How much local interest is tax-free in South Africa in 2026/27?

For the 2026 and 2027 years of assessment, interest from a South African source is exempt up to R23 800 a year if you are under 65, or R34 500 from age 65. Budget 2026 made no changes to those amounts. Interest above the exemption is included in taxable income at your marginal rate.

Is the interest exemption per bank account or across all my accounts?

Across all South African interest sources combined, per natural person per tax year. It is not per bank. Add interest from every local account before you decide you are still inside the exemption.

Should I keep my emergency fund in a TFSA?

Usually no, if the same cash in a taxable account would still earn local interest inside the annual exemption. Emergency money needs ready access, and a TFSA withdrawal does not restore annual or lifetime contribution room. Prefer accessible taxable cash under the exemption, and use scarce TFSA room for growth.

Does parking cash in a TFSA waste contribution room?

It can. TFSA returns are free of income tax, dividends tax, and CGT, but annual (R46 000 from 1 March 2026) and lifetime (R500 000) limits are scarce. If taxable interest on the same cash would already sit under the local interest exemption, the TFSA wrapper adds little tax benefit for that yield while consuming room that could shelter growth.

What tax do I pay on interest above the exemption?

Local interest above the annual exemption is included in taxable income and taxed at your marginal income tax rate on assessment. Illustrative example: R50 000 gross interest for an under-65 taxpayer leaves R26 200 taxable after the R23 800 exemption; at an assumed 41% marginal rate that is about R10 742 of tax. Your actual bracket and rebates may differ.

What is a sensible order: taxable cash, TFSA cash, or TFSA growth?

A practical waterfall: keep emergency cash in accessible taxable accounts while combined local interest fits under the exemption; deploy TFSA room to growth assets; hold taxable money-market overflow only when you need the access or the size, accepting tax on interest above the exemption.

Guide

SARS local interest exemption vs idle cash and TFSA room

You already have a large tax-free buffer for local interest: R23 800 a year if you are under 65, or R34 500 from age 65, for the 2026 and 2027 years of assessment. Budget 2026 left those amounts unchanged. Only local interest above the exemption is included in taxable income and taxed at your marginal rate.

Keep emergency cash accessible in taxable accounts while combined interest stays inside that buffer. Put scarce TFSA room (R46 000 annual from 1 March 2026; R500 000 lifetime) toward growth assets, not low-yield cash the exemption already covers. TFSA withdrawals do not restore contribution room.

That SARS bill is often local interest, not a vague investment tax

Filing season often brings a shock: a large amount owed on holdings people describe as investments. Interest, dividends, and capital gains follow different SARS rules. A large bill on cash and money-market balances is typically driven by local interest above the annual exemption, not by CGT on listed shares.

Banks and other approved third-party providers submit IT3(b) interest information to SARS. SARS may pre-populate local interest on your ITR12 from that data.

How the local interest exemption works

For the 2026 and 2027 years of assessment, interest from a South African source earned by a natural person younger than 65 is exempt from normal tax up to R23 800 per year. From age 65 the exemption is R34 500. Budget 2026 noted no changes to those amounts.

The exemption applies per natural person per tax year across all South African interest sources combined. It is not per bank account.

Local interest above the annual exemption is included in taxable income and taxed at your marginal income tax rate on assessment.

Illustrative principal at an assumed 8% annual interest rate (planning assumption, not a SARS rate): R23 800 / 0.08 ≈ R297 500. Actual product rates vary by bank and over time.

Worked examples: interest above the exemption

The examples below are illustrative planning maths. Not advice. Rates and marginal tax are assumptions.

R50 000 gross local interest, under 65: minus R23 800 exemption leaves R26 200 taxable. At an assumed 41% marginal rate, illustrative tax is about R10 742.
R600 000 taxable money market at assumed 8%: gross interest ≈ R48 000; excess over the under-65 exemption ≈ R24 200; at assumed 41% ≈ R9 922 tax on the excess.

Why emergency cash in a TFSA can waste lifetime room

Amounts earned in tax-free investments are free from income tax, dividends tax, and capital gains tax. That does not mean every rand of TFSA room should hold cash. If the same cash in a taxable money-market account would still sit inside the local interest exemption, the TFSA wrapper adds little tax benefit for that yield while consuming scarce annual and lifetime room.

A withdrawal from a tax-free investment does not restore previously used annual or lifetime contribution room. Unused annual TFSA room is also forfeited each year.

Year-1 illustration (assumptions only): R46 000 of TFSA room at an assumed 8% cash yield ≈ R3 680 interest; at an assumed 10% equity return ≈ R4 600. If that R46 000 sat in taxable MM and interest stayed within the R23 800 exemption, the TFSA contribution added little tax benefit for cash but used room that could have sheltered higher-taxed growth.

For how contribution room works across providers, see TFSA across providers. For moving a TFSA without burning room, see TFSA transfer vs withdrawal.

TFSA limits that sit next to the exemption

From 1 March 2026 (2027 year of assessment), the annual tax-free investment contribution limit is R46 000 per person across all tax-free investments combined. The lifetime limit is R500 000. Contributions above the annual or lifetime limit attract a 40% penalty (normal tax) on the excess, added on assessment.

Returns capitalised inside a tax-free investment without being withdrawn are not treated as contributions and do not consume limits. See also TFSA contribution limits for 2026/27.

Four cash buckets side by side

Taxable money market under the exemption: local interest stays within R23 800 (under 65) or R34 500 (65+). Good home for accessible emergency cash. No TFSA room consumed.
Taxable money market above the exemption: excess interest is taxed at your marginal rate. Large idle balances create a visible SARS bill even before you debate wrappers.
Cash inside a TFSA: returns are tax-free, but you spend scarce annual and lifetime room on yield the exemption may already have covered. Withdrawals for emergencies do not restore room.
Growth assets inside a TFSA: uses the same scarce room to shelter returns that can face heavier tax outside the wrapper. Usually a better use of R46 000 / R500 000 than parking emergency cash.

Order of operations: exemption first, then TFSA for growth

Add up expected local interest across every South African bank and money-market account for the tax year.
Size emergency cash in accessible taxable accounts so combined interest stays inside the R23 800 / R34 500 exemption where practical.
Deploy annual TFSA room (R46 000 from 1 March 2026) toward growth assets you cannot shelter elsewhere, before parking low-yield cash in the TFSA.
Treat taxable money-market balances above the exemption buffer as deliberate overflow for access or size, accepting marginal tax on the excess interest.
Do not assume unused TFSA annual room rolls over, and do not rely on withdrawing TFSA cash to free contribution room later.

Where Libevyn fits (and where it does not)

Libevyn helps you see taxable cash and tax-free investments in one place so combined interest and TFSA room are visible across providers. An interest-exemption headroom tracker is on the pricing roadmap; until it ships, map balances into taxable vs tax-free buckets and estimate exemption headroom from your expected yields.

Libevyn does not file your return, move money between banks, or replace SARS assessments. IT3(b) data still comes from your providers.

Key takeaways

Local interest exemption: R23 800 under 65, R34 500 from 65+, for 2026/2027; Budget 2026 made no changes.
Only interest above the exemption is taxed at your marginal rate; add interest across all local sources.
Banks submit IT3(b) interest; SARS may pre-populate your ITR12.
Emergency cash usually belongs in accessible taxable accounts while it fits under the exemption buffer.
TFSA room (R46 000 annual from 1 March 2026; R500 000 lifetime) is scarce: prefer growth over cash the exemption already covers.
TFSA withdrawals do not restore room; excess contributions attract a 40% penalty.
Libevyn shows taxable vs tax-free buckets; an interest-exemption tracker is on the roadmap, not a filing service.

Frequently asked questions

How much local interest is tax-free in South Africa in 2026/27?: For the 2026 and 2027 years of assessment, interest from a South African source is exempt up to R23 800 a year if you are under 65, or R34 500 from age 65. Budget 2026 made no changes to those amounts. Interest above the exemption is included in taxable income at your marginal rate.
Is the interest exemption per bank account or across all my accounts?: Across all South African interest sources combined, per natural person per tax year. It is not per bank. Add interest from every local account before you decide you are still inside the exemption.
Should I keep my emergency fund in a TFSA?: Usually no, if the same cash in a taxable account would still earn local interest inside the annual exemption. Emergency money needs ready access, and a TFSA withdrawal does not restore annual or lifetime contribution room. Prefer accessible taxable cash under the exemption, and use scarce TFSA room for growth.
Does parking cash in a TFSA waste contribution room?: It can. TFSA returns are free of income tax, dividends tax, and CGT, but annual (R46 000 from 1 March 2026) and lifetime (R500 000) limits are scarce. If taxable interest on the same cash would already sit under the local interest exemption, the TFSA wrapper adds little tax benefit for that yield while consuming room that could shelter growth.
What tax do I pay on interest above the exemption?: Local interest above the annual exemption is included in taxable income and taxed at your marginal income tax rate on assessment. Illustrative example: R50 000 gross interest for an under-65 taxpayer leaves R26 200 taxable after the R23 800 exemption; at an assumed 41% marginal rate that is about R10 742 of tax. Your actual bracket and rebates may differ.
Why does SARS already know my bank interest?: Banks and other approved third-party data providers submit IT3(b) interest information to SARS. SARS may pre-populate local interest on the ITR12 from this third-party data.
What is a sensible order: taxable cash, TFSA cash, or TFSA growth?: A practical waterfall: keep emergency cash in accessible taxable accounts while combined local interest fits under the exemption; deploy TFSA room to growth assets; hold taxable money-market overflow only when you need the access or the size, accepting tax on interest above the exemption.

Map cash before you max TFSA with idle cash

Add bank and money-market balances across providers in Libevyn, check whether combined local interest is still inside the SARS exemption, then allocate TFSA room to growth before parking cash. 14-day free trial. No bank passwords. Planning information, not advice.

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Sources include SARS Interest and Dividends guidance, SARS Tax Free Investments guidance, and SARS Third-Party Data / IT3(b) materials. Not financial advice. Libevyn is not an FSP and does not file tax returns. Planning information only. Illustrative rates (for example 8% yield, 41% marginal) are assumptions, not SARS-verified figures. Confirm with SARS or a registered practitioner before acting.