214,804
17Invest$6,000$0$241,255
18Invest$6,000$0$270,187
19Invest$6,000$0$301,833
20Invest$6,000$0$336,448
21Withdraw$26,844$3,156$336,506
22Withdraw$26,703$3,297$336,569
23Withdraw$26,574$3,426$336,638
24Withdraw$26,456$3,544$336,713
25Withdraw$26,348$3,652$336,796
26Withdraw$26,250$3,750$336,886
27Withdraw$26,160$3,840$336,985
28Withdraw$26,077$3,923$337,093
29Withdraw$26,002$3,998$337,211
30Withdraw$25,933$4,067$337,340
31Withdraw$25,870$4,130$337,481
32Withdraw$25,813$4,187$337,636
33Withdraw$25,760$4,240$337,805
34Withdraw$25,712$4,288$337,990
35Withdraw$25,668$4,332$338,192
36Withdraw$25,628$4,372$338,414
37Withdraw$25,592$4,408$338,656
38Withdraw$25,558$4,442$338,921
39Withdraw$25,527$4,473$339,210
40Withdraw$25,499$4,501$339,527
41Withdraw$25,474$4,526$339,874
42Withdraw$25,450$4,550$340,253
43Withdraw$25,429$4,571$340,667
44Withdraw$25,409$4,591$341,121
45Withdraw$25,391$4,609$341,616
46Withdraw$25,375$4,625$342,159
47Withdraw$25,360$4,640$342,752
48Withdraw$25,346$4,654$343,401
49Withdraw$25,333$4,667$344,111
50Withdraw$25,322$4,678$344,888

Why chain the two calculators?

Because the tax on your withdrawal years depends on a number a standalone SWP calculator makes you guess: how much of your portfolio is your own contributions versus growth. Chaining carries it over automatically — the withdrawal phase starts with exactly the portfolio your investing built and your contributions as its cost base.

Every unit sold in the drawdown years has been held well over 12 months, so the 50% CGT discount applies; the discounted gain stacks on your other income at FY2026-27 marginal rates plus the 2% Medicare levy.

The question this answers

"If I auto-invest $500 a month for twenty years, what monthly income does that buy — after tax — and for how long?" The chart shows the full arc: rising bars through accumulation, then the drawdown years, turning red only if and when the portfolio runs out. Superannuation stays out of scope, deliberately — its rules are a different world.

Related reading

Frequently asked questions

Does the 50% CGT discount apply to the withdrawal years?

Yes — by construction. Units sold during a drawdown that follows years of accumulation have been held longer than 12 months, which is the discount's only requirement for resident individuals.

Why does the tax rise over the withdrawal years?

Early withdrawals return mostly your own contributions, which aren't taxed. As your cost base depletes and the portfolio keeps growing, more of each withdrawal is gain — so the taxable share, and the tax, climbs year by year.

Is superannuation included?

No. Super's contribution caps, 15% earnings tax and preservation rules can't be honestly squeezed into a general investing projection. This planner models an ordinary brokerage portfolio outside super.

Tax figures for 2026-27 last verified 3 July 2026 against the official source — how we calculate.

GrowThenDraw does not hold an Australian Financial Services Licence. Any information here is general in nature and does not take into account your objectives, financial situation or needs — consider its appropriateness and seek advice from a licensed adviser before acting.

Relevant bodies in this jurisdiction: ASIC (financial services), ATO (tax).