Sept Fifteen vs TinyBAS: Which Is Better in 2026?
A side-by-side comparison of Sept Fifteen and TinyBAS, two finance tools — what each does, who it's best for, and how to choose between them.
Quick verdict
Sept Fifteen and TinyBAS are both finance tools, so it comes down to fit. Pick Sept Fifteen if you want A one-sitting federal estimated-tax number for 1099 and self-employed people — what to send the IRS… Pick TinyBAS if you want Offline Simpler BAS ledger for Australian sole traders — log sales/purchases, copy G1 / 1A /…
Sept Fifteen
A one-sitting federal estimated-tax number for 1099 and self-employed people — what to send the IRS by September 15, 2026.
- Category
- Finance
- Rating
- Not yet rated
- Best for
- taxes, 1099, self-employed
TinyBAS
Offline Simpler BAS ledger for Australian sole traders — log sales/purchases, copy G1 / 1A / 1B into the ATO portal.
- Category
- Finance
- Rating
- Not yet rated
- Best for
- BAS, GST, accounting
| At a glance | Sept Fifteen | TinyBAS |
|---|---|---|
| What it is | A one-sitting federal estimated-tax number for 1099 and self-employed people — what to send the IRS by September 15, 2026. | Offline Simpler BAS ledger for Australian sole traders — log sales/purchases, copy G1 / 1A / 1B into the ATO portal. |
| Category | Finance | Finance |
| Type | Software | Software |
| Best for | taxes, 1099, self-employed, estimated tax | BAS, GST, accounting, Australia |
What is Sept Fifteen?
A one-sitting federal estimated-tax number for 1099 and self-employed people. What to send the IRS by September 15, 2026. Estimate only; not tax advice. From Inkline. Optional Contractor Tax Packet 2026, $15 printables: https://buy.stripe.com/4gMfZh6RR11bcllagT0VO01 — shop: https://velvet-epoch-68an.here.now/
What is TinyBAS?
TinyBAS is a one-time A$19 offline download for GST-registered Australian sole traders on Simpler BAS. Log sales and purchases locally, then copy G1 / 1A / 1B into the ATO portal. No subscription. Not tax advice, not an ATO product.
What problem it solves
GST-registered Australian sole traders need a simple way to track sales and purchases for Simpler BAS without a monthly accounting subscription. TinyBAS keeps the ledger offline and gives you the G1 / 1A / 1B figures to copy into the ATO portal.
Key differences at a glance
- Purpose: Sept Fifteen is A one-sitting federal estimated-tax number for 1099 and self-employed people — what to send the IRS by September 15, 2026. TinyBAS, by contrast, is Offline Simpler BAS ledger for Australian sole traders — log sales/purchases, copy G1 / 1A / 1B into the ATO portal.
- Category & type: both sit in Finance, and both are offered as software.
- Best suited for: Sept Fifteen leans toward taxes, 1099, self-employed, whereas TinyBAS leans toward BAS, GST, accounting.
- Community rating: Sept Fifteen is not yet rated vs TinyBAS is not yet rated. Ratings are community-submitted and change over time.
Sept Fifteen vs TinyBAS: which should you choose?
Sept Fifteen and TinyBAS both serve the finance space, so the best choice depends on your priorities. Choose Sept Fifteen if you want A one-sitting federal estimated-tax number for 1099 and self-employed people — what to send the IRS by September… Choose TinyBAS if you want Offline Simpler BAS ledger for Australian sole traders — log sales/purchases, copy G1 / 1A / 1B into…The smartest move is to try each one's free tier or trial on a real task — that's the fastest way to feel the difference and pick the tool you'll actually stick with.
Frequently asked questions
Is Sept Fifteen better than TinyBAS?
It depends on what you need. Sept Fifteen is A one-sitting federal estimated-tax number for 1099 and self-employed people — what to send the IRS by September 15, 2026. TinyBAS is Offline Simpler BAS ledger for Australian sole traders — log sales/purchases, copy G1 / 1A / 1B into the ATO portal. Both are finance tools, so the right pick comes down to your specific priorities, budget and workflow.
What's the main difference between Sept Fifteen and TinyBAS?
Sept Fifteen focuses on A one-sitting federal estimated-tax number for 1099 and self-employed people — what to send the IRS by September 15, 2026. while TinyBAS focuses on Offline Simpler BAS ledger for Australian sole traders — log sales/purchases, copy G1 / 1A / 1B into the ATO portal. Read the full breakdown above and check each tool's site for current features and pricing.
Can I use both Sept Fifteen and TinyBAS?
In many cases, yes — teams often use complementary tools together. Whether it makes sense depends on overlap in functionality and your budget. Try the free tier or trial of each to see how they fit your stack before committing.
Which is cheaper, Sept Fifteen or TinyBAS?
Pricing changes often, so check each tool's pricing page for the latest. Many tools offer a free tier or trial, which is the best way to evaluate value for your specific usage before you pay.