Examples
Examples
Try the starting example
- Opening tax cash reserve ($)
- 100
- Periods: name, output tax $, explicitly allowable input credits $, remittance $, reserve cash transferred in $
- P1,100,20,50,80 P2,120,30,100,90
- Opening net tax liability, signed ($)
- 0
- Closing reserve cash by period ($)
- P1: 130.00; P2: 120.00
- Closing signed tax liability by period ($)
- P1: 30.00; P2: 20.00
- Final reserve minus net liability ($)
- $100.00
- Largest positive net-liability funding gap ($)
- $0.00
Try another scenario
- Opening tax cash reserve ($)
- 0
- Periods: name, output tax $, explicitly allowable input credits $, remittance $, reserve cash transferred in $
- P1,100,20,50,80 P2,120,30,100,90
- Opening net tax liability, signed ($)
- 0
- Closing reserve cash by period ($)
- P1: 30.00; P2: 20.00
- Closing signed tax liability by period ($)
- P1: 30.00; P2: 20.00
- Final reserve minus net liability ($)
- $0.00
- Largest positive net-liability funding gap ($)
- $0.00
Calculation method
Calculation method
Closing reserve cash by period ($)
Prior reserve+entered cash transfer−remittance.
Closing signed tax liability by period ($)
Prior liability+output tax−entered input credits−remittance; a negative liability is a credit balance.
Final reserve minus net liability ($)
Final reserve−final signed liability.
Largest positive net-liability funding gap ($)
max(0,liability−reserve) across opening and closing period snapshots.
Symbols and units
- a
- Opening tax cash reserve ($)
- b
- Periods: name, output tax $, explicitly allowable input credits $, remittance $, reserve cash transferred in $
- c
- Opening net tax liability, signed ($)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- A reserve-cash and supplied-tax-liability ledger. Input credits must already be determined externally. Negative cash or liability remains visible; this does not calculate tax eligibility or file a return.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
HMRC: tax fractions, invoice rounding and credit-note background; rules vary ↗
Background reading; this does not imply endorsement or independent review of SumFizz.